Nick Craig-Wood nick at craig-wood.com
Thu Mar 2 15:54:38 CET 2006

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On Thu, Mar 02, 2006 at 01:43:00AM -0600, Tim Peters wrote:
> I'm optimistic, because the new test compares a quantity already being
> tested by the macro, a second time against 0, and it's hard to get
> cheaper than that.  However, the new branch isn't predictable, so who
> knows?

When compiling with gcc at least you could give the compiler a hint,
eg

  http://kerneltrap.org/node/4705

> For example, in a release build on WinXP, VM size is about 48MB at the
> "full" prompt, and drops to 3MB at the "empty" prompt.  In the trunk
> (without this patch), VM size falls relatively little from what it is
> at the "full" prompt

Excellent work!

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick

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