78814 2012-02-16 07:50:23 -0800 Memory leaks in SVG filters 2014-03-02 10:12:15 -0800 1 1 1 Unclassified WebKit SVG 528+ (Nightly build) PC Windows 7 UNCONFIRMED P2 Normal --- 68469 0 mkorourk webkit-unassigned krit roger_fong thorton zimmermann oldest_to_newest 558187 0 mkorourk 2012-02-16 07:50:23 -0800 The attached HTML is a distilled example of far more complex HTML/JS which creates SVG content dynamically including filters. With such content we are experiencing the memory footprint of Chrome infinitely increasing. Within 15 minutes the footprint grows from 24MB to 120MB and continues upward from there. The same problem does not happen in Firefox. Note that in this simplified example, the filter is created but never attached to an SVG object. This was not the case in the original content and is part of the simplification of the original bug. To reproduce, just open the HTML file and then watch the memory footprint of Chrome via Task Manager. 558188 1 127379 mkorourk 2012-02-16 07:50:43 -0800 Created attachment 127379 Example file 559021 2 zimmermann 2012-02-17 01:05:37 -0800 Hrm, this is a bit awkward. I've changed your original testcase, to really only create a SVGFilterElement, not appending children, not using DOM/SVG DOM functionality, nothing. When breaking on SVGFilterElement constructor/destructor, it's obvious, that there's no memory leak. The SVGFilterElements are created, and then at some point they get garbage collected. Unfortunately I can't use Instruments, to trace memory-leaks/allocations, as attaching it makes the WebProcess crash (seems a general problem with Instruments, need to investigate...) valgrind also seems to crash on Lion, attaching to eg. DumpRenderTree (hmpf :(). Anyhow, my theory is that we're observing memory fragmentation here. Also new-run-webkit-tests --leaks doesn't detect any leaks, when running your testcase for 20s, which is also a good indicator, that we're not loosing memory. 559163 3 mkorourk 2012-02-17 06:44:58 -0800 Agreed that with only creating the SVGFilterElement the memory footprint does not continue increasing. Maybe the problem is with the underlying elements added to the filter not getting freed correctly? I tried some experiements with walking the filter child elements and explicitly removing them but this didn't seem to help. 559168 4 zimmermann 2012-02-17 07:02:23 -0800 (In reply to comment #3) > Agreed that with only creating the SVGFilterElement the memory footprint does not continue increasing. Maybe the problem is with the underlying elements added to the filter not getting freed correctly? I tried some experiements with walking the filter child elements and explicitly removing them but this didn't seem to help. Oh, my wording was wrong before. The memory footprint also increases when creating only the SVGFilterElement in my debug build - but that may be mem fragmentation.... 127379 2012-02-16 07:50:43 -0800 2012-02-16 07:50:43 -0800 Example file FilterLeak.html text/html 8437 mkorourk 77u/PCFkb2N0eXBlIGh0bWw+DQo8aHRtbD4NCjxoZWFkPg0KPG1ldGEgaHR0cC1lcXVpdj0iY29u dGVudC10eXBlIiBjb250ZW50PSJ0ZXh0L2h0bWw7IGNoYXJzZXQ9VVRGLTgiPg0KPG1ldGEgaHR0 cC1lcXVpdj0iWC1VQS1Db21wYXRpYmxlIiBjb250ZW50PSJJRT05Ij4NCjx0aXRsZT5VbnRpdGxl ZC0xPC90aXRsZT4NCjxzY3JpcHQgdHlwZT0idGV4dC9qYXZhc2NyaXB0IiBsYW5ndWFnZT0iSmF2 YVNjcmlwdCI+DQpqc29uT2JqZWN0ID0gew0KImZpbHRlcnMiOlsNCiAgIHsibmFtZSI6ImNvbG9y bWF0cml4IiwgInZhbHVlcyI6IjAuNjUgMCAwIDAgMCAwIDAuNjUgMCAwIDAgMCAwIDAuNjUgMCAw IDAgMCAwIDEgMCJ9LA0KICAgeyJuYW1lIjoiY29sb3JtYXRyaXgiLCAidmFsdWVzIjoiMS4zMDA1 IDAgMCAwIC0wLjMwMDUgMCAxLjMwMDUgMCAwIC0wLjMwMDUgMCAwIDEuMzAwNSAwIC0wLjMwMDUg MCAwIDAgMSAwIn0sDQogICB7Im5hbWUiOiJjb2xvcm1hdHJpeCIsICJ2YWx1ZXMiOiIxLjI1MDkg 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