commit e9c36b34efb7460f59c6766e526c9b0de8da70b3
author Vladimir Marko <vmarko@google.com> Thu Nov 21 15:49:16 2013 +0000
committer Vladimir Marko <vmarko@google.com> Thu Nov 21 17:24:18 2013 +0000
tree 5694423b3debc675764f6364785090a6956bc371
parent 3e669dba962dc5291de0642eb46ede107be4e5a4

Avoid some string allocations.

Also avoid building a string one character at a time.

Change-Id: I3db26226c620a730b95637d5bfc23e2d4715cfb9

runtime/hprof/hprof.cc

diff --git a/runtime/hprof/hprof.cc b/runtime/hprof/hprof.cc
index 67620a0..9f899e8 100644
--- a/runtime/hprof/hprof.cc
+++ b/runtime/hprof/hprof.cc
@@ -537,7 +537,7 @@
     HprofRecord* rec = &current_record_;
 
     for (StringMapIterator it = strings_.begin(); it != strings_.end(); ++it) {
-      std::string string((*it).first);
+      const std::string& string = (*it).first;
       size_t id = (*it).second;
 
       int err = current_record_.StartNewRecord(header_fp_, HPROF_TAG_STRING, HPROF_TIME);