On Aug 6, 2010, at 11:02 PM, Chris Lattner wrote:
>
> On Aug 6, 2010, at 5:06 AM, Douglas Gregor wrote:
>
>> Author: dgregor
>> Date: Fri Aug 6 07:06:13 2010
>> New Revision: 110440
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=110440&view=rev
>> Log:
>> Fix the #include search path when reading from stdin, from Jon Simons!
>> Fixes PR4897.
>
> hi Doug,
>
> Did you do any performance checking of this? HeaderSearch::LookupFile is
> incredibly performance sensitive for certain things (e.g. building cocoa.h
> pch file) and this patch probably just slowed it down by 3x.
Hrm, I did not do any performance testing. I'll run some numbers in the morning
and revert the patch if it causes an issue. Thanks for keeping an eye out; you
know I aim to make Clang slow.
- Doug
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