141af7191b0f8be947e616cab9816e68231230ca.svn-base 19.7 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670
// JSLitmus.js
//
// History:
//   2008-10-27: Initial release
//   2008-11-09: Account for iteration loop overhead
//   2008-11-13: Added OS detection
//   2009-02-25: Create tinyURL automatically, shift-click runs tests in reverse
//
// Copyright (c) 2008-2009, Robert Kieffer
// All Rights Reserved
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the
// Software), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// THE SOFTWARE IS PROVIDED AS IS, WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

(function() {
  // Private methods and state

  // Get platform info but don't go crazy trying to recognize everything
  // that's out there.  This is just for the major platforms and OSes.
  var platform = 'unknown platform', ua = navigator.userAgent;

  // Detect OS
  var oses = ['Windows','iPhone OS','(Intel |PPC )?Mac OS X','Linux'].join('|');
  var pOS = new RegExp('((' + oses + ') [^ \);]*)').test(ua) ? RegExp.$1 : null;
  if (!pOS) pOS = new RegExp('((' + oses + ')[^ \);]*)').test(ua) ? RegExp.$1 : null;

  // Detect browser
  var pName = /(Chrome|MSIE|Safari|Opera|Firefox)/.test(ua) ? RegExp.$1 : null;

  // Detect version
  var vre = new RegExp('(Version|' + pName + ')[ \/]([^ ;]*)');
  var pVersion = (pName && vre.test(ua)) ? RegExp.$2 : null;
  var platform = (pOS && pName && pVersion) ? pName + ' '  + pVersion + ' on ' + pOS : 'unknown platform';

  /**
  * A smattering of methods that are needed to implement the JSLitmus testbed.
  */
  var jsl = {
    /**
    * Enhanced version of escape()
    */
    escape: function(s) {
      s = s.replace(/,/g, '\\,');
      s = escape(s);
      s = s.replace(/\+/g, '%2b');
      s = s.replace(/ /g, '+');
      return s;
    },

    /**
    * Get an element by ID.
    */
    $: function(id) {
      return document.getElementById(id);
    },

    /**
    * Null function
    */
    F: function() {},

    /**
    * Set the status shown in the UI
    */
    status: function(msg) {
      var el = jsl.$('jsl_status');
      if (el) el.innerHTML = msg || '';
    },

    /**
    * Convert a number to an abbreviated string like, "15K" or "10M"
    */
    toLabel: function(n) {
      if (n == Infinity) {
        return 'Infinity';
      } else if (n > 1e9) {
        n = Math.round(n/1e8);
        return n/10 + 'B';
      } else if (n > 1e6) {
        n = Math.round(n/1e5);
        return n/10 + 'M';
      } else if (n > 1e3) {
        n = Math.round(n/1e2);
        return n/10 + 'K';
      }
      return n;
    },

    /**
    * Copy properties from src to dst
    */
    extend: function(dst, src) {
      for (var k in src) dst[k] = src[k]; return dst;
    },

    /**
    * Like Array.join(), but for the key-value pairs in an object
    */
    join: function(o, delimit1, delimit2) {
      if (o.join) return o.join(delimit1);  // If it's an array
      var pairs = [];
      for (var k in o) pairs.push(k + delimit1 + o[k]);
      return pairs.join(delimit2);
    },

    /**
    * Array#indexOf isn't supported in IE, so we use this as a cross-browser solution
    */
    indexOf: function(arr, o) {
      if (arr.indexOf) return arr.indexOf(o);
      for (var i = 0; i < this.length; i++) if (arr[i] === o) return i;
      return -1;
    }
  };

  /**
  * Test manages a single test (created with
  * JSLitmus.test())
  * 
  * @private
  */
  var Test = function (name, f) {
    if (!f) throw new Error('Undefined test function');
    if (!(/function[^\(]*\(([^,\)]*)/).test(f.toString())) {
      throw new Error('"' + name + '" test: Test is not a valid Function object');
    }
    this.loopArg = RegExp.$1;
    this.name = name;
    this.f = f;
  };
  
  jsl.extend(Test, /** @lends Test */ {
    /** Calibration tests for establishing iteration loop overhead */
    CALIBRATIONS: [
      new Test('calibrating loop', function(count) {while (count--);}),
      new Test('calibrating function', jsl.F)
    ],

    /**
    * Run calibration tests.  Returns true if calibrations are not yet
    * complete (in which case calling code should run the tests yet again).
    * onCalibrated - Callback to invoke when calibrations have finished
    */
    calibrate: function(onCalibrated) {
      for (var i = 0; i < Test.CALIBRATIONS.length; i++) { 
        var cal = Test.CALIBRATIONS[i];
        if (cal.running) return true;
        if (!cal.count) {
          cal.isCalibration = true;
          cal.onStop = onCalibrated;
          //cal.MIN_TIME = .1; // Do calibrations quickly
          cal.run(2e4);
          return true;
        }
      }
      return false;
    }
  });

  jsl.extend(Test.prototype, {/** @lends Test.prototype */
    /** Initial number of iterations */
    INIT_COUNT: 10,
    /** Max iterations allowed (i.e. used to detect bad looping functions) */
    MAX_COUNT: 1e9,
    /** Minimum time a test should take to get valid results (secs) */
    MIN_TIME: .5,

    /** Callback invoked when test state changes */
    onChange: jsl.F,

    /** Callback invoked when test is finished */
    onStop: jsl.F,

    /**
     * Reset test state
     */
    reset: function() {
      delete this.count;
      delete this.time;
      delete this.running;
      delete this.error;
    },

    /**
    * Run the test (in a timeout). We use a timeout to make sure the browser
    * has a chance to finish rendering any UI changes we've made, like
    * updating the status message.
    */
    run: function(count) {
      count = count || this.INIT_COUNT;
      jsl.status(this.name + ' x ' + count);
      this.running = true;
      var me = this;
      setTimeout(function() {me._run(count);}, 200);
    },

    /**
     * The nuts and bolts code that actually runs a test
     */
    _run: function(count) {
      var me = this;

      // Make sure calibration tests have run
      if (!me.isCalibration && Test.calibrate(function() {me.run(count);})) return;
      this.error = null;

      try {
        var start, f = this.f, now, i = count;

        // Start the timer
        start = new Date();

        // Now for the money shot.  If this is a looping function ...
        if (this.loopArg) {
          // ... let it do the iteration itself
          f(count);
        } else {
          // ... otherwise do the iteration for it
          while (i--) f();
        }

        // Get time test took (in secs)
        this.time = Math.max(1,new Date() - start)/1000;

        // Store iteration count and per-operation time