143489 2015-04-07 11:21:51 -0700 Make it possible to enable LLVM FastISel 2015-04-10 08:10:15 -0700 1 1 1 Unclassified WebKit New Bugs 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 fpizlo fpizlo barraclough benjamin ggaren juergen mark.lam mhahnenb mmirman msaboff nrotem oliver ossy saam sam oldest_to_newest 1083356 0 fpizlo 2015-04-07 11:21:51 -0700 Make it possible to enable LLVM FastISel 1083357 1 250279 fpizlo 2015-04-07 11:23:33 -0700 Created attachment 250279 Patch 1083359 2 fpizlo 2015-04-07 11:23:54 -0700 *** Bug 138523 has been marked as a duplicate of this bug. *** 1083361 3 fpizlo 2015-04-07 11:23:59 -0700 *** Bug 138625 has been marked as a duplicate of this bug. *** 1083362 4 fpizlo 2015-04-07 11:24:45 -0700 We don't want to enable it on X86. Testing ARM64 next. Benchmark report for SunSpider, LongSpider, V8Spider, Octane, Kraken, JSRegress, AsmBench, and CompressionBench on bigmac (MacPro5,1). VMs tested: "SelectionDAG" at /Volumes/Data/pizlo/secondary/OpenSource/WebKitBuild/Release/jsc (r182200) export JSC_enableLLVMFastISel=false "FastISel" at /Volumes/Data/pizlo/secondary/OpenSource/WebKitBuild/Release/jsc (r182200) export JSC_enableLLVMFastISel=true Collected 6 samples per benchmark/VM, with 6 VM invocations per benchmark. Emitted a call to gc() between sample measurements. Used 1 benchmark iteration per VM invocation for warm-up. Used the jsc-specific preciseTime() function to get microsecond-level timing. Reporting benchmark execution times with 95% confidence intervals in milliseconds. SelectionDAG FastISel SunSpider: 3d-cube 8.5997+-0.1195 8.5895+-0.1445 3d-morph 12.2763+-0.1741 ? 12.3106+-0.2126 ? 3d-raytrace 11.5169+-0.3377 11.3405+-0.2460 might be 1.0156x faster access-binary-trees 3.7450+-0.1578 ? 3.7637+-0.0961 ? access-fannkuch 10.4689+-0.2421 10.4601+-0.2007 access-nbody 5.5993+-0.1232 5.5437+-0.1534 might be 1.0100x faster access-nsieve 5.4593+-0.1355 ? 5.5930+-0.1514 ? might be 1.0245x slower bitops-3bit-bits-in-byte 2.3904+-0.0906 2.3597+-0.0927 might be 1.0130x faster bitops-bits-in-byte 6.5479+-0.1260 ? 6.5771+-0.0715 ? bitops-bitwise-and 3.1172+-0.0945 ? 3.1272+-0.0485 ? bitops-nsieve-bits 6.8454+-0.2556 ? 6.8559+-0.1393 ? controlflow-recursive 3.6220+-0.1463 3.5868+-0.1118 crypto-aes 7.3588+-0.2070 7.3105+-0.2618 crypto-md5 4.5729+-0.1534 ? 4.5764+-0.0761 ? crypto-sha1 4.3040+-0.1828 ? 4.3196+-0.1671 ? date-format-tofte 17.3472+-0.6758 ? 17.5007+-0.6940 ? date-format-xparb 10.1877+-0.3588 10.1772+-0.2082 math-cordic 5.6974+-0.0890 5.6133+-0.0586 might be 1.0150x faster math-partial-sums 11.7185+-0.1635 ? 11.8821+-0.1650 ? might be 1.0140x slower math-spectral-norm 3.6212+-0.1360 ? 3.6368+-0.1478 ? regexp-dna 11.3943+-0.2059 ? 11.5802+-0.3477 ? might be 1.0163x slower string-base64 7.8936+-0.1848 7.8191+-0.0877 string-fasta 12.9583+-0.3164 ? 13.1183+-0.2116 ? might be 1.0123x slower string-tagcloud 18.3916+-0.1808 ? 18.7413+-0.4576 ? might be 1.0190x slower string-unpack-code 38.0065+-0.8955 ? 38.3133+-0.9858 ? string-validate-input 9.0782+-0.2968 9.0472+-0.2819 <arithmetic> 9.3353+-0.0584 ? 9.3748+-0.0652 ? might be 1.0042x slower SelectionDAG FastISel LongSpider: 3d-cube 1865.0443+-17.8014 ! 3507.5431+-14.3836 ! definitely 1.8807x slower 3d-morph 2007.0619+-17.2373 1995.2124+-14.1488 3d-raytrace 1542.9008+-16.4015 ! 1707.3601+-18.2749 ! definitely 1.1066x slower access-binary-trees 1915.8303+-5.4544 ? 1920.4260+-28.0326 ? access-fannkuch 597.0572+-19.2605 ? 620.9979+-11.7437 ? might be 1.0401x slower access-nbody 1495.5085+-12.0595 ! 1516.1370+-7.5472 ! definitely 1.0138x slower access-nsieve 1882.1476+-24.7522 ? 1892.9358+-7.6270 ? bitops-3bit-bits-in-byte 62.9661+-0.5505 ^ 60.7209+-0.5645 ^ definitely 1.0370x faster bitops-bits-in-byte 376.5118+-2.2567 ! 404.2630+-3.3823 ! definitely 1.0737x slower bitops-nsieve-bits 1464.5593+-11.0922 ? 1470.9776+-14.3860 ? controlflow-recursive 1051.7330+-11.5337 ! 1125.2125+-6.3360 ! definitely 1.0699x slower crypto-aes 1336.9211+-7.1115 ! 1469.7300+-10.5137 ! definitely 1.0993x slower crypto-md5 986.2363+-12.4707 ! 1111.2268+-6.2500 ! definitely 1.1267x slower crypto-sha1 1347.7334+-33.7064 ! 1521.0999+-17.3160 ! definitely 1.1286x slower date-format-tofte 1527.1635+-26.0328 ? 1543.5298+-10.7866 ? might be 1.0107x slower date-format-xparb 1403.5752+-10.1330 ? 1416.6774+-17.2525 ? math-cordic 1066.8608+-5.4891 ! 1324.9700+-14.1726 ! definitely 1.2419x slower math-partial-sums 1316.3061+-7.1068 ! 1410.8193+-8.6652 ! definitely 1.0718x slower math-spectral-norm 1227.9100+-12.3159 ! 1876.5701+-8.5793 ! definitely 1.5283x slower string-base64 651.0180+-3.9562 ? 656.2692+-4.8383 ? string-fasta 921.2173+-4.5239 ! 951.3451+-25.4720 ! definitely 1.0327x slower string-tagcloud 441.7861+-7.8164 436.7946+-6.1052 might be 1.0114x faster <geometric> 1007.5604+-2.8817 ! 