[Patch 0/3] Clean BaseTools code for build performance

["Bob Feng" <bob.c.feng@intel.com>]

REF:
1 https://bugzilla.tianocore.org/show_bug.cgi?id=2102
2 https://bugzilla.tianocore.org/show_bug.cgi?id=2101
3 https://bugzilla.tianocore.org/show_bug.cgi?id=2183

By profiling build Ovmf with cProfile:

1. re.findall time reduced:
after patch:
0.017  {method 'findall' of '_sre.SRE_Pattern' objects}
original:
0.212  {method 'findall' of '_sre.SRE_Pattern' objects}

2. times of call of os.stat is reduced
after patch:
33307    {built-in method nt.stat}
orignial:
33774    {built-in method nt.stat}

3. rename call is removed.
original:
2.165 {built-in method nt.rename}

Feng, Bob C (3):
  BaseTools: Improve GetDependencyList function
  BaseTools: remove unnecessary calls of os.exist
  BaseTools:Remove the unnecessary operation of renaming a file.

 .../Source/Python/AutoGen/AutoGenWorker.py    |  7 +-
 BaseTools/Source/Python/AutoGen/GenC.py       | 97 ++++++++++---------
 BaseTools/Source/Python/AutoGen/GenMake.py    | 35 ++++---
 .../Source/Python/AutoGen/PlatformAutoGen.py  |  8 +-
 .../Source/Python/AutoGen/UniClassObject.py   |  5 +-
 BaseTools/Source/Python/Common/Misc.py        | 23 +----
 6 files changed, 82 insertions(+), 93 deletions(-)

-- 
2.20.1.windows.1