Johan Tibell wrote:
On Wed, Jan 14, 2009 at 1:14 PM, Simon Marlow <marlo...@gmail.com> wrote:
By popular demand, GHC 6.10.2 will support finalizers that are actually
guaranteed to run, and run promptly. There aren't any API changes: this
happens for finalizers created using newForeignPtr as normal.
Does this effect GC performance even if you don't use finalizers?
My knowledge of how finalizers affect GC performance is limited but
now and then I stumble on some Java article (e.g. [1]) that claims
that they can slow things down. That's no problem if there's no
additional cost added to code which doesn't use finalizers.
Yes, having lots of finalizers could affect GC performance, but that hasn't
changed. There are things we could do to speed it up, if it became a
serious bottleneck - for example, we currently look at all the weak
pointers on every GC, but we could separate them by generation like we do
for threads.
Cheers,
Simon
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