[Webkit-unassigned] [Bug 56356] New: JavaScriptCore needs a Generational Garbage Collector

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=56356

           Summary: JavaScriptCore needs a Generational Garbage Collector
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: Tam at SiuLung.com


As long-lived data intensive web applications become a norm, there are a common and legitimate use cases for having a large set of long-lived (JSValue) objects. This hurts the GC performance because such objects are constantly added to the conservative set during each Heap::reset() call, as triggered by lack of space during allocate() as well as collectAllGarbage(). In additional to slower overall performance, it also causes sluggishness if Heap::reset() calls happen too frequently.

A Generational GC allows more frequent collections of recently created (temporary) objects, allowing the long-lived objects stay untouched for a longer period of time.

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