NEW 212214
Serious canvas memory leak in Safari (both iOS / macOS) 
https://bugs.webkit.org/show_bug.cgi?id=212214
Summary Serious canvas memory leak in Safari (both iOS / macOS)
kaz.namba
Reported 2020-05-21 08:52:16 PDT
Created attachment 399958 [details] An HTML code to reproduce Safari crashes because of memory leak. This issue occurs both on iOS and macOS. I attached the reproduction code, also put it on the Gist. https://gist.github.com/kulikala/039d7c94f46ee860f1f9e2714104cb90 Trigger condition is same with the following issue: https://bugs.webkit.org/show_bug.cgi?id=134355 > ctx.drawImage(anotherCanvas, clipX, clipY, clipW, clipH, x, y, w, h) --> memory leak. > ctx.drawImage(anotherCanvas, x, y, w, h) --> no memory leak. There's a slight difference with my reproduction code: the image source is switched to HTMLVideoElement. I confirmed this memory leak via Web Inspector's Timelines tab. Page category of memory instrument keeps growing and reaches 3GB (my MacBook Pro has 16GB memory).
Attachments
An HTML code to reproduce (1.94 KB, text/html)
2020-05-21 08:52 PDT, kaz.namba 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Alexey Proskuryakov
Comment 1 2020-05-21 10:53:46 PDT
Safari kills the page for using too much memory in a few seconds.
Radar WebKit Bug Importer
Comment 2 2020-05-21 10:53:57 PDT
<rdar://problem/63500557>
Simon Fraser (smfr)
Comment 3 2020-05-21 13:31:15 PDT
What macOS/iOS versions are you reproducing this on?
kaz.namba
Comment 4 2020-05-21 13:46:12 PDT
I confirmed the reproduction on macOS: Catalina v10.15.4 Safari: v13.1 (15609.1.20.111.8) iOS: v13.5
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