Gruntfile.js

module.exports = function (grunt) {
  var q = require('q'),
      path = require('path'),
      exec = require('child_process').exec,
      createClone = require('./tasks/createClone')(grunt),
      checkoutSHA = require('./tasks/checkoutSha')(grunt),
      packageBuild = require('./tasks/packageBuild')(grunt),
      copyBuild = require('./tasks/copyBuild')(grunt),
      generateKarma = require('./tasks/generateKarma')(grunt);

  grunt.registerTask('compareShas', 'Run tests against two SHAs', function (sha1, sha2) {
    var GIT_DIR = 'angular.js';
    var BUILD_DIR = 'builds';
    var DEFAULT_REPO = 'https://github.com/angular/angular.js';
    var done = this.async();

    if (grunt.file.isDir(BUILD_DIR)) {
      grunt.file.delete(BUILD_DIR);
    }

    grunt.file.mkdir(BUILD_DIR);
    stepThrough(sha1);

    function stepThrough (sha) {
      createClone({repo: DEFAULT_REPO, sha: sha})
        .then(checkoutSHA)
        .then(packageBuild)
        .then(copyBuild)
        .then(function (options) {
          var deferred = q.defer();

          process.nextTick(function () {
            options.configFile = options.sha === sha1 ? 'configA.json' : 'configB.json';
            deferred.resolve(options);
          });

          return deferred.promise;
        })
        .then(generateKarma)
        .then(repeat);
    }

    function repeat (options) {
      if (options.sha === sha1 && sha2) {
        stepThrough(sha2);
       }
      else {
        done();
      }
    }
  });

  grunt.registerTask('benchmark', 'Run the benchmarks and generate a report',
    function() {
      var done = this.async();

      process.nextTick(function () {
        exec(' node node_modules/karma/bin/karma start --single-run |' +
             ' grep XXX: | sed -e "s/^.*XXX:[^{]*{\\(.*\\)}\'.*$/{\\1}/" > report/sampleTimes.json &&' +
             ' echo "var results =" > report/sampleTimes.js &&' +
             ' cat report/sampleTimes.json >> report/sampleTimes.js', function() {
          var sampleTimes = require('./report/sampleTimes.json');

          grunt.log.writeln('Results:');
          for (var s in sampleTimes) {
            grunt.log.writeln('  ' + s);
            var r = sampleTimes[s];
            var lines = [];
            var maxNameLen = 0;
            for (var b in r) {
              var bench = r[b];
              lines.push({name: bench.name, mean: Math.floor(1 / (bench.stats.mean + bench.stats.moe))});
              var nl = bench.name.length;
              if (nl > maxNameLen) maxNameLen = nl;
            }
            for (var l in lines) {
              var name = lines[l].name;
              grunt.log.writeln('    ' + name + ': ' + new Array(maxNameLen + 1 - name.length).join(' ') + lines[l].mean + ' ops/sec');
            }
            grunt.log.writeln('  Report: file://' + process.cwd() + '/report/report.html');
          }
          done();
        });
      });
    });
}