114824 2013-04-18 13:05:49 -0700 Garbage Collection of Typed Arrays Fails 2013-07-24 14:55:52 -0700 1 1 1 Unclassified WebKit JavaScriptCore 528+ (Nightly build) Mac (Intel) OS X 10.8 RESOLVED DUPLICATE 119064 P3 Major --- 0 amit webkit-unassigned feross fpizlo ggaren mhahnenberg oliver oldest_to_newest 878036 0 198755 amit 2013-04-18 13:05:49 -0700 Created attachment 198755 Example of typed array initialization and failure of garbage collector. Steps to reproduce the problem: 1. Define a function that initializes a typed array. 2. Execute the function. 3. Observe the typed array not being garbage collected when falling out of scope. The garbage collector should release memory from all variables defined in the function closure. Memory associated with the typed array is not released at any point during the life cycle of the web app. Memory is not released on tab close, but only on application close. Additionally, allocating a typed array seems to consume more memory than it should. For example, var arr = new Float32Array(268435456); allocates 1 gigabyte for array storage; however, WebKit consumes ~4 GB. 878783 1 oliver 2013-04-20 11:32:57 -0700 Check on a webkit nightly, my testing shows this as fixed 879161 2 amit 2013-04-22 08:20:51 -0700 Oliver, what type of tests did you conduct? This is still an open issue on my end (using WebKit nightly). If you open the Activity Monitor, you will see 500 MB allocated by "SafariForWebKitDevelopment Web Content". This memory is not released until the application closes. 883076 3 amit 2013-04-30 07:50:47 -0700 This bug also exists when initializing instances of ArrayBuffer. Webkit nightly does not release memory until the application closes. 911367 4 ap 2013-07-24 11:12:48 -0700 See also: bug 119049. 911437 5 fpizlo 2013-07-24 14:55:52 -0700 *** This bug has been marked as a duplicate of bug 119064 *** 198755 2013-04-18 13:05:49 -0700 2013-04-18 13:05:49 -0700 Example of typed array initialization and failure of garbage collector. index.html text/html 638 amit PGh0bWw+CjxoZWFkPgogIDx0aXRsZT5NZW1vcnkgVGVzdDwvdGl0bGU+CiAgPHNjcmlwdCB0eXBl PSd0ZXh0L2phdmFzY3JpcHQnPgogIChmdW5jdGlvbigpIHsKICAgIHZhciBBbGxvY2F0ZSwgYTsK ICAgIAogICAgQWxsb2NhdGUgPSAoZnVuY3Rpb24oKSB7CiAgICAgIAogICAgICBmdW5jdGlvbiBB bGxvY2F0ZSgpIHsKICAgICAgICB2YXIgaTsKICAgICAgICB0aGlzLmNodW5rcyA9IFtdOwogICAg ICAgIGZvciAoaSA9IDA7IGkgPCA5OyBpICs9IDEpIHsKICAgICAgICAgIAogICAgICAgICAgLy8g QWxsb2NhdGUgNTAgTUIgKDEzMTA3MjAwIGVsZW1lbnRzIG9mIDQgYnl0ZXMgZWFjaCkKICAgICAg ICAgIHRoaXMuY2h1bmtzLnB1c2gobmV3IEZsb2F0MzJBcnJheSgxMzEwNzIwMCkpOwogICAgICAg IH0KICAgICAgICAKICAgICAgICAvLyBBdCB0aGlzIHBvaW50IDEwMDAgTUIgaGF2ZSBiZWVuIGFs bG9jYXRlZC4KICAgICAgfQogICAgICAKICAgICAgcmV0dXJuIEFsbG9jYXRlOwogICAgICAKICAg IH0pKCk7CiAgICAKICAgIGEgPSBuZXcgQWxsb2NhdGUoKTsKICAgIAogIH0pLmNhbGwodGhpcyk7 CiAgPC9zY3JpcHQ+CjwvaGVhZD4KCjxib2R5PgogIDxoND5NZW1vcnkgVGVzdDwvaDQ+CjwvYm9k eT4KCjwvaHRtbD4=