Canvas performance is bad for very simple graph drawing
Reported by
jonas.me...@gmail.com,
Jun 19 2017
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Issue descriptionUserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.104 Safari/537.36 Steps to reproduce the problem: 1. Load attached file in chrome 2. Notice framerate is ~30fps [test hardware:(https://support.apple.com/kb/SP658?locale=en_US)] 3. Profile with the chrome performance tools: Observe javascript execution is taking very little time, and most of the time is spent inside canvas functions What is the expected behavior? It should be possible to run such a simple program at 60fps. What went wrong? -Stalling inside random calls from javascript -No way to make the code faster -_very_ simple canvas example on a relatively fast laptop is struggling to maintain even 30fps Did this work before? N/A Does this work in other browsers? N/A Chrome version: 59.0.3071.104 Channel: stable OS Version: OS X 10.12.3 Flash Version: Shockwave Flash 26.0 r0 Safari runs this at ~50fps, Firefox at ~30(same as chrome).
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Jun 22 2017
Tested the issue on Mac OS 10.12.5 using chrome M59 #59.0.3071.109 and followed below steps to reproduce the issue : 1. Launched chrome and loaded given html file . 2. Observed fps meter and profiled the performance using prformance in dev tools and it took 70-90 secs. Attached screencast for reference. @jonas.meyer-- Could you please check attached screencast and confirm us if we have missed any steps in reproducing the issue. Thanks!
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Jun 22 2017
Hi @hdodda@chromium.org, I think you might've forgotten to attach the screencast? I dont see it at least..
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Jun 22 2017
Thank you for providing more feedback. Adding requester "hdodda@chromium.org" to the cc list and removing "Needs-Feedback" label. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jun 24 2017
The repro looks correct, however your Frame Rate is much higher than mine - Maybe youre running on different hardware? As I mentioned before I get 30fps on the MBP I linked to up top. Also be aware that the size of the window significantly affects the FPS Count (in your video you use half of the screen for the profiler)
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Jun 24 2017
Thank you for providing more feedback. Adding requester "hdodda@chromium.org" to the cc list and removing "Needs-Feedback" label. For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot
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Jun 27 2017
Note to self: on Retina MBP 2012, frame rate improves by 2-3X if the verb limit in the tessellating path renderer is raised to 1500. This is higher than we planned to raise it, but this is an interesting test case nonetheless. (Integrated Discrete: 50FPS -> 150FPS, Integrated 41FPS -> 84FPS).
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Jun 27 2017
s/Integrated Discrete/Discrete/
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Jul 4 2017
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Comment 1 by ranjitkan@chromium.org
, Jun 19 2017