Make --turbo-stats output more self-explanatory.

src/compilation-statistics.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <ostream>  // NOLINT(readability/streams)
 #include <vector>
 
 #include "src/base/platform/platform.h"
 #include "src/compilation-statistics.h"
 
@@ skipping 49 matching lines @@
                       const CompilationStatistics::BasicStats& total_stats) {
   const size_t kBufferSize = 128;
   char buffer[kBufferSize];
 
   double ms = stats.delta_.InMillisecondsF();
   double percent = stats.delta_.PercentOf(total_stats.delta_);
   double size_percent =
       static_cast<double>(stats.total_allocated_bytes_ * 100) /
       static_cast<double>(total_stats.total_allocated_bytes_);
   base::OS::SNPrintF(buffer, kBufferSize,
-                     "%28s %10.3f ms / %5.1f %%"
-                     "%10u total / %5.1f %% "
-                     "%10u max %10u abs_max",
+                     "%28s %10.3f (%5.1f%%)  "
+                     "%10u (%5.1f%%) %10u %10u",
                      name, ms, percent, stats.total_allocated_bytes_,
                      size_percent, stats.max_allocated_bytes_,
                      stats.absolute_max_allocated_bytes_);
 
   os << buffer;
   if (stats.function_name_.size() > 0) {
-    os << " : " << stats.function_name_.c_str();
+    os << "   " << stats.function_name_.c_str();
   }
   os << std::endl;
 }
 
 
 static void WriteFullLine(std::ostream& os) {
   os << "--------------------------------------------------------"
         "--------------------------------------------------------\n";
 }
 
 
 static void WriteHeader(std::ostream& os) {
   WriteFullLine(os);
-  os << "                             Turbofan timing results:\n";
+  os << "             Turbonfan phase        Time (ms)             "
+     << "          Space (bytes)             Function\n"
+     << "                                                         "
+     << "  Total          Max.     Abs. max.\n";
   WriteFullLine(os);
 }
 
 
 static void WritePhaseKindBreak(std::ostream& os) {
   os << "                             ---------------------------"
         "--------------------------------------------------------\n";
 }
 
 
@@ skipping 31 matching lines @@
     os << std::endl;
   }
   WriteFullLine(os);
   WriteLine(os, "totals", s.total_stats_, s.total_stats_);
 
   return os;
 }
 
 }  // namespace internal
 }  // namespace v8