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Issue 884308 link

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Issue metadata

Status: WontFix
Owner:
Closed: Oct 1
Cc:
EstimatedDays: ----
NextAction: ----
OS: ----
Pri: 2
Type: Bug-Regression



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894.8% regression in rendering.mobile at 591042:591110

Project Member Reported by npm@chromium.org, Sep 14

Issue description

See the link to graphs below.
 
All graphs for this bug:
  https://chromeperf.appspot.com/group_report?bug_id=884308

(For debugging:) Original alerts at time of bug-filing:
  https://chromeperf.appspot.com/group_report?sid=f5678750a88cecaa6ba8db538bc3d187333d01dddea45b57a442cc7d77bdb8fc


Bot(s) for this bug's original alert(s):

Android Nexus5 Perf

rendering.mobile - Benchmark documentation link:
  https://bit.ly/rendering-benchmarks
Cc: sunn...@chromium.org
Owner: sunn...@chromium.org
Status: Assigned (was: Untriaged)
📍 Found a significant difference after 1 commit.
https://pinpoint-dot-chromeperf.appspot.com/job/113485e3640000

Reland "Use GL_COMMANDS_ISSUED_CHROMIUM query for shared memory GpuMemoryBuffers" by sunnyps@chromium.org
https://chromium.googlesource.com/chromium/src/+/80d0a681332ba4c48d10e11f17d833eea89758ce
0.5085 → 3.042 (+2.533)

Understanding performance regressions:
  http://g.co/ChromePerformanceRegressions

Benchmark documentation link:
  https://bit.ly/rendering-benchmarks
Cc: ericrk@chromium.org
Status: WontFix (was: Assigned)
mean_pixels_approximated_tbmv2 increased slightly (0.3% to 1.1%), but mean_pixels_checkerboarded_tbmv2 decreased (51.6% to 45.9%).  That's a good thing because we're now rendering high res tiles and a few more low res tiles instead of checkerboarding due to the increase in throughput.

ericrk@ FYI the above improvement is on Nexus 5

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