Add more detailed timers of the various compilation passes. The...

src/compiler.cc

 // Copyright 2009 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 34 matching lines @@
                              bool is_eval) {
   ASSERT(literal != NULL);
 
   // Rewrite the AST by introducing .result assignments where needed.
   if (!Rewriter::Process(literal) || !AnalyzeVariableUsage(literal)) {
     // Signal a stack overflow by returning a null handle.  The stack
     // overflow exception will be thrown by the caller.
     return Handle<Code>::null();
   }
 
-  // Compute top scope and allocate variables. For lazy compilation
-  // the top scope only contains the single lazily compiled function,
-  // so this doesn't re-allocate variables repeatedly.
-  Scope* top = literal->scope();
-  while (top->outer_scope() != NULL) top = top->outer_scope();
-  top->AllocateVariables(context);
+  {
+    // Compute top scope and allocate variables. For lazy compilation
+    // the top scope only contains the single lazily compiled function,
+    // so this doesn't re-allocate variables repeatedly.
+    HistogramTimerScope timer(&Counters::variable_allocation);
+    Scope* top = literal->scope();
+    while (top->outer_scope() != NULL) top = top->outer_scope();
+    top->AllocateVariables(context);
+  }
 
 #ifdef DEBUG
   if (Bootstrapper::IsActive() ?
       FLAG_print_builtin_scopes :
       FLAG_print_scopes) {
     literal->scope()->Print();
   }
 #endif
 
   // Optimize the AST.
@@ skipping 312 matching lines @@
   // Set the expected number of properties for instances.
   SetExpectedNofPropertiesFromEstimate(shared, lit->expected_property_count());
 
   // Check the function has compiled code.
   ASSERT(shared->is_compiled());
   return true;
 }
 
 
 } }  // namespace v8::internal