30293 2009-10-11 19:33:41 -0700 [Qt] performance regressions on loading page after ImageDecoderQt changes 2010-09-23 11:24:40 -0700 1 1 1 Unclassified WebKit WebCore Misc. 528+ (Nightly build) PC OS X 10.5 RESOLVED FIXED Performance, Qt, Regression P2 Normal --- 34208 1 zecke webkit-qt-unassigned benjamin hausmann jturcotte oldest_to_newest 153960 0 zecke 2009-10-11 19:33:41 -0700 The old and new code has been executed on the same data and 30 iterations each. The majority of cases are faster, some show a regression we should need to understand. The point of this bug is to understand the cause of this regression. loading test row - slower in msecs on 30 iterations row01 - 3msec row02 - 6msec row14 - 844msec row16 - 1031msec row19 - 538msec row22 - 49msec row24 - 73msec row25 - 693msec row26 - 705msec row30 - 3msec row32 - 1785msec row37 - 35msec row39 - 261msec cycling: slower in msecs on 30 iterations row09 - 9msec row11 - 39msec row17 - 1msec row27 - 10msec row30 - 8msec row32 - 114msec row38 - 1msec row39 - 1051msec 154000 1 zecke 2009-10-12 01:16:40 -0700 (In reply to comment #0) > row32 - 1785msec This does not happen anymore. I will have to redo tests and verify the /etc/hosts. 154004 2 zecke 2009-10-12 01:46:33 -0700 Okay, new regression list: RESULT : tst_Loading::load():"row06": - 576.83 msec per iteration (total: 17305, iterations: 30) + 623.29 msec per iteration (total: 18699, iterations: 30) RESULT : tst_Loading::load():"row09": - 3.33 msec per iteration (total: 100, iterations: 30) + 5.23 msec per iteration (total: 157, iterations: 30) RESULT : tst_Loading::load():"row10": - 872.39 msec per iteration (total: 26172, iterations: 30) + 875.20 msec per iteration (total: 26256, iterations: 30) RESULT : tst_Loading::load():"row12": - 411.80 msec per iteration (total: 12354, iterations: 30) + 412.33 msec per iteration (total: 12370, iterations: 30) RESULT : tst_Loading::load():"row14": - 215.7 msec per iteration (total: 6472, iterations: 30) + 304.4 msec per iteration (total: 9134, iterations: 30) RESULT : tst_Loading::load():"row18": - 1,000.6 msec per iteration (total: 30020, iterations: 30) + 1,019.8 msec per iteration (total: 30597, iterations: 30) RESULT : tst_Loading::load():"row19": - 23.6 msec per iteration (total: 710, iterations: 30) + 30.1 msec per iteration (total: 905, iterations: 30) RESULT : tst_Loading::load():"row20": - 80.29 msec per iteration (total: 2409, iterations: 30) + 98.70 msec per iteration (total: 2961, iterations: 30) RESULT : tst_Loading::load():"row22": - 2.7 msec per iteration (total: 83, iterations: 30) + 3.2 msec per iteration (total: 96, iterations: 30) RESULT : tst_Loading::load():"row25": - 49.03 msec per iteration (total: 1471, iterations: 30) + 49.23 msec per iteration (total: 1477, iterations: 30) RESULT : tst_Loading::load():"row26": - 138.1 msec per iteration (total: 4144, iterations: 30) + 152.2 msec per iteration (total: 4567, iterations: 30) RESULT : tst_Loading::load():"row30": - 5.36 msec per iteration (total: 161, iterations: 30) + 7.36 msec per iteration (total: 221, iterations: 30) RESULT : tst_Loading::load():"row31": - 40.66 msec per iteration (total: 1220, iterations: 30) + 44.93 msec per iteration (total: 1348, iterations: 30) RESULT : tst_Loading::load():"row32": - 327.3 msec per iteration (total: 9820, iterations: 30) + 354.60 msec per iteration (total: 10638, iterations: 30) RESULT : tst_Loading::load():"row37": - 44.33 msec per iteration (total: 1330, iterations: 30) + 62.53 msec per iteration (total: 1876, iterations: 30) RESULT : tst_Loading::load():"row38": - 238.1 msec per iteration (total: 7145, iterations: 30) + 259.9 msec per iteration (total: 7798, iterations: 30) 154015 3 41029 zecke 2009-10-12 03:12:01 -0700 Created attachment 41029 Current loading speed regressions Current update. This is coming where everything is locally served. We are seeing 12 cases that seem to be slower than before. The problem is QBENCHMARK is not really good for statistics. If one loading took extremely long our whole result is screwed.. 