Add --parse-all option in order to benchmark and measure the scanner/parser performance.

runtime/vm/precompiler.cc

 // Copyright (c) 2015, 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/precompiler.h"
 
 #include "vm/aot_optimizer.h"
 #include "vm/assembler.h"
 #include "vm/ast_printer.h"
 #include "vm/branch_optimizer.h"
@@ skipping 1179 matching lines @@
   return Object::null();
 }
 
 
 RawObject* Precompiler::ExecuteOnce(SequenceNode* fragment) {
   LongJumpScope jump;
   if (setjmp(*jump.Set()) == 0) {
     Thread* const thread = Thread::Current();
     if (FLAG_support_ast_printer && FLAG_trace_compiler) {
       THR_Print("compiling expression: ");
-      AstPrinter::PrintNode(fragment);
+      AstPrinter ast_printer;
+      ast_printer.PrintNode(fragment);
     }
 
     // Create a dummy function object for the code generator.
     // The function needs to be associated with a named Class: the interface
     // Function fits the bill.
     const char* kEvalConst = "eval_const";
     const Function& func = Function::ZoneHandle(Function::New(
         String::Handle(Symbols::New(thread, kEvalConst)),
         RawFunction::kRegularFunction,
         true,  // static function
@@ skipping 2103 matching lines @@
 
   ASSERT(FLAG_precompiled_mode);
   const bool optimized = function.IsOptimizable();  // False for natives.
   DartPrecompilationPipeline pipeline(zone, field_type_map);
   return PrecompileFunctionHelper(&pipeline, function, optimized);
 }
 
 #endif  // DART_PRECOMPILER
 
 }  // namespace dart