130928 2014-03-29 11:14:23 -0700 LongSpider 3d-morph result check is inappropriate 2014-03-30 09:55:01 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 mark.lam mark.lam commit-queue fpizlo ggaren mhahnenberg mmirman msaboff oliver rniwa oldest_to_newest 995584 0 mark.lam 2014-03-29 11:14:23 -0700 The LongSpider expected value test in the 3d-morph component is incorrect. It should based on error tolerances instead. The existing test checks if the leading digit of a sum starts with "-1”. However, it turned out that the expected sum is in the order of -1.8735013540549517e-16 (i.e. very close to 0). The fix is to do an tolerance check on all the terms of the sum, as well as the total sum value instead. The tolerance is more lenient for the sum which accumulates error from the individual terms. 995585 1 mark.lam 2014-03-29 11:15:00 -0700 <rdar://problem/16465776> 995587 2 228111 mark.lam 2014-03-29 11:30:24 -0700 Created attachment 228111 the patch. 995624 3 228111 fpizlo 2014-03-29 21:38:59 -0700 Comment on attachment 228111 the patch. What is the running time of this test before and after your change? 995625 4 mark.lam 2014-03-29 21:57:37 -0700 (In reply to comment #3) > (From update of attachment 228111 [details]) > What is the running time of this test before and after your change? 3 runs of LongSpider 3d-morph each for before and after (x86_64 on a MBA): Before: 3d-morph 1252.2394+-34.5523 3d-morph 1253.3269+-55.5660 3d-morph 1264.6942+-91.1279 After: 3d-morph 1238.6026+-6.3175 3d-morph 1253.9030+-54.6123 3d-morph 1253.1157+-20.7673 I’d say it’s a wash. 995666 5 mark.lam 2014-03-30 09:55:01 -0700 Thanks for the review. 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