Enable optimization of top-level code.

src/runtime-profiler.cc

Index: src/runtime-profiler.cc
===================================================================
--- src/runtime-profiler.cc	(revision 10686)
+++ src/runtime-profiler.cc	(working copy)
@@ -256,6 +256,16 @@
         function->shared()->set_profiler_ticks(ticks + 1);
       }
     } else {  // !FLAG_counting_profiler
+      // Only record top-level code on top of the execution stack and

[Jakob Kummerow, 2012/02/14 10:08:26]

It seems this entire addition is independent of the profiler implementation, so
please move it before the if/else block (i.e. before line 235).

[fschneider, 2012/02/14 13:03:11]

Done.

Good point. It should work with both profilers.

+      // avoid optimizing excessively large scripts since top-level code
+      // will be executed only once.
+      const int kMaxToplevelSourceSize = 10 * 1024;
+      if (function->shared()->is_toplevel()
+          && (frame_count > 1
+              || function->shared()->SourceSize() > kMaxToplevelSourceSize)) {
+        continue;
+      }
+
       samples[sample_count++] = function;
 
       int function_size = function->shared()->SourceSize();