Optimize trivial regexp disjunctions

src/jsregexp.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_JSREGEXP_H_
 #define V8_JSREGEXP_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 
@@ skipping 194 matching lines @@
   static ByteArray* IrregexpByteCode(FixedArray* re, bool is_one_byte);
   static Code* IrregexpNativeCode(FixedArray* re, bool is_one_byte);
 
   // Limit the space regexps take up on the heap.  In order to limit this we
   // would like to keep track of the amount of regexp code on the heap.  This
   // is not tracked, however.  As a conservative approximation we track the
   // total regexp code compiled including code that has subsequently been freed
   // and the total executable memory at any point.
   static const int kRegExpExecutableMemoryLimit = 16 * MB;
   static const int kRegExpCompiledLimit = 1 * MB;
-  static const int kRegExpTooLargeToOptimize = 10 * KB;
+  static const int kRegExpTooLargeToOptimize = 20 * KB;
 
  private:
   static bool CompileIrregexp(Handle<JSRegExp> re,
                               Handle<String> sample_subject, bool is_one_byte);
   static inline bool EnsureCompiledIrregexp(Handle<JSRegExp> re,
                                             Handle<String> sample_subject,
                                             bool is_one_byte);
 };
 
 
@@ skipping 1429 matching lines @@
 
   static bool TooMuchRegExpCode(Handle<String> pattern);
 
   static void DotPrint(const char* label, RegExpNode* node, bool ignore_case);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_JSREGEXP_H_