220732 4 benjamin 2010-05-04 13:31:31 -0700 Do you remember what you are comparing against? I don't have regressions compared to 4.6.2. 283795 5 benjamin 2010-09-23 11:24:40 -0700 The benchmarks are now run regularily. Image loading in with 4.7 if faster than with 4.6. 41029 2009-10-12 03:12:01 -0700 2009-10-12 03:12:01 -0700 Current loading speed regressions result application/octet-stream 1980 zecke LS0tIG5ldy1sb2cucHJlLWltZwkyMDA5LTEwLTEyIDEyOjA2OjIzLjAwMDAwMDAwMCArMDIwMAor KysgbmV3LWxvZy5pbWcJMjAwOS0xMC0xMiAxMTo1Nzo0OS4wMDAwMDAwMDAgKzAyMDAKQEAgLTEs NDEgKzEsNDcgQEAKICoqKioqKioqKiBTdGFydCB0ZXN0aW5nIG9mIHRzdF9Mb2FkaW5nICoqKioq KioqKgogQ29uZmlnOiBVc2luZyBRVGVzdCBsaWJyYXJ5IDQuNy4wLCBRdCA0LjcuMAogUEFTUyAg IDogdHN0X0xvYWRpbmc6OmluaXRUZXN0Q2FzZSgpCi1RV0FSTiAgOiB0c3RfTG9hZGluZzo6bG9h ZChyb3cwMSkgUFJFIEltYWdlIFdvcmsKK1FXQVJOICA6IHRzdF9Mb2FkaW5nOjpsb2FkKHJvdzAx KSBJbWFnZSBEZWNvZGVyIGNoYW5nZXMKIFJFU1VMVCA6IHRzdF9Mb2FkaW5nOjpsb2FkKCk6InJv dzAzIjoKLSAgICAgNjIwLjc5IG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDE4NjI0LCBpdGVy YXRpb25zOiAzMCkKKyAgICAgNjYyLjIzIG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDE5ODY3 LCBpdGVyYXRpb25zOiAzMCkKIFJFU1VMVCA6IHRzdF9Mb2FkaW5nOjpsb2FkKCk6InJvdzA2IjoK LSAgICAgNDYzLjIzIG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDEzODk3LCBpdGVyYXRpb25z OiAzMCkKKyAgICAgNDgwLjAwIG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDE0NDAwLCBpdGVy YXRpb25zOiAzMCkKIFJFU1VMVCA6IHRzdF9Mb2FkaW5nOjpsb2FkKCk6InJvdzA5IjoKLSAgICAg NC40MyBtc2VjIHBlciBpdGVyYXRpb24gKHRvdGFsOiAxMzMsIGl0ZXJhdGlvbnM6IDMwKQorICAg ICA1LjE2IG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDE1NSwgaXRlcmF0aW9uczogMzApCiBS RVNVTFQgOiB0c3RfTG9hZGluZzo6bG9hZCgpOiJyb3cxNiI6Ci0gICAgIDY5NS4yMyBtc2VjIHBl ciBpdGVyYXRpb24gKHRvdGFsOiAyMDg1NywgaXRlcmF0aW9uczogMzApCisgICAgIDY5Ni4yMCBt c2VjIHBlciBpdGVyYXRpb24gKHRvdGFsOiAyMDg4NiwgaXRlcmF0aW9uczogMzApCiBSRVNVTFQg OiB0c3RfTG9hZGluZzo6bG9hZCgpOiJyb3cyNCI6Ci0gICAgIDMuNzAgbXNlYyBwZXIgaXRlcmF0 aW9uICh0b3RhbDogMTExLCBpdGVyYXRpb25zOiAzMCkKKyAgICAgNS40NiBtc2VjIHBlciBpdGVy YXRpb24gKHRvdGFsOiAxNjQsIGl0ZXJhdGlvbnM6IDMwKQogUkVTVUxUIDogdHN0X0xvYWRpbmc6 OmxvYWQoKToicm93MjYiOgotICAgICAxNzkuNiBtc2VjIHBlciBpdGVyYXRpb24gKHRvdGFsOiA1 MzkwLCBpdGVyYXRpb25zOiAzMCkKKyAgICAgMTc5LjggbXNlYyBwZXIgaXRlcmF0aW9uICh0b3Rh bDogNTM5NiwgaXRlcmF0aW9uczogMzApCiBSRVNVTFQgOiB0c3RfTG9hZGluZzo6bG9hZCgpOiJy b3cyOSI6Ci0gICAgIDQ5Ljc5IG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDE0OTQsIGl0ZXJh dGlvbnM6IDMwKQorICAgICA1NS4yMCBtc2VjIHBlciBpdGVyYXRpb24gKHRvdGFsOiAxNjU2LCBp dGVyYXRpb25zOiAzMCkKIFJFU1VMVCA6IHRzdF9Mb2FkaW5nOjpsb2FkKCk6InJvdzMwIjoKLSAg ICAgMy4zMyBtc2VjIHBlciBpdGVyYXRpb24gKHRvdGFsOiAxMDAsIGl0ZXJhdGlvbnM6IDMwKQor ICAgICA2LjA5IG1zZWMgcGVyIGl0ZXJhdGlvbiAodG90YWw6IDE4MywgaXRlcmF0aW9uczogMzAp CiBSRVNVTFQgOiB0c3RfTG9hZGluZzo6bG9hZCgpOiJyb3czMSI6Ci0gICAgIDI5LjggbXNlYyBw ZXIgaXRlcmF0aW9uICh0b3RhbDogODk3LCBpdGVyYXRpb25zOiAzMCkKKyAgICAgNDQuMDYgbXNl YyBwZXIgaXRlcmF0aW9uICh0b3RhbDogMTMyMiwgaXRlcmF0aW9uczogMzApCiBSRVNVTFQgOiB0 c3RfTG9hZGluZzo6bG9hZCgpOiJyb3czNCI6Ci0gICAgIDEsNzMxLjUgbXNlYyBwZXIgaXRlcmF0 aW9uICh0b3RhbDogNTE5NDUsIGl0ZXJhdGlvbnM6IDMwKQorICAgICAxLDc5NS41IG1zZWMgcGVy IGl0ZXJhdGlvbiAodG90YWw6IDUzODY3LCBpdGVyYXRpb25zOiAzMCkK