nanobench: add a cute bar chart

bench/nanobench.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include <ctype.h>
 
 #include "Benchmark.h"
@@ skipping 220 matching lines @@
     SkCommandLineFlags::Parse(argc, argv);
 
     const double overhead = estimate_timer_overhead();
     SkAutoTMalloc<double> samples(FLAGS_samples);
 
     if (FLAGS_verbose) {
         // No header.
     } else if (FLAGS_quiet) {
         SkDebugf("median\tbench\tconfig\n");
     } else {
-        SkDebugf("loops\tmin\tmedian\tmean\tmax\tstddev\tconfig\tbench\n");
+        SkDebugf("loops\tmin\tmedian\tmean\tmax\tstddev\tsamples\tconfig\tbench\n");
     }
 
     for (const BenchRegistry* r = BenchRegistry::Head(); r != NULL; r = r->next()) {
         SkAutoTDelete<Benchmark> bench(r->factory()(NULL));
         if (SkCommandLineFlags::ShouldSkip(FLAGS_match, bench->getName())) {
             continue;
         }
 
         SkTDArray<Target*> targets;
         create_targets(bench.get(), &targets);
@@ skipping 18 matching lines @@
                     SkDebugf("%s  ", humanize(samples[i]).c_str());
                 }
                 SkDebugf("%s\n", bench->getName());
             } else if (FLAGS_quiet) {
                 if (targets.count() == 1) {
                     config = ""; // Only print the config if we run the same bench on more than one.
                 }
                 SkDebugf("%s\t%s\t%s\n", humanize(stats.median).c_str(), bench->getName(), config);
             } else {
                 const double stddev_percent = 100 * sqrt(stats.var) / stats.mean;
-                SkDebugf("%d\t%s\t%s\t%s\t%s\t%.0f%%\t%s\t%s\n"
+                SkDebugf("%d\t%s\t%s\t%s\t%s\t%.0f%%\t%s\t%s\t%s\n"
                         , loops
                         , humanize(stats.min).c_str()
                         , humanize(stats.median).c_str()
                         , humanize(stats.mean).c_str()
                         , humanize(stats.max).c_str()
                         , stddev_percent
+                        , stats.plot.c_str()
                         , config
                         , bench->getName()
                         );
             }
         }
         targets.deleteAll();
     }
 
     return 0;
 }
 
 #if !defined SK_BUILD_FOR_IOS
 int main(int argc, char * const argv[]) {
     return tool_main(argc, (char**) argv);
 }
 #endif