speed up -emit-html in a release build by 6.5% by avoiding std::string.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49764 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 2 deletions

diff --git a/Driver/HTMLPrint.cpp b/Driver/HTMLPrint.cpp
index 981be851cf..165689d143 100644
--- a/Driver/HTMLPrint.cpp
+++ b/Driver/HTMLPrint.cpp
@@ -56,8 +56,10 @@ HTMLPrinter::~HTMLPrinter() {
   // Emit the HTML.
   
   if (const RewriteBuffer *RewriteBuf = R.getRewriteBufferFor(FileID)) {
-    std::string S(RewriteBuf->begin(), RewriteBuf->end());
-    printf("%s\n", S.c_str());
+    char *Buffer = (char*)malloc(RewriteBuf->size());
+    std::copy(RewriteBuf->begin(), RewriteBuf->end(), Buffer);
+    fwrite(Buffer, 1, RewriteBuf->size(), stdout);
+    free(Buffer);
   }
 }