1102.9033+-1.7548 ! definitely 1.0946x slower SelectionDAG FastISel V8Spider: crypto 101.9584+-1.2954 ^ 96.1765+-0.5681 ^ definitely 1.0601x faster deltablue 123.3252+-2.6895 122.9685+-2.4337 earley-boyer 82.4085+-0.9499 82.1640+-0.7160 raytrace 51.5650+-1.2099 50.9358+-1.0471 might be 1.0124x faster regexp 129.0633+-1.4601 128.9525+-2.3959 richards 129.0986+-1.4271 ? 130.7869+-1.3377 ? might be 1.0131x slower splay 65.2642+-1.9563 ? 67.4703+-5.1693 ? might be 1.0338x slower <geometric> 92.5256+-0.5210 92.0957+-1.1748 might be 1.0047x faster SelectionDAG FastISel Octane: encrypt 0.42148+-0.00427 ! 0.45383+-0.00398 ! definitely 1.0767x slower decrypt 7.24277+-0.08315 ! 8.24161+-0.11025 ! definitely 1.1379x slower deltablue x2 0.39034+-0.01019 ! 0.43766+-0.00331 ! definitely 1.1212x slower earley 1.10494+-0.03167 ? 1.15498+-0.03285 ? might be 1.0453x slower boyer 14.22936+-0.06135 14.22274+-0.11674 navier-stokes x2 7.61319+-0.06497 ! 9.22806+-0.11794 ! definitely 1.2121x slower raytrace x2 2.43427+-0.09611 ! 3.00558+-0.15251 ! definitely 1.2347x slower richards x2 0.26589+-0.00362 ! 0.29973+-0.00216 ! definitely 1.1273x slower splay x2 0.67113+-0.01137 ? 0.68897+-0.00727 ? might be 1.0266x slower regexp x2 64.99142+-0.63005 64.82059+-0.91023 pdfjs x2 89.93591+-0.70553 ? 89.95927+-2.13850 ? mandreel x2 103.11619+-0.67479 ! 124.36555+-2.69942 ! definitely 1.2061x slower gbemu x2 93.50565+-2.94178 ? 96.67965+-5.55520 ? might be 1.0339x slower closure 0.99198+-0.01036 ? 1.00270+-0.00929 ? might be 1.0108x slower jquery 12.43881+-0.18042 ? 12.56416+-0.17672 ? might be 1.0101x slower box2d x2 26.71514+-0.32637 ! 27.46626+-0.28792 ! definitely 1.0281x slower zlib x2 722.86532+-7.93585 ! 776.68334+-5.32801 ! definitely 1.0745x slower typescript x2 1436.81160+-20.80254 ? 1460.83370+-14.59704 ? might be 1.0167x slower <geometric> 12.96284+-0.05750 ! 13.97779+-0.05568 ! definitely 1.0783x slower SelectionDAG FastISel Kraken: ai-astar 830.397+-4.090 827.543+-9.930 audio-beat-detection 211.438+-2.595 ! 254.782+-1.764 ! definitely 1.2050x slower audio-dft 290.277+-13.465 ? 322.441+-31.892 ? might be 1.1108x slower audio-fft 158.454+-2.326 ! 182.535+-3.608 ! definitely 1.1520x slower audio-oscillator 376.803+-3.511 ! 385.914+-2.721 ! definitely 1.0242x slower imaging-darkroom 177.480+-2.060 ! 195.769+-2.804 ! definitely 1.1031x slower imaging-desaturate 147.688+-1.339 ! 159.703+-0.667 ! definitely 1.0814x slower imaging-gaussian-blur 225.622+-2.266 ! 252.286+-2.925 ! definitely 1.1182x slower json-parse-financial 97.533+-1.838 96.247+-2.062 might be 1.0134x faster json-stringify-tinderbox 108.371+-0.734 ? 109.008+-1.757 ? stanford-crypto-aes 123.952+-2.862 123.632+-1.813 stanford-crypto-ccm 99.472+-11.188 ? 108.617+-12.698 ? might be 1.0919x slower stanford-crypto-pbkdf2 311.025+-4.970 ? 312.564+-4.749 ? stanford-crypto-sha256-iterative 95.663+-1.213 ? 97.736+-3.373 ? might be 1.0217x slower <arithmetic> 232.441+-1.180 ! 244.913+-2.327 ! definitely 1.0537x slower SelectionDAG FastISel JSRegress: abs-boolean 4.6894+-0.1020 ? 4.7036+-0.0833 ? adapt-to-double-divide 20.2448+-0.4708 19.7487+-0.5439 might be 1.0251x faster aliased-arguments-getbyval 1.8922+-0.2338 ? 2.0666+-0.1937 ? might be 1.0922x slower allocate-big-object 4.7758+-0.4891 4.5614+-0.0379 might be 1.0470x faster arguments-named-and-reflective 21.3042+-0.2437 ^ 20.0065+-0.3491 ^ definitely 1.0649x faster arguments-out-of-bounds 22.3727+-0.2905 ^ 21.3520+-0.2289 ^ definitely 1.0478x faster arguments-strict-mode 19.1051+-0.7753 18.7394+-0.5312 might be 1.0195x faster arguments 17.1198+-0.3580 16.4279+-0.3454 might be 1.0421x faster arity-mismatch-inlining 1.3113+-0.0678 ? 1.3475+-0.1414 ? might be 1.0276x slower array-access-polymorphic-structure 14.5345+-0.1525 ? 14.6381+-0.2875 ? array-nonarray-polymorhpic-access 66.6090+-3.9166 ? 68.4310+-3.0869 ? might be 1.0274x slower array-prototype-every 190.6930+-2.1282 189.0092+-4.1653 array-prototype-forEach 186.8407+-0.8638 185.9291+-1.5337 array-prototype-map 204.8980+-1.3233 ? 210.5504+-7.9014 ? might be 1.0276x slower array-prototype-some 189.7626+-1.8481 189.0440+-2.3175 array-splice-contiguous 89.2187+-2.0189 87.6331+-1.1110 might be 1.0181x faster array-with-double-add 7.6195+-0.1441 ? 7.6444+-0.1527 ? array-with-double-increment 5.6081+-0.1280 ? 5.6687+-0.0907 ? might be 1.0108x slower array-with-double-mul-add 11.8791+-0.1340 ? 11.9427+-0.1200 ? array-with-double-sum 5.5305+-0.1448 ? 5.5979+-0.1219 ? might be 1.0122x slower array-with-int32-add-sub 13.4411+-0.1726 13.3357+-0.1621 array-with-int32-or-double-sum 5.4254+-0.0556 ? 5.5384+-0.1262 ? might be 1.0208x slower ArrayBuffer-DataView-alloc-large-long-lived 74.0944+-3.5205 72.7228+-2.5277 might be 1.0189x faster ArrayBuffer-DataView-alloc-long-lived 33.3169+-1.3638 33.0926+-1.7570 ArrayBuffer-Int32Array-byteOffset 5.2727+-0.0950 ? 5.2962+-0.0907 ? ArrayBuffer-Int8Array-alloc-large-long-lived 71.1624+-1.6337 ? 