Add a precompiled RegExp for 4 hex chars.

Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
---
 BaseTools/Source/Python/Common/GlobalData.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/BaseTools/Source/Python/Common/GlobalData.py b/BaseTools/Source/Python/Common/GlobalData.py
index 4d0833a55b52..972ae3e2253c 100644
--- a/BaseTools/Source/Python/Common/GlobalData.py
+++ b/BaseTools/Source/Python/Common/GlobalData.py
@@ -59,6 +59,8 @@ _GuidPattern = r"{Hex}{8}-{Hex}{4}-{Hex}{4}-{Hex}{4}-{Hex}{12}".format(Hex=_HexC
 gGuidPattern = re.compile(r'{}'.format(_GuidPattern))
 gGuidPatternEnd = re.compile(r'{}$'.format(_GuidPattern))
 
+g4HexChar = re.compile(r'{}{4}'.format(_HexChar))
+
 #
 # A global variable for whether current build in AutoGen phase or not.
 #
-- 
2.16.2.windows.1

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