Increase optimziation counter threshold to 3000, improves dart2js preformance.

runtime/vm/code_generator.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/code_generator.h"
 
 #include "vm/assembler_macros.h"
 #include "vm/ast.h"
 #include "vm/bigint_operations.h"
 #include "vm/code_patcher.h"
@@ skipping 21 matching lines @@
     " native entries.");
 DEFINE_FLAG(bool, inline_cache, true, "Enable inline caches");
 DEFINE_FLAG(bool, trace_deoptimization, false, "Trace deoptimization");
 DEFINE_FLAG(bool, trace_deoptimization_verbose, false,
     "Trace deoptimization verbose");
 DEFINE_FLAG(bool, trace_ic, false, "Trace IC handling");
 DEFINE_FLAG(bool, trace_ic_miss_in_optimized, false,
     "Trace IC miss in optimized code");
 DEFINE_FLAG(bool, trace_patching, false, "Trace patching of code.");
 DEFINE_FLAG(bool, trace_runtime_calls, false, "Trace runtime calls");
-DEFINE_FLAG(int, optimization_counter_threshold, 2000,
+DEFINE_FLAG(int, optimization_counter_threshold, 3000,
     "Function's usage-counter value before it is optimized, -1 means never");
 DECLARE_FLAG(bool, enable_type_checks);
 DECLARE_FLAG(bool, trace_type_checks);
 DECLARE_FLAG(bool, report_usage_count);
 DECLARE_FLAG(int, deoptimization_counter_threshold);
 DEFINE_FLAG(charp, optimization_filter, NULL, "Optimize only named function");
 DEFINE_FLAG(bool, trace_failed_optimization_attempts, false,
     "Traces all failed optimization attempts");
 DEFINE_FLAG(bool, trace_optimized_ic_calls, false,
     "Trace IC calls in optimized code.");
@@ skipping 1895 matching lines @@
   Isolate* isolate = Isolate::Current();
   StackZone zone(isolate);
   HANDLESCOPE(isolate);
   const Bigint& big_left = Bigint::Handle(left);
   const Bigint& big_right = Bigint::Handle(right);
   return BigintOperations::Compare(big_left, big_right);
 }
 END_LEAF_RUNTIME_ENTRY
 
 }  // namespace dart