72.3822+-2.6428 ? might be 1.0171x slower ArrayBuffer-Int8Array-alloc-long-lived-buffer 55.3926+-1.5904 ? 57.4735+-2.6402 ? might be 1.0376x slower ArrayBuffer-Int8Array-alloc-long-lived 28.9157+-1.3897 28.2915+-1.7676 might be 1.0221x faster ArrayBuffer-Int8Array-alloc 26.8741+-2.2263 24.6380+-2.4678 might be 1.0908x faster asmjs_bool_bug 13.5028+-0.2613 13.3617+-0.1222 might be 1.0106x faster assign-custom-setter-polymorphic 6.2513+-0.2151 ? 6.2782+-0.0857 ? assign-custom-setter 8.4838+-0.1920 8.2903+-0.0717 might be 1.0233x faster basic-set 16.1321+-0.3143 ? 16.3488+-0.1665 ? might be 1.0134x slower big-int-mul 7.8496+-0.1435 ? 7.8939+-0.1602 ? boolean-test 4.9461+-0.1076 ? 5.0277+-0.1087 ? might be 1.0165x slower branch-fold 5.3185+-0.1288 ? 5.3487+-0.1252 ? by-val-generic 15.7998+-0.9126 ? 15.8211+-0.7306 ? call-spread-apply 62.7080+-1.8914 ? 63.1357+-1.5990 ? call-spread-call 49.0560+-0.9004 48.8023+-0.6716 captured-assignments 0.8283+-0.0941 ? 0.8475+-0.0911 ? might be 1.0231x slower cast-int-to-double 8.8052+-0.0954 8.8002+-0.1694 cell-argument 13.0802+-0.2886 ^ 12.4643+-0.2344 ^ definitely 1.0494x faster cfg-simplify 4.0194+-0.1285 ? 4.0521+-0.1350 ? chain-getter-access 17.5015+-0.1375 ^ 16.8215+-0.0950 ^ definitely 1.0404x faster cmpeq-obj-to-obj-other 17.3470+-0.2989 17.3003+-0.2790 constant-test 8.2842+-0.1503 8.2405+-0.0809 create-lots-of-functions 42.0282+-0.6981 ? 42.1368+-0.6535 ? DataView-custom-properties 81.4009+-1.4057 ? 83.4624+-3.2204 ? might be 1.0253x slower deconstructing-parameters-overridden-by-function 0.9823+-0.0918 ^ 0.8286+-0.0469 ^ definitely 1.1856x faster delay-tear-off-arguments-strictmode 27.5980+-0.3574 ? 27.8925+-0.3613 ? might be 1.0107x slower deltablue-varargs 367.8245+-3.7122 362.6208+-2.4074 might be 1.0144x faster destructuring-arguments 28.1412+-0.2704 ? 28.2227+-0.4707 ? destructuring-swap 8.5175+-0.1123 8.4937+-0.0791 direct-arguments-getbyval 1.7555+-0.0468 ? 1.9189+-0.1735 ? might be 1.0931x slower div-boolean-double 5.9800+-0.1507 5.9572+-0.1543 div-boolean 10.3669+-0.1949 ? 10.4093+-0.1528 ? double-get-by-val-out-of-bounds 8.4616+-0.3658 8.3654+-0.1671 might be 1.0115x faster double-pollution-getbyval 10.2407+-0.1459 10.1699+-0.1249 double-pollution-putbyoffset 8.3648+-0.2522 ? 8.4335+-0.2016 ? double-to-int32-typed-array-no-inline 3.7060+-0.0990 3.6746+-0.1320 double-to-int32-typed-array 3.2898+-0.1397 3.2819+-0.0496 double-to-uint32-typed-array-no-inline 3.8522+-0.1382 ? 3.8795+-0.1561 ? double-to-uint32-typed-array 3.3427+-0.1091 ? 3.4029+-0.1288 ? might be 1.0180x slower elidable-new-object-dag 67.2061+-0.9196 ! 69.4036+-0.9192 ! definitely 1.0327x slower elidable-new-object-roflcopter 73.4537+-0.6774 72.4845+-0.8684 might be 1.0134x faster elidable-new-object-then-call 70.5998+-3.4176 ^ 62.2038+-1.1127 ^ definitely 1.1350x faster elidable-new-object-tree 74.9192+-0.5778 ^ 73.0699+-0.5764 ^ definitely 1.0253x faster empty-string-plus-int 10.1955+-0.2286 ? 10.2614+-0.1194 ? emscripten-cube2hash 58.1526+-0.6014 57.1345+-0.8926 might be 1.0178x faster exit-length-on-plain-object 32.0852+-1.0174 ? 32.1013+-1.4017 ? external-arguments-getbyval 2.0430+-0.1689 ? 2.2134+-0.1246 ? might be 1.0834x slower external-arguments-putbyval 3.9580+-0.1141 ? 4.0547+-0.0786 ? might be 1.0244x slower fixed-typed-array-storage-var-index 1.9548+-0.0962 1.9411+-0.0821 fixed-typed-array-storage 1.4196+-0.0847 ? 1.4597+-0.1049 ? might be 1.0282x slower Float32Array-matrix-mult 8.1877+-0.1977 ? 8.2923+-0.2134 ? might be 1.0128x slower Float32Array-to-Float64Array-set 120.3352+-2.8371 ? 121.0543+-1.5252 ? Float64Array-alloc-long-lived 116.3851+-1.2076 ? 116.8838+-1.1062 ? Float64Array-to-Int16Array-set 145.8976+-1.4129 145.6190+-1.6514 fold-double-to-int 28.2958+-0.2904 ^ 27.2797+-0.4792 ^ definitely 1.0372x faster fold-get-by-id-to-multi-get-by-offset-rare-int 14.6296+-0.4682 14.5572+-0.3576 fold-get-by-id-to-multi-get-by-offset 12.6135+-0.4332 ? 12.7499+-0.3171 ? might be 1.0108x slower fold-multi-get-by-offset-to-get-by-offset 11.9594+-0.2257 11.8476+-0.7804 fold-multi-get-by-offset-to-poly-get-by-offset 12.1622+-0.1302 11.9609+-0.4659 might be 1.0168x faster fold-multi-put-by-offset-to-poly-put-by-offset 10.8218+-0.6512 10.7195+-0.7266 fold-multi-put-by-offset-to-put-by-offset 9.1284+-0.6866 8.6495+-0.8552 might be 1.0554x faster fold-multi-put-by-offset-to-replace-or-transition-put-by-offset 17.6037+-0.5242 17.5820+-0.2417 fold-put-by-id-to-multi-put-by-offset 11.7725+-0.5786 11.4432+-0.4677 might be 1.0288x faster fold-put-structure 8.7777+-0.7611 8.5015+-0.5916 might be 1.0325x faster for-of-iterate-array-entries 8.7133+-0.0709 ? 8.7412+-0.1949 ? for-of-iterate-array-keys 7.4320+-0.1207 7.3796+-0.1987 for-of-iterate-array-values 6.8846+-0.1477 ? 