[LLVMdev] Recent compile time performance regressions

[Bruno Cardoso Lopes]

I was also able to reproduce this, I filled a PR with more info:
http://llvm.org/bugs/show_bug.cgi?id=20641

On Fri, Aug 1, 2014 at 8:11 PM, Yi Kong <kongy.dev at gmail.com> wrote:
> Hi Chandler,
>
> On an x86 system, for ToT LLVM:
>
> With "Remove support for LLVM runtime multithreading": 23.8788
> With patch reverted: 22.5229
>
> That's around 6% regression.
>
> Detailed JSON file is at http://paste.debian.net/113238,
> http://paste.debian.net/113239
>
> -Yi
>
> On 1 August 2014 21:56, Chandler Carruth <chandlerc at google.com> wrote:
>>
>> On Fri, Aug 1, 2014 at 1:47 PM, Yi Kong <kongy.dev at gmail.com> wrote:
>>>
>>> However the multithreading stuff is real regression and I'm able to
>>> reproduce same regression on my local build bots.
>>
>>
>> Can you share a preprocessed input and commandline which reproduces this
>> regression?
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-- 
Bruno Cardoso Lopes
http://www.brunocardoso.cc