pegjs/benchmark/index.js

/* eslint-env browser, jquery */

let benchmarks = require("./benchmarks.js"),
    Runner     = require("./runner.js");

$("#run").click(() => {
  "use strict";

  /* Results Table Manipulation */

  let resultsTable = $("#results-table");

  function appendHeading(heading) {
    resultsTable.append(
      "<tr class='heading'><th colspan='4'>" + heading + "</th></tr>"
    );
  }

  function appendResult(klass, title, url, inputSize, parseTime) {
    const KB      = 1024,
          MS_IN_S = 1000;

    resultsTable.append(
        "<tr class='" + klass + "'>"
      +   "<td class='title'>"
      +     (url !== null ? "<a href='" + url + "'>" : "")
      +       title
      +     (url !== null ? "</a>" : "")
      +   "</td>"
      +   "<td class='input-size'>"
      +     "<span class='value'>"
      +       (inputSize / KB).toFixed(2)
      +     "</span>"
      +     "&nbsp;<span class='unit'>kB</span>"
      +   "</td>"
      +   "<td class='parse-time'>"
      +     "<span class='value'>"
      +       parseTime.toFixed(2)
      +     "</span>"
      +     "&nbsp;<span class='unit'>ms</span>"
      +   "</td>"
      +   "<td class='parse-speed'>"
      +     "<span class='value'>"
      +       ((inputSize / KB) / (parseTime / MS_IN_S)).toFixed(2)
      +     "</span>"
      +     "&nbsp;<span class='unit'>kB/s</span>"
      +   "</td>"
      + "</tr>"
    );
  }

  /* Main */

  /*
   * Each input is parsed multiple times and the results are averaged. We
   * do this for two reasons:
   *
   *   1. To warm up the interpreter (PEG.js-generated parsers will be
   *      most likely used repeatedly, so it makes sense to measure
   *      performance after warming up).
   *
   *   2. To minimize random errors.
   */

  let runCount = parseInt($("#run-count").val(), 10),
      options  = {
        cache:    $("#cache").is(":checked"),
        optimize: $("#optimize").val()
      };

  if (isNaN(runCount) || runCount <= 0) {
    alert("Number of runs must be a positive integer.");
    return;
  }

  Runner.run(benchmarks, runCount, options, {
    readFile: function(file) {
      return $.ajax({
        type:     "GET",
        url:      file,
        dataType: "text",
        async:    false
      }).responseText;
    },

    testStart: function() {
      /* Nothing to do. */
    },

    testFinish: function(benchmark, test, inputSize, parseTime) {
      appendResult(
        "individual",
        test.title,
        benchmark.id + "/" + test.file,
        inputSize,
        parseTime
      );
    },

    benchmarkStart: function(benchmark) {
      appendHeading(benchmark.title);
    },

    benchmarkFinish: function(benchmark, inputSize, parseTime) {
      appendResult(
        "benchmark-total",
        benchmark.title + " total",
        null,
        inputSize,
        parseTime
      );
    },

    start: function() {
      $("#run-count, #cache, #run").attr("disabled", "disabled");

      resultsTable.show();
      $("#results-table tr").slice(1).remove();
    },

    finish: function(inputSize, parseTime) {
      appendResult(
        "total",
        "Total",
        null,
        inputSize,
        parseTime
      );

      $.scrollTo("max", { axis: "y", duration: 500 });

      $("#run-count, #cache, #run").removeAttr("disabled");
    }
  });

});

$(document).ready(() => {
  "use strict";

  $("#run").focus();
});