7.1204+-0.1382 ? might be 1.0342x slower fround 27.4575+-0.3182 ^ 25.5948+-0.5197 ^ definitely 1.0728x faster ftl-library-inlining-dataview 147.3132+-0.4472 147.1323+-2.0459 ftl-library-inlining 149.7279+-1.4417 ? 151.7170+-0.8484 ? might be 1.0133x slower function-dot-apply 3.7060+-0.1414 ? 3.7896+-0.1066 ? might be 1.0226x slower function-test 5.4785+-0.0698 ? 5.5520+-0.1121 ? might be 1.0134x slower function-with-eval 178.6155+-9.1548 173.7661+-0.8569 might be 1.0279x faster gcse-poly-get-less-obvious 36.9332+-0.2872 36.5610+-1.0432 might be 1.0102x faster gcse-poly-get 37.5935+-0.2065 37.3721+-0.5449 gcse 9.3281+-0.1099 9.3197+-0.1727 get-by-id-bimorphic-check-structure-elimination-simple 4.1269+-0.1155 4.1267+-0.1270 get-by-id-bimorphic-check-structure-elimination 12.3902+-0.1096 ? 12.5017+-0.2098 ? get-by-id-chain-from-try-block 14.0478+-0.1678 13.9646+-0.1584 get-by-id-check-structure-elimination 11.1002+-0.1011 11.0998+-0.0637 get-by-id-proto-or-self 34.9756+-3.0700 31.8979+-1.8802 might be 1.0965x faster get-by-id-quadmorphic-check-structure-elimination-simple 5.3534+-0.0499 ? 5.3537+-0.0844 ? get-by-id-self-or-proto 34.4309+-2.5821 33.1685+-2.3244 might be 1.0381x faster get-by-val-out-of-bounds 8.0806+-0.1625 ? 8.1885+-0.1784 ? might be 1.0133x slower get_callee_monomorphic 6.3323+-0.2880 ? 6.4347+-0.2403 ? might be 1.0162x slower get_callee_polymorphic 5.6858+-0.1022 5.6506+-0.1697 getter-no-activation 6.4304+-0.1613 ? 6.4935+-0.1432 ? getter-richards 178.0033+-3.2880 ? 181.4618+-4.4789 ? might be 1.0194x slower getter 10.0794+-0.0987 ? 10.1272+-0.0822 ? global-var-const-infer-fire-from-opt 1.8322+-0.1369 1.6978+-0.0880 might be 1.0792x faster global-var-const-infer 1.5197+-0.1066 ? 1.5834+-0.1721 ? might be 1.0419x slower HashMap-put-get-iterate-keys 50.3003+-0.9066 49.6560+-0.3964 might be 1.0130x faster HashMap-put-get-iterate 49.0870+-0.5173 ? 49.3398+-0.6486 ? HashMap-string-put-get-iterate 51.1516+-0.8312 50.6290+-0.5082 might be 1.0103x faster hoist-make-rope 19.5199+-1.2816 ^ 16.5275+-1.3628 ^ definitely 1.1811x faster hoist-poly-check-structure-effectful-loop 9.8179+-0.0921 9.7946+-0.1395 hoist-poly-check-structure 6.4805+-0.0654 ? 6.5111+-0.1663 ? imul-double-only 14.7276+-0.3495 ^ 12.5468+-0.8325 ^ definitely 1.1738x faster imul-int-only 14.8087+-0.1429 14.4719+-0.4361 might be 1.0233x faster imul-mixed 13.8275+-0.7548 ^ 12.0864+-0.4622 ^ definitely 1.1441x faster in-four-cases 35.8693+-0.4690 35.1101+-0.3447 might be 1.0216x faster in-one-case-false 18.8662+-0.2755 ? 18.9657+-0.2189 ? in-one-case-true 18.7217+-0.2440 ? 18.9977+-0.2512 ? might be 1.0147x slower in-two-cases 19.3696+-0.2470 ? 19.4438+-0.2785 ? indexed-properties-in-objects 4.7735+-0.0540 4.7137+-0.0892 might be 1.0127x faster infer-closure-const-then-mov-no-inline 6.1501+-0.0687 ? 6.1858+-0.1273 ? infer-closure-const-then-mov 27.7511+-0.5943 ^ 22.8807+-0.6616 ^ definitely 1.2129x faster infer-closure-const-then-put-to-scope-no-inline 19.5283+-0.2381 19.3764+-0.2582 infer-closure-const-then-put-to-scope 31.5698+-0.2451 31.1210+-0.4440 might be 1.0144x faster infer-closure-const-then-reenter-no-inline 93.0436+-0.7589 ! 95.4198+-0.8972 ! definitely 1.0255x slower infer-closure-const-then-reenter 231.1912+-3.4959 ? 233.6228+-0.5816 ? might be 1.0105x slower infer-constant-global-property 39.4675+-0.4140 39.4182+-0.2149 infer-constant-property 3.7176+-0.1036 3.6945+-0.0803 infer-one-time-closure-ten-vars 18.3456+-0.2120 ^ 17.6279+-0.3604 ^ definitely 1.0407x faster infer-one-time-closure-two-vars 17.6565+-0.1556 ^ 17.0547+-0.3666 ^ definitely 1.0353x faster infer-one-time-closure 17.5772+-0.1623 ^ 17.0557+-0.2671 ^ definitely 1.0306x faster infer-one-time-deep-closure 31.0248+-0.2441 ^ 30.2749+-0.1668 ^ definitely 1.0248x faster inline-arguments-access 7.0294+-0.1914 7.0182+-0.1282 inline-arguments-aliased-access 7.1417+-0.1101 7.0667+-0.0838 might be 1.0106x faster inline-arguments-local-escape 7.3002+-0.2146 7.2275+-0.2263 might be 1.0101x faster inline-get-scoped-var 6.0265+-0.0786 ? 6.0536+-0.1425 ? inlined-put-by-id-transition 17.8819+-0.2240 ? 18.2325+-0.2201 ? might be 1.0196x slower int-or-other-abs-then-get-by-val 9.6504+-0.0782 ? 9.6875+-0.1583 ? int-or-other-abs-zero-then-get-by-val 34.2129+-0.2819 34.1840+-0.5952 int-or-other-add-then-get-by-val 8.6727+-0.1049 ? 8.7348+-0.1442 ? int-or-other-add 9.2454+-0.0683 9.2063+-0.1664 int-or-other-div-then-get-by-val 6.6267+-0.1768 ? 6.6848+-0.1199 ? int-or-other-max-then-get-by-val 7.3953+-0.1760 ? 7.4728+-0.1138 ? might be 1.0105x slower int-or-other-min-then-get-by-val 7.4847+-0.1070 7.3523+-0.0983 might be 1.0180x faster int-or-other-mod-then-get-by-val 6.2106+-0.1448 ? 6.2990+-0.1011 ? might be 1.0142x slower int-or-other-mul-then-get-by-val 6.7827+-0.1100 ? 6.8452+-0.1446 ? int-or-other-neg-then-get-by-val 8.2593+-0.1484 ? 8.4526+-0.1202 ? might be 1.0234x slower int-or-other-neg-zero-then-get-by-val 34.2902+-0.3664 ? 