[Patch] BaseTools: Add cache for UniToHexList

[Patch] BaseTools: Add cache for UniToHexList

[BobCF]

From: "bob.c.feng@intel.com" <bob.c.feng@intel.com>

https://bugzilla.tianocore.org/show_bug.cgi?id=1288

This patch is one of build tool performance improvement
series patches.

This patch is going to add cache for UniToHexList function.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: BobCF <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jaben Carsey <jaben.carsey@intel.com>
---
 BaseTools/Source/Python/AutoGen/UniClassObject.py | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/BaseTools/Source/Python/AutoGen/UniClassObject.py b/BaseTools/Source/Python/AutoGen/UniClassObject.py
index 384f31b165..e889af9e82 100644
--- a/BaseTools/Source/Python/AutoGen/UniClassObject.py
+++ b/BaseTools/Source/Python/AutoGen/UniClassObject.py
@@ -43,10 +43,11 @@ LF = u'\u000A'
 NULL = u'\u0000'
 TAB = u'\t'
 BACK_SLASH_PLACEHOLDER = u'\u0006'
 
 gIncludePattern = re.compile("^#include +[\"<]+([^\"< >]+)[>\"]+$", re.MULTILINE | re.UNICODE)
+UniTokenCache = dict()
 
 ## Convert a python unicode string to a normal string
 #
 # Convert a python unicode string to a normal string
 # UniToStr(u'I am a string') is 'I am a string'
@@ -66,16 +67,18 @@ def UniToStr(Uni):
 # @param Uni:    The python unicode string
 #
 # @retval List:  The formatted hex list
 #
 def UniToHexList(Uni):
-    List = []
-    for Item in Uni:
-        Temp = '%04X' % ord(Item)
-        List.append('0x' + Temp[2:4])
-        List.append('0x' + Temp[0:2])
-    return List
+    if Uni not in UniTokenCache:
+        List = []
+        for Item in Uni:
+            Temp = '%04X' % ord(Item)
+            List.append('0x' + Temp[2:4])
+            List.append('0x' + Temp[0:2])
+        UniTokenCache[Uni] = List
+    return UniTokenCache[Uni]
 
 LangConvTable = {'eng':'en', 'fra':'fr', \
                  'aar':'aa', 'abk':'ab', 'ave':'ae', 'afr':'af', 'aka':'ak', 'amh':'am', \
                  'arg':'an', 'ara':'ar', 'asm':'as', 'ava':'av', 'aym':'ay', 'aze':'az', \
                  'bak':'ba', 'bel':'be', 'bul':'bg', 'bih':'bh', 'bis':'bi', 'bam':'bm', \
-- 
2.19.1.windows.1