Status: Untriaged Owner: ---- CC: [email protected], [email protected], [email protected] Labels: Type-Bug Pri-2 OS-All Area-Infrastructure Size-Medium
New issue 21398 by [email protected]: New Tab UI performance graphs aren't useful http://code.google.com/p/chromium/issues/detail?id=21398 Here's 8 weeks worth of New Tab UI performance graphing from the Mac: http://build.chromium.org/buildbot/perf/mac-release-10.5/new-tab-ui- cold/report.html?history=1500 It's fairly flat. There's a small amount of movement in there, so it's measuring something, but it's not measuring new tab UI time. I recently found that the new tab UI was taking between 2 and 3 seconds, just for the time between when the renderer made its first resource request and when all of the resources for the NTP were satisfied and available in the renderer. With delays like that, it's preposterous for the test results to have been in 500ms that entire time. When I recently fixed that performance nightmare, the New Tab UI performance graphs didn't budge. Here we are on Linux: http://build.chromium.org/buildbot/perf/linux-release-hardy/new-tab- ui-cold/report.html?history=1500 Again, no real movement on that test. My changes should have had some impact on Linux too. None measurable, according to these graphs, though. The Mac and Linux graphs do show some larger changes if you go back further, but I don't believe that the actual performance has been as flat as the graphs indicate, and I don't believe that the Mac was ever in the 500ms neighborhood until last week. The Windows graphs do show more movement: http://build.chromium.org/buildbot/perf/xp-release-single-core/new- tab-ui-cold/report.html?history=1500 http://build.chromium.org/buildbot/perf/xp-release-dual-core/new- tab-ui-cold/report.html?history=1500 http://build.chromium.org/buildbot/perf/vista-release-single-core/new- tab-ui-cold/report.html?history=1500 http://build.chromium.org/buildbot/perf/vista-release-dual-core/new- tab-ui-cold/report.html?history=1500 Outside of XP Dual, the Windows results are in the 700-800 ms range. I don't believe that Mac and Linux are that much faster than Windows on New Tab UI performance. The Windows numbers almost seem plausible (speaking without having ever used Chrome on a single-core system), although Vista Dual feels too high. Something is very wrong here. -- You received this message because you are listed in the owner or CC fields of this issue, or because you starred this issue. You may adjust your issue notification preferences at: http://code.google.com/hosting/settings --~--~---------~--~----~------------~-------~--~----~ Automated mail from issue updates at http://crbug.com/ Subscription options: http://groups.google.com/group/chromium-bugs -~----------~----~----~----~------~----~------~--~---