34.3126+-0.3569 ? int-or-other-sub-then-get-by-val 9.2069+-0.1346 9.1265+-0.1468 int-or-other-sub 5.7812+-0.0712 5.7740+-0.0870 int-overflow-local 8.2546+-0.1608 ? 8.2580+-0.0828 ? Int16Array-alloc-long-lived 82.5020+-0.9122 ? 82.6247+-0.6534 ? Int16Array-bubble-sort-with-byteLength 52.0377+-0.6363 51.9418+-0.5616 Int16Array-bubble-sort 50.2659+-0.4678 50.1385+-1.2946 Int16Array-load-int-mul 2.3125+-0.1125 2.2966+-0.0408 Int16Array-to-Int32Array-set 113.6869+-0.9490 ? 114.7040+-0.7833 ? Int32Array-alloc-large 38.0277+-0.8765 ? 38.2511+-0.8850 ? Int32Array-alloc-long-lived 91.1698+-0.6881 ? 91.6479+-0.9127 ? Int32Array-alloc 5.5246+-0.1722 ? 5.5702+-0.1681 ? Int32Array-Int8Array-view-alloc 15.8805+-0.4929 15.3928+-0.2661 might be 1.0317x faster int52-spill 12.2472+-0.2581 ? 12.2904+-0.2831 ? Int8Array-alloc-long-lived 75.6414+-1.0315 75.5951+-0.8525 Int8Array-load-with-byteLength 5.2231+-0.1188 5.2195+-0.1305 Int8Array-load 5.2445+-0.0815 5.1987+-0.0987 integer-divide 19.5997+-0.1575 ? 19.7310+-0.2281 ? integer-modulo 3.6654+-0.2039 3.5684+-0.1223 might be 1.0272x faster large-int-captured 10.2194+-0.3193 10.0739+-0.1696 might be 1.0145x faster large-int-neg 31.7052+-0.3500 ? 32.1844+-0.5373 ? might be 1.0151x slower large-int 28.2292+-0.3419 ? 28.3281+-0.2415 ? logical-not 8.2285+-0.1733 8.2257+-0.0871 lots-of-fields 23.7387+-0.1998 ? 23.9305+-0.2467 ? make-indexed-storage 5.6999+-0.2224 5.5838+-0.4229 might be 1.0208x faster make-rope-cse 7.4395+-0.1881 ? 7.4797+-0.1587 ? marsaglia-larger-ints 64.6115+-0.5563 ! 67.8317+-0.5070 ! definitely 1.0498x slower marsaglia-osr-entry 36.2752+-0.8264 ! 38.1157+-0.5739 ! definitely 1.0507x slower max-boolean 4.0587+-0.1348 ? 4.2760+-0.5059 ? might be 1.0535x slower method-on-number 34.2976+-1.3779 ? 34.5450+-0.5705 ? min-boolean 3.8831+-0.0867 3.7958+-0.0924 might be 1.0230x faster minus-boolean-double 4.4181+-0.0886 ? 4.4392+-0.0750 ? minus-boolean 3.6857+-0.0990 ? 3.8219+-0.1021 ? might be 1.0370x slower misc-strict-eq 76.9371+-5.7151 69.6841+-3.3935 might be 1.1041x faster mod-boolean-double 14.5115+-0.2081 ? 14.5239+-0.1009 ? mod-boolean 9.3303+-0.0428 ? 9.3874+-0.0565 ? mul-boolean-double 5.0826+-0.0742 5.0790+-0.0507 mul-boolean 4.0833+-0.0463 4.0574+-0.0961 neg-boolean 4.7247+-0.1031 4.6320+-0.0828 might be 1.0200x faster negative-zero-divide 0.6345+-0.0875 ? 0.6430+-0.0890 ? might be 1.0133x slower negative-zero-modulo 0.6419+-0.0852 0.6416+-0.0856 negative-zero-negate 0.5625+-0.0787 0.5168+-0.0166 might be 1.0884x faster nested-function-parsing 72.5534+-0.7649 72.4578+-0.7705 new-array-buffer-dead 4.1733+-0.1565 4.1412+-0.1059 new-array-buffer-push 10.4566+-0.2856 ? 10.6333+-0.2344 ? might be 1.0169x slower new-array-dead 18.5350+-0.5539 17.5635+-0.4374 might be 1.0553x faster new-array-push 6.7718+-0.1904 6.7287+-0.1598 no-inline-constructor 185.8405+-1.1437 ? 186.2167+-1.6442 ? number-test 4.9538+-0.1234 ? 4.9563+-0.0772 ? object-closure-call 10.6423+-0.1428 10.5911+-0.1815 object-test 5.3088+-0.0746 ? 5.3118+-0.0490 ? obvious-sink-pathology-taken 224.5919+-1.9574 ! 239.9729+-1.2429 ! definitely 1.0685x slower obvious-sink-pathology 207.1306+-2.1107 ? 209.7955+-1.8423 ? might be 1.0129x slower obviously-elidable-new-object 59.7957+-0.8936 57.6697+-2.6974 might be 1.0369x faster plus-boolean-arith 4.1835+-0.1298 4.0886+-0.0991 might be 1.0232x faster plus-boolean-double 4.5261+-0.0773 4.4631+-0.0527 might be 1.0141x faster plus-boolean 3.6762+-0.0699 ? 3.6972+-0.1180 ? poly-chain-access-different-prototypes-simple 5.4100+-0.2087 5.3170+-0.0694 might be 1.0175x faster poly-chain-access-different-prototypes 3.9245+-0.1244 ? 3.9889+-0.0744 ? might be 1.0164x slower poly-chain-access-simpler 5.2791+-0.0767 ? 5.3349+-0.0920 ? might be 1.0106x slower poly-chain-access 3.9854+-0.1055 3.9816+-0.0847 poly-stricteq 101.2163+-0.9053 ? 102.2290+-0.3011 ? might be 1.0100x slower polymorphic-array-call 2.6107+-0.2761 2.5710+-0.2081 might be 1.0154x faster polymorphic-get-by-id 5.3105+-0.0866 ? 5.3501+-0.1189 ? polymorphic-put-by-id 46.8473+-2.0091 ? 47.1553+-2.5377 ? polymorphic-structure 30.6224+-0.9654 ? 31.1726+-0.6363 ? might be 1.0180x slower polyvariant-monomorphic-get-by-id 17.7112+-0.1965 17.5722+-0.5159 proto-getter-access 17.1846+-0.1480 ^ 16.7629+-0.2553 ^ definitely 1.0252x faster put-by-id-replace-and-transition 14.8277+-0.2224 ? 15.0968+-0.4135 ? might be 1.0181x slower put-by-id-slightly-polymorphic 4.0701+-0.0575 ? 4.1465+-0.0979 ? might be 1.0188x slower put-by-id 20.8864+-0.4660 ? 21.0407+-0.3754 ? put-by-val-direct 1.1365+-0.0813 1.1037+-0.0826 might be 1.0297x faster put-by-val-large-index-blank-indexing-type 11.7750+-0.6287 11.6176+-0.6512 might be 1.0135x faster put-by-val-machine-int 4.4420+-0.1052 ? 4.5068+-0.1145 ? might be 1.0146x slower rare-osr-exit-on-local 25.9587+-0.2790 25.9373+-0.1749 register-pressure-from-osr 38.6895+-0.4197 ? 