[LLVMdev] Recent compile time performance regressions

[Yi Kong]

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?