darin at apple.com
Thu Sep 11 11:06:24 PDT 2008
On Sep 11, 2008, at 10:57 AM, Josh Chia (谢任中) wrote:
> Is it possible for a "false positive" on the stack to prevent an
> object from being collected even after calling collect() multiple
Sure. That's always theoretically possible with conservative garbage
collection. But in practice this is unlikely and it is almost
certainly not a practical problem. One of the things we do in WebKit
is to make sure that garbage collection occurs when there is very
little on the stack, by collecting at the "top level" of the event
loop at key times (for example, when a window is closed).
In my experience so far, when diagnosing a problem where an object was
not collected, it has always been due to another cause.
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