[Tick processor] Add an option to the tick-processor to print the summary.

tools/tickprocessor.js

Index: tools/tickprocessor.js
diff --git a/tools/tickprocessor.js b/tools/tickprocessor.js
index d8575738553aa93f46116489312232d31acf8cf5..600d2eeb7b79dc3bcee56f183e0ec3c2347e83f6 100644
--- a/tools/tickprocessor.js
+++ b/tools/tickprocessor.js
@@ -156,7 +156,8 @@ function TickProcessor(
     range,
     sourceMap,
     timedRange,
-    pairwiseTimedRange) {
+    pairwiseTimedRange,
+    onlySummary) {
   LogReader.call(this, {
       'shared-library': { parsers: [null, parseInt, parseInt],
           processor: this.processSharedLibrary },
@@ -247,6 +248,7 @@ function TickProcessor(
 
   this.generation_ = 1;
   this.currentProducerProfile_ = null;
+  this.onlySummary_ = onlySummary;
 };
 inherits(TickProcessor, LogReader);
 
@@ -456,29 +458,30 @@ TickProcessor.prototype.printStatistics = function() {
   if (this.ignoreUnknown_) {
     totalTicks -= this.ticks_.unaccounted;
   }
+  var printAllTicks = !this.onlySummary_;
 
   // Count library ticks
   var flatViewNodes = flatView.head.children;
   var self = this;
 
   var libraryTicks = 0;
-  this.printHeader('Shared libraries');
+  if(printAllTicks) this.printHeader('Shared libraries');
   this.printEntries(flatViewNodes, totalTicks, null,
       function(name) { return self.isSharedLibrary(name); },
-      function(rec) { libraryTicks += rec.selfTime; });
+      function(rec) { libraryTicks += rec.selfTime; }, printAllTicks);
   var nonLibraryTicks = totalTicks - libraryTicks;
 
   var jsTicks = 0;
-  this.printHeader('JavaScript');
+  if(printAllTicks) this.printHeader('JavaScript');
   this.printEntries(flatViewNodes, totalTicks, nonLibraryTicks,
       function(name) { return self.isJsCode(name); },
-      function(rec) { jsTicks += rec.selfTime; });
+      function(rec) { jsTicks += rec.selfTime; }, printAllTicks);
 
   var cppTicks = 0;
-  this.printHeader('C++');
+  if(printAllTicks) this.printHeader('C++');
   this.printEntries(flatViewNodes, totalTicks, nonLibraryTicks,
       function(name) { return self.isCppCode(name); },
-      function(rec) { cppTicks += rec.selfTime; });
+      function(rec) { cppTicks += rec.selfTime; }, printAllTicks);
 
   this.printHeader('Summary');
   this.printLine('JavaScript', jsTicks, totalTicks, nonLibraryTicks);
@@ -490,25 +493,27 @@ TickProcessor.prototype.printStatistics = function() {
                    this.ticks_.total, null);
   }
 
-  print('\n [C++ entry points]:');
-  print('   ticks    cpp   total   name');
-  var c_entry_functions = this.profile_.getCEntryProfile();
-  var total_c_entry = c_entry_functions[0].ticks;
-  for (var i = 1; i < c_entry_functions.length; i++) {
-    c = c_entry_functions[i];
-    this.printLine(c.name, c.ticks, total_c_entry, totalTicks);
-  }
+  if(printAllTicks) {
+    print('\n [C++ entry points]:');
+    print('   ticks    cpp   total   name');
+    var c_entry_functions = this.profile_.getCEntryProfile();
+    var total_c_entry = c_entry_functions[0].ticks;
+    for (var i = 1; i < c_entry_functions.length; i++) {
+      c = c_entry_functions[i];
+      this.printLine(c.name, c.ticks, total_c_entry, totalTicks);
+    }
 
-  this.printHeavyProfHeader();
-  var heavyProfile = this.profile_.getBottomUpProfile();
-  var heavyView = this.viewBuilder_.buildView(heavyProfile);
-  // To show the same percentages as in the flat profile.
-  heavyView.head.totalTime = totalTicks;
-  // Sort by total time, desc, then by name, desc.
-  heavyView.sort(function(rec1, rec2) {
-      return rec2.totalTime - rec1.totalTime ||
-          (rec2.internalFuncName < rec1.internalFuncName ? -1 : 1); });
-  this.printHeavyProfile(heavyView.head.children);
+    this.printHeavyProfHeader();
+    var heavyProfile = this.profile_.getBottomUpProfile();
+    var heavyView = this.viewBuilder_.buildView(heavyProfile);
+    // To show the same percentages as in the flat profile.
+    heavyView.head.totalTime = totalTicks;
+    // Sort by total time, desc, then by name, desc.
+    heavyView.sort(function(rec1, rec2) {
+        return rec2.totalTime - rec1.totalTime ||
+            (rec2.internalFuncName < rec1.internalFuncName ? -1 : 1); });
+    this.printHeavyProfile(heavyView.head.children);
+  }
 };
 
 
@@ -600,13 +605,15 @@ TickProcessor.prototype.formatFunctionName = function(funcName) {
 };
 
 TickProcessor.prototype.printEntries = function(
-    profile, totalTicks, nonLibTicks, filterP, callback) {
+    profile, totalTicks, nonLibTicks, filterP, callback, printAllTicks) {
   var that = this;
   this.processProfile(profile, filterP, function (rec) {
     if (rec.selfTime == 0) return;
     callback(rec);
     var funcName = that.formatFunctionName(rec.internalFuncName);
-    that.printLine(funcName, rec.selfTime, totalTicks, nonLibTicks);
+    if(printAllTicks) {
+      that.printLine(funcName, rec.selfTime, totalTicks, nonLibTicks);
+    }
   });
 };
 
@@ -884,7 +891,9 @@ function ArgumentsProcessor(args) {
     '--timed-range': ['timedRange', true,
         'Ignore ticks before first and after last Date.now() call'],
     '--pairwise-timed-range': ['pairwiseTimedRange', true,
-        'Ignore ticks outside pairs of Date.now() calls']
+        'Ignore ticks outside pairs of Date.now() calls'],
+    '--only-summary': ['onlySummary', true,
+        'Print only tick summary, exclude other information']
   };
   this.argsDispatch_['--js'] = this.argsDispatch_['-j'];
   this.argsDispatch_['--gc'] = this.argsDispatch_['-g'];
@@ -908,7 +917,8 @@ ArgumentsProcessor.DEFAULTS = {
   range: 'auto,auto',
   distortion: 0,
   timedRange: false,
-  pairwiseTimedRange: false
+  pairwiseTimedRange: false,
+  onlySummary: false
 };