qmake: use reserve to optimize memory allocation.

Change-Id: I6ace338512c24fd9dc11c767a28f0a63454076fa
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/qmake/library/qmakebuiltins.cpp b/qmake/library/qmakebuiltins.cpp
index 8f83cbd80b..7cac6cad71 100644
--- a/qmake/library/qmakebuiltins.cpp
+++ b/qmake/library/qmakebuiltins.cpp
@@ -145,6 +145,7 @@ void QMakeEvaluator::initFunctionStatics()
         { "shell_quote", E_SHELL_QUOTE },
         { "getenv", E_GETENV },
     };
+    statics.expands.reserve((int)(sizeof(expandInits)/sizeof(expandInits[0])));
     for (unsigned i = 0; i < sizeof(expandInits)/sizeof(expandInits[0]); ++i)
         statics.expands.insert(ProKey(expandInits[i].name), expandInits[i].func);
 
@@ -186,6 +187,7 @@ void QMakeEvaluator::initFunctionStatics()
         { "touch", T_TOUCH },
         { "cache", T_CACHE },
     };
+    statics.functions.reserve((int)(sizeof(testInits)/sizeof(testInits[0])));
     for (unsigned i = 0; i < sizeof(testInits)/sizeof(testInits[0]); ++i)
         statics.functions.insert(ProKey(testInits[i].name), testInits[i].func);
 }