Enhancing profiling data processing code with functionality needed for the Dev Tools Profiler.

tools/tickprocessor.js

 // 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 255 matching lines @@
         this.ticks_.excluded + ' excluded).');
 
   if (this.ticks_.total == 0) return;
 
   // Print the unknown ticks percentage if they are not ignored.
   if (!this.ignoreUnknown_ && this.ticks_.unaccounted > 0) {
     this.printHeader('Unknown');
     this.printCounter(this.ticks_.unaccounted, this.ticks_.total);
   }
 
+  // Disable initialization of 'funcName', 'url', 'lineNumber' as
+  // we don't use it and it just wastes time.
+  devtools.profiler.ProfileView.Node.prototype.initFuncInfo = function() {};
+
   var flatProfile = this.profile_.getFlatProfile();
   var flatView = this.viewBuilder_.buildView(flatProfile);
   // Sort by self time, desc, then by name, desc.
   flatView.sort(function(rec1, rec2) {
       return rec2.selfTime - rec1.selfTime ||
           (rec2.internalFuncName < rec1.internalFuncName ? -1 : 1); });
   var totalTicks = this.ticks_.total;
   if (this.ignoreUnknown_) {
     totalTicks -= this.ticks_.unaccounted;
   }
@@ skipping 68 matching lines @@
 TickProcessor.prototype.printCounter = function(ticksCount, totalTicksCount) {
   var pct = ticksCount * 100.0 / totalTicksCount;
   print('  ' + padLeft(ticksCount, 5) + '  ' + padLeft(pct.toFixed(1), 5) + '%');
 };
 
 
 TickProcessor.prototype.processProfile = function(
     profile, filterP, func) {
   for (var i = 0, n = profile.length; i < n; ++i) {
     var rec = profile[i];
-    // An empty record corresponds to a tree root.
-    if (!rec.internalFuncName || !filterP(rec.internalFuncName)) {
+    if (!filterP(rec.internalFuncName)) {
       continue;
     }
     func(rec);
   }
 };
 
 
 TickProcessor.prototype.printEntries = function(
     profile, nonLibTicks, filterP) {
   this.processProfile(profile, filterP, function (rec) {
@@ skipping 235 matching lines @@
 
 var params = processArguments(arguments);
 var tickProcessor = new TickProcessor(
     params.platform == 'unix' ? new UnixCppEntriesProvider() :
         new WindowsCppEntriesProvider(),
     params.separateIc,
     params.ignoreUnknown,
     params.stateFilter);
 tickProcessor.processLogFile(params.logFileName);
 tickProcessor.printStatistics();