Re: Garbage Collection Performance Hit
Re: Garbage Collection Performance Hit
- Subject: Re: Garbage Collection Performance Hit
- From: Bill Bumgarner <email@hidden>
- Date: Wed, 31 Oct 2007 12:58:31 -0700
On Oct 31, 2007, at 12:19 PM, Adam R. Maxwell wrote:
On Wednesday, October 31, 2007, at 12:06PM, "Michael Watson" <email@hidden
> wrote:
What have you done to make you believe this, out of curiosity? (I'd
love to have an example of things to look for in future profiling, if
you've got some sort of data here.)
I've sampled Xcode when the editor beachballs while I'm typing code;
it's like using an ssh connection over a 1200 baud modem :). If
you're interested in actual samples, e-mail me offlist. In the case
of Xcode it also seems related to project and class file size, and I
can point you to a couple of open source projects that are now
painful to work with.
The collector thread being active means that the collector believes
there are objects to collect, not that it is doing unnecessary work.
It may be that Xcode is doing any number of things -- indexing,
dependency checks, SCM operations, documentation update, etc.. -- on
other threads that are allocating a significant number of objects and,
thus, the collector is busy trying to reap said objects.
b.bum
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