- Improve marking performance by pre-marking RawInstructions objects,

runtime/vm/object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/object.h"
 
 #include "platform/assert.h"
 #include "vm/assembler.h"
 #include "vm/bigint_operations.h"
 #include "vm/bootstrap.h"
@@ skipping 5474 matching lines @@
 
 RawInstructions* Instructions::New(intptr_t size) {
   const Class& instructions_class = Class::Handle(Object::instructions_class());
   Instructions& result = Instructions::Handle();
   {
     uword aligned_size = Instructions::InstanceSize(size);
     RawObject* raw = Object::Allocate(instructions_class,
                                       aligned_size,
                                       Heap::kExecutable);
     NoGCScope no_gc;
+    // TODO(iposva): Remove premarking once old and code spaces are merged.
+    raw->SetMarkBit();
     result ^= raw;
     result.set_size(size);
   }
   return result.raw();
 }
 
 
 const char* Instructions::ToCString() const {
   return "Instructions";
 }
@@ skipping 3732 matching lines @@
   const String& str = String::Handle(pattern());
   const char* format = "JSRegExp: pattern=%s flags=%s";
   intptr_t len = OS::SNPrint(NULL, 0, format, str.ToCString(), Flags());
   char* chars = reinterpret_cast<char*>(
       Isolate::Current()->current_zone()->Allocate(len + 1));
   OS::SNPrint(chars, (len + 1), format, str.ToCString(), Flags());
   return chars;
 }
 
 }  // namespace dart