38.8131+-0.3164 ? setter 7.7931+-0.0714 ? 7.7939+-0.1163 ? simple-activation-demo 41.3110+-0.5326 41.1925+-0.3382 simple-getter-access 21.9587+-0.5853 ! 23.4349+-0.3350 ! definitely 1.0672x slower simple-poly-call-nested 13.4834+-0.3536 ? 13.6738+-0.2535 ? might be 1.0141x slower simple-poly-call 2.2957+-0.2115 ? 2.3490+-0.1711 ? might be 1.0232x slower sin-boolean 30.7915+-0.4586 29.4427+-1.0075 might be 1.0458x faster singleton-scope 130.6710+-1.8339 129.4368+-1.2777 sinkable-new-object-dag 116.7161+-0.6658 ! 131.4027+-1.3962 ! definitely 1.1258x slower sinkable-new-object-taken 89.3175+-3.8291 ! 103.1487+-0.7717 ! definitely 1.1549x slower sinkable-new-object 63.9858+-0.5780 ^ 62.0129+-0.5843 ^ definitely 1.0318x faster slow-array-profile-convergence 5.2005+-0.1081 5.0825+-0.2109 might be 1.0232x faster slow-convergence 5.8536+-0.1389 ? 5.9589+-0.1895 ? might be 1.0180x slower sparse-conditional 1.8931+-0.1123 ? 1.9236+-0.0993 ? might be 1.0161x slower splice-to-remove 34.0475+-1.5103 ? 34.6749+-1.3049 ? might be 1.0184x slower string-char-code-at 29.9552+-0.2873 29.7500+-0.2287 string-concat-object 4.0517+-0.2457 4.0291+-0.3002 string-concat-pair-object 3.7623+-0.2735 ? 3.9700+-0.1561 ? might be 1.0552x slower string-concat-pair-simple 20.3565+-0.4312 20.1445+-0.5254 might be 1.0105x faster string-concat-simple 20.7802+-0.1630 ? 21.0522+-0.3823 ? might be 1.0131x slower string-cons-repeat 13.0412+-0.1751 12.8580+-0.1634 might be 1.0142x faster string-cons-tower 13.1147+-0.2616 ? 13.1979+-0.3825 ? string-equality 33.1228+-0.4960 32.7658+-0.3679 might be 1.0109x faster string-get-by-val-big-char 13.8846+-0.0974 ? 14.0727+-0.3712 ? might be 1.0135x slower string-get-by-val-out-of-bounds-insane 8.0847+-0.1462 8.0760+-0.0878 string-get-by-val-out-of-bounds 9.6835+-0.1373 9.5571+-0.1409 might be 1.0132x faster string-get-by-val 6.7431+-0.1197 ? 6.8752+-0.0953 ? might be 1.0196x slower string-hash 3.5725+-0.0895 ? 3.5977+-0.0805 ? string-long-ident-equality 26.2828+-0.3446 ? 26.4396+-0.3625 ? string-out-of-bounds 22.6351+-0.3147 ^ 21.2159+-0.2664 ^ definitely 1.0669x faster string-repeat-arith 62.6082+-0.3941 ? 62.6716+-0.4003 ? string-sub 119.4828+-0.6511 ? 119.7570+-0.9638 ? string-test 4.9519+-0.1880 4.9075+-0.1531 string-var-equality 61.6142+-0.7637 61.3372+-0.4645 structure-hoist-over-transitions 4.2059+-0.2620 4.1911+-0.1554 substring-concat-weird 74.9517+-0.3501 ? 75.2542+-1.2201 ? substring-concat 79.3645+-1.0033 ? 79.6346+-0.8790 ? substring 90.4904+-0.7933 ? 90.8223+-0.9722 ? switch-char-constant 3.8668+-0.0792 3.7979+-0.0752 might be 1.0181x faster switch-char 11.3082+-0.1620 ? 11.5399+-0.4236 ? might be 1.0205x slower switch-constant 14.8455+-0.1959 14.6940+-0.5171 might be 1.0103x faster switch-string-basic-big-var 31.3233+-1.6646 30.3767+-1.1267 might be 1.0312x faster switch-string-basic-big 24.7890+-0.7978 24.3688+-1.0018 might be 1.0172x faster switch-string-basic-var 33.3917+-1.4025 32.6048+-0.8702 might be 1.0241x faster switch-string-basic 24.9836+-2.3076 24.4477+-1.6871 might be 1.0219x faster switch-string-big-length-tower-var 30.7263+-0.3658 30.5112+-0.0930 switch-string-length-tower-var 26.5222+-0.2905 26.3319+-0.2350 switch-string-length-tower 21.9843+-1.4445 ? 22.3167+-1.4779 ? might be 1.0151x slower switch-string-short 20.6147+-0.2382 ? 20.8482+-0.3281 ? might be 1.0113x slower switch 21.0638+-0.3814 ? 21.3770+-0.3676 ? might be 1.0149x slower tear-off-arguments-simple 5.6965+-0.2921 5.5304+-0.2056 might be 1.0300x faster tear-off-arguments 7.9628+-0.1787 7.8462+-0.1498 might be 1.0149x faster temporal-structure 19.9055+-0.1879 19.8280+-0.2108 to-int32-boolean 25.4525+-0.3122 ? 25.5382+-0.2572 ? try-catch-get-by-val-cloned-arguments 28.6984+-0.5083 28.4295+-0.3145 try-catch-get-by-val-direct-arguments 11.6765+-1.3606 11.5554+-1.1812 might be 1.0105x faster try-catch-get-by-val-scoped-arguments 13.7115+-0.1727 ? 13.7313+-0.2693 ? undefined-property-access 597.6775+-5.0579 ^ 589.1895+-2.1319 ^ definitely 1.0144x faster undefined-test 5.0271+-0.0844 ? 5.1060+-0.1872 ? might be 1.0157x slower unprofiled-licm 36.6673+-0.2296 ^ 34.4048+-0.8722 ^ definitely 1.0658x faster varargs-call 24.8457+-0.2608 ? 24.9020+-0.2522 ? varargs-construct-inline 38.5220+-0.3151 38.3725+-0.3708 varargs-construct 57.5459+-0.9338 ? 59.3946+-0.9615 ? might be 1.0321x slower varargs-inline 15.6607+-0.2578 ^ 14.7590+-0.1916 ^ definitely 1.0611x faster varargs-strict-mode 18.0523+-0.3413 ? 18.1833+-0.3542 ? varargs 17.7978+-0.2294 ? 18.1201+-0.1917 ? might be 1.0181x slower weird-inlining-const-prop 3.7823+-0.1819 ? 3.8913+-0.2240 ? might be 1.0288x slower <geometric> 14.9237+-0.0240 ^ 14.8598+-0.0340 ^ definitely 1.0043x faster SelectionDAG FastISel AsmBench: bigfib.cpp 887.0988+-8.6434 ! 1099.3190+-12.8987 ! definitely 1.2392x slower cray.c 875.6460+-6.4732 ! 