Regexp: Improve the speed that we scan for an initial point where a non-anchored

test/cctest/test-regexp.cc

 // Copyright 2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 486 matching lines @@
 static RegExpNode* Compile(const char* input, bool multiline, bool is_ascii) {
   V8::Initialize(NULL);
   Isolate* isolate = Isolate::Current();
   FlatStringReader reader(isolate, CStrVector(input));
   RegExpCompileData compile_data;
   if (!v8::internal::RegExpParser::ParseRegExp(&reader, multiline,
                                                &compile_data))
     return NULL;
   Handle<String> pattern = isolate->factory()->
       NewStringFromUtf8(CStrVector(input));
-  RegExpEngine::Compile(&compile_data, false, multiline, pattern, is_ascii);
+  Handle<String> sample_subject =
+      isolate->factory()->NewStringFromUtf8(CStrVector(""));
+  RegExpEngine::Compile(
+      &compile_data, false, multiline, pattern, sample_subject, is_ascii);
   return compile_data.node;
 }
 
 
 static void Execute(const char* input,
                     bool multiline,
                     bool is_ascii,
                     bool dot_output = false) {
   v8::HandleScope scope;
   ZoneScope zone_scope(Isolate::Current(), DELETE_ON_EXIT);
@@ skipping 1308 matching lines @@
     bool in_second = CharacterInSet(&l2, i);
     CHECK((in_first || in_second) == CharacterInSet(&all, i));
   }
 }
 
 
 TEST(Graph) {
   V8::Initialize(NULL);
   Execute("\\b\\w+\\b", false, true, true);
 }