[Webkit-unassigned] [Bug 20964] New: Huge memory usage on Dromaeo test

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sat Sep 20 10:34:33 PDT 2008


https://bugs.webkit.org/show_bug.cgi?id=20964

           Summary: Huge memory usage on Dromaeo test
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
               URL: http://dromaeo.com
        OS/Version: Windows XP
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: spam_hole at shaw.ca


On Dromaeo, performing the test causes Safari's memory usage to climb through
the first few tests, increasing by around 80MB from 144 to 220 MB (this seems
normal), then suddenly increase by around 600MB to 830MB right before it starts
to run the "DOM Modification (Prototype)" test. The memory usage then stays
constant for the remainder of the test. Running the test a second time produces
barely any increase, but closing the Dromaeo tab does not cause the memory
usage to decrease.

The values quoted were derived from Process Explorer's "Private Bytes"
measurement.

For comparison, Firefox nightly never exceeds 300MB of usage throughout the
test, and ends up with the same memory usage as before the test. It rises
rapidly followed by rapid decrease, presumably due to periodic garbage
collection.


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