948.3042+-9.0611 ! definitely 1.0830x slower dry.c 1038.3807+-11.1271 ! 1174.2063+-10.1666 ! definitely 1.1308x slower FloatMM.c 1296.5059+-5.7447 ! 1424.7773+-11.2949 ! definitely 1.0989x slower gcc-loops.cpp 8230.2213+-59.3281 ! 10292.2275+-28.3838 ! definitely 1.2505x slower n-body.c 2467.5656+-12.5657 ! 2647.4965+-10.3973 ! definitely 1.0729x slower Quicksort.c 714.0405+-13.2013 ! 764.2223+-6.4279 ! definitely 1.0703x slower stepanov_container.cpp 6364.0815+-151.5082 ! 6774.4578+-178.0046 ! definitely 1.0645x slower Towers.c 610.3955+-4.0709 ! 629.9341+-5.0971 ! definitely 1.0320x slower <geometric> 1572.7714+-6.5098 ! 1751.2524+-9.2044 ! definitely 1.1135x slower SelectionDAG FastISel CompressionBench: huffman 783.6010+-7.8806 780.8865+-12.5274 arithmetic-simple 723.0556+-3.1654 ! 750.0397+-3.4141 ! definitely 1.0373x slower arithmetic-precise 556.8846+-5.2662 ! 571.9472+-5.1301 ! definitely 1.0270x slower arithmetic-complex-precise 556.9940+-4.9284 ! 573.0284+-3.7072 ! definitely 1.0288x slower arithmetic-precise-order-0 789.6442+-15.5094 ? 798.1486+-8.8324 ? might be 1.0108x slower arithmetic-precise-order-1 586.8455+-5.0994 ! 624.7945+-18.9340 ! definitely 1.0647x slower arithmetic-precise-order-2 661.7862+-11.5918 ! 687.3401+-12.8577 ! definitely 1.0386x slower arithmetic-simple-order-1 714.2471+-5.7002 ! 742.1235+-7.0381 ! definitely 1.0390x slower arithmetic-simple-order-2 793.6716+-12.7723 ! 827.5933+-12.2754 ! definitely 1.0427x slower lz-string 636.9012+-29.5865 618.1506+-38.2922 might be 1.0303x faster <geometric> 674.3033+-2.5072 ! 691.3106+-5.5432 ! definitely 1.0252x slower SelectionDAG FastISel SelectionDAG FastISel Geomean of preferred means: <scaled-result> 119.4692+-0.1742 ! 124.7443+-0.3773 ! definitely 1.0442x slower 1083363 5 fpizlo 2015-04-07 11:25:49 -0700 Note that this currently conflates enabling FastISel and using basic RA. Maybe that's not optimal for X86. But anyway, my next move is to test this on ARM64 and see what happens. 1083367 6 juergen 2015-04-07 11:37:20 -0700 FastISel for X86 hasn't been optimized for Javascript yet. Testing Basic RA and/or disabling the Machine Instruction Scheduler is worth giving a try on X86. 1083377 7 fpizlo 2015-04-07 12:22:59 -0700 And it's profitable for ARM64. Benchmark report for SunSpider, Octane, Kraken, and AsmBench. VMs tested: "SelectionDAG" at /Volumes/Data/pizlo/secondary/OpenSource/JscArmBuild/Release-iphoneos/JavaScriptCore.framework/Resources/jsc export JSC_enableLLVMFastISel=false "FastISel" at /Volumes/Data/pizlo/secondary/OpenSource/JscArmBuild/Release-iphoneos/JavaScriptCore.framework/Resources/jsc export JSC_enableLLVMFastISel=true Collected 3 samples per benchmark/VM, with 3 VM invocations per benchmark. Emitted a call to gc() between sample measurements. Used 1 benchmark iteration per VM invocation for warm-up. Used the jsc-specific preciseTime() function to get microsecond-level timing. Reporting benchmark execution times with 95% confidence intervals in milliseconds. SelectionDAG FastISel SunSpider: 3d-cube 19.1584+-1.5976 19.0782+-1.5476 3d-morph 18.4647+-0.4147 ? 18.5917+-0.5864 ? 3d-raytrace 19.8375+-0.9101 ? 21.0723+-3.9045 ? might be 1.0622x slower access-binary-trees 6.2598+-0.6093 6.2017+-0.4173 access-fannkuch 15.0500+-1.9685 ? 15.7166+-4.2463 ? might be 1.0443x slower access-nbody 8.7649+-0.0676 ? 8.9951+-0.8798 ? might be 1.0263x slower access-nsieve 6.5923+-0.2791 ? 6.6240+-0.3910 ? bitops-3bit-bits-in-byte 3.0800+-0.3071 ? 3.1207+-0.2709 ? might be 1.0132x slower bitops-bits-in-byte 10.9430+-0.5485 ? 10.9932+-1.7605 ? bitops-bitwise-and 6.0168+-0.2334 5.9670+-0.1393 bitops-nsieve-bits 8.4460+-0.0802 ? 8.5463+-0.2661 ? might be 1.0119x slower controlflow-recursive 5.6418+-0.1320 ? 6.3622+-2.9473 ? might be 1.1277x slower crypto-aes 13.1012+-0.7841 ? 13.2612+-1.5332 ? might be 1.0122x slower crypto-md5 8.8907+-7.9512 ? 9.6057+-8.0888 ? might be 1.0804x slower crypto-sha1 7.0814+-0.3844 ? 7.2605+-0.1854 ? might be 1.0253x slower date-format-tofte 26.3088+-2.7523 25.8010+-0.7791 might be 1.0197x faster date-format-xparb 16.2147+-0.9355 ? 17.3440+-4.6970 ? might be 1.0696x slower math-cordic 9.5390+-0.1404 ? 9.7357+-0.6370 ? might be 1.0206x slower math-partial-sums 15.1840+-0.7492 ? 15.2391+-0.6273 ? math-spectral-norm 5.1752+-0.6829 ? 8.9093+-3.1804 ? might be 1.7215x slower regexp-dna 18.8178+-0.6276 18.5535+-0.9504 might be 1.0142x faster string-base64 11.7364+-1.0907 11.4598+-0.3804 might be 1.0241x faster string-fasta 16.9639+-0.8497 16.5520+-0.1265 might be 1.0249x faster string-tagcloud 30.1510+-1.6947 ? 30.1854+-5.0598 ? string-unpack-code 69.5977+-2.1304 67.7461+-1.9471 might be 1.0273x faster string-validate-input 13.4931+-0.4232 ? 14.2054+-2.0545 ? might be 1.0528x slower <arithmetic> 15.0196+-0.2969 ? 15.2742+-0.3394 ? might be 1.0169x slower SelectionDAG FastISel Octane: encrypt 0.53884+-0.00167 ! 0.56236+-0.00388 ! definitely 1.0437x slower decrypt 10.09786+-0.08573 ^ 9.73540+-0.06686 ^ definitely 1.0372x faster deltablue x2 0.47122+-0.09774 0.44781+-0.03957 might be 1.0523x faster earley 1.60465+-0.13677 1.57417+-0.04395 might be 1.0194x faster boyer 16.84935+-0.30842 ? 17.00140+-0.23350 ? navier-stokes x2 21.06951+-0.59193 20.95475+-0.10441 raytrace x2 4.24897+-0.21862 ? 4.28543+-4.21308 ? richards x2 0.23855+-0.00981 ! 0.25425+-0.00457 ! definitely 1.0658x slower splay x2 1.76973+-0.03330 1.76386+-0.00131 regexp x2 108.57046+-2.92004 108.21400+-3.05217 pdfjs x2 133.58375+-1.69675 ? 133.71515+-3.14950 ? mandreel x2 221.21532+-9.45257 212.11890+-8.92153 might be 1.0429x faster gbemu x2 187.78388+-32.53771 185.41156+-33.68148 might be 1.0128x faster closure 1.40434+-0.01542 ? 1.42800+-0.07583 ? might be 1.0169x slower jquery 19.49726+-0.19485 ? 19.54411+-0.21783 ? box2d x2 72.95358+-10.28726 69.47765+-4.32754 might be 1.0500x faster zlib x2 1250.08369+-392.99709 1199.90525+-342.64089 might be 1.0418x faster typescript x2 3081.99731+-30.42784 3008.99984+-58.76044 might be 1.0243x faster <geometric> 22.48137+-0.20623 22.19825+-1.64422 might be 1.0128x faster SelectionDAG FastISel Kraken: ai-astar 861.540+-191.400 853.498+-253.910 audio-beat-detection 280.905+-28.173 ? 306.554+-30.146 ? might be 1.0913x slower audio-dft 757.085+-14.864 ? 766.236+-4.890 ? might be 1.0121x slower audio-fft 190.076+-5.799 178.430+-11.966 might be 1.0653x faster audio-oscillator 497.191+-26.893 469.066+-9.328 might be 1.0600x faster imaging-darkroom 309.485+-10.596 308.856+-8.454 imaging-desaturate 163.043+-3.425 ^ 152.891+-1.342 ^ definitely 1.0664x faster imaging-gaussian-blur 230.257+-10.870 217.556+-10.133 might be 1.0584x faster json-parse-financial 119.880+-2.326 ? 120.091+-0.324 ? json-stringify-tinderbox 126.949+-3.036 ? 127.377+-2.736 ? stanford-crypto-aes 170.821+-15.293 162.193+-13.150 might be 1.0532x faster stanford-crypto-ccm 115.358+-6.060 ? 122.424+-47.992 ? might be 1.0612x slower stanford-crypto-pbkdf2 438.124+-5.427 ? 438.525+-5.339 ? stanford-crypto-sha256-iterative 144.810+-1.107 ? 146.090+-1.826 ? <arithmetic> 314.680+-19.245 312.128+-20.173 might be 1.0082x faster SelectionDAG FastISel AsmBench: bigfib.cpp 1614.4840+-87.2817 1478.4010+-247.9110 might be 1.0920x faster cray.c 1196.2056+-48.0512 ^ 1109.1813+-35.6899 ^ definitely 1.0785x faster dry.c 848.3123+-20.4077 ? 849.0481+-18.3524 ? FloatMM.c 1411.4184+-5.6955 ^ 1398.0672+-1.5206 ^ definitely 1.0095x faster gcc-loops.cpp 9130.2301+-126.0490 ^ 8407.3656+-87.8810 ^ definitely 1.0860x faster n-body.c 2686.2397+-6.8112 2674.9181+-7.1344 Quicksort.c 1064.3299+-3.9816 1058.7861+-20.2545 stepanov_container.cpp 12733.0667+-286.4764 12402.7603+-45.8994 might be 1.0266x faster Towers.c 560.9787+-8.8784 545.6500+-18.0831 might be 1.0281x faster <geometric> 1962.1021+-8.6012 ^ 1893.7075+-33.6412 ^ definitely 1.0361x faster SelectionDAG FastISel SelectionDAG FastISel Geomean of preferred means: <scaled-result> 120.1578+-2.3493 118.9667+-1.9308 might be 1.0100x faster 1083381 8 fpizlo 2015-04-07 12:27:50 -0700 Ossy: this patch enables FastISel on iOS/ARM64. I believe that it is broadly profitable on any ARM64 because: - LLVM's FastISel backend generates code more quickly than the SelectionDAG backend. - ARM64 is an easy-enough target to generate code for that SelectionDAG's throughput benefits don't materialize; the code from FastISel is good enough. - This also switches to a simpler register allocator on ARM64, because ARM64 has so many registers. The only downside of enabling it is that it requires a new-enough LLVM. I believe that 3.6 is new enough. I suspect it would be better to just enable this on all ARM64 and not have any PLATFORM(IOS) condition. Are you OK with this? 1083387 9 250279 msaboff 2015-04-07 12:37:51 -0700 Comment on attachment 250279 Patch r=me 1083388 10 fpizlo 2015-04-07 12:42:34 -0700 Landed in http://trac.webkit.org/changeset/182483 1084308 11 ossy 2015-04-10 08:10:15 -0700 (In reply to comment #8) > Ossy: this patch enables FastISel on iOS/ARM64. I believe that it is > broadly profitable on any ARM64 because: > > - LLVM's FastISel backend generates code more quickly than the SelectionDAG > backend. > - ARM64 is an easy-enough target to generate code for that SelectionDAG's > throughput benefits don't materialize; the code from FastISel is good enough. > - This also switches to a simpler register allocator on ARM64, because ARM64 > has so many registers. > > The only downside of enabling it is that it requires a new-enough LLVM. I > believe that 3.6 is new enough. > > I suspect it would be better to just enable this on all ARM64 and not have > any PLATFORM(IOS) condition. > > Are you OK with this? Thanks for the heads up. I filed a new bug report for it: bug143606. 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