Re: [edk2-staging/BaseToolsOpt]: Add new branch BaseToolsOpt

["Gao, Liming" <liming.gao@intel.com>]

Laszlo:
  Yes. We will analyze cProfile data and optimize the parse logic. 

Thanks
Liming
>-----Original Message-----
>From: Laszlo Ersek [mailto:lersek@redhat.com]
>Sent: Wednesday, May 31, 2017 7:21 PM
>To: Gao, Liming <liming.gao@intel.com>; edk2-devel@lists.01.org
>Cc: Kinney, Michael D <michael.d.kinney@intel.com>
>Subject: Re: [edk2] [edk2-staging/BaseToolsOpt]: Add new branch
>BaseToolsOpt
>
>On 05/31/17 06:57, Gao, Liming wrote:
>> Hi All,
>>   I would like to add new branch BaseToolsOpt in edk2-staging for BaseTools
>build performance optimization. Here is its Readme.MD. Please help review.
>>
>> Readme.MD:
>> This branch is used to optimize BaseTools build performance. It bases on
>edk2 repo UDK2017 branch.
>>
>> The branch owner:
>> Gao, Liming <liming.gao@intel.com>
>> Zhu, Yonghong <yonghong.zhu@intel.com>
>>
>> ## Feature Introduction
>> BaseTools supports more and more features. They will take more build time.
>To reduce build overhead, some points have been
>> identified to be optimized. POC code will be added in this branch for
>evaluation.
>> 1) Enable the multiple thread in GenFds phase.
>> 2) Support to merge multiple drivers into one. It should save the link time.
>But, it doesn't save much in the multiple build.
>>    Besides, this feature can save the image size when the image is not
>compressed, such as PEI images.
>> 3) Reduce the extra copy actions in build process.
>> 4) Analyze cProfile data and enhance the parser logic.
>https://bugzilla.tianocore.org/show_bug.cgi?id=42
>>
>> ## Timeline
>> Target for 2017 Q3
>>
>> ### NOTES
>> Most changes in this branch are BaseTools. To apply them, user needs to run
>BaseTools
>> from sources. In Linux, BaseTools run from source. In Windows, BaseTools
>can run from source. And, Reconfig option is also
>> required to apply new config settings in BaseTools\Conf. The step is like
>below:
>> 1. enter into edk2
>> 2. set PYTHON_HOME=C:\Python27
>> 3. type edksetup.bat --nt32 Reconfig
>> 4. nmake -f BaseTools\Makefile
>> 5. type build command to build platform.
>
>This looks very valuable to me.
>
>Another spot where "build" spends quite a bit of time is the initial
>metadata parsing. Perhaps there are some gains to be made there. I guess
>the profile data referenced under point (4) above, and in BZ#42, will
>help analyze that step.
>
>Thanks!
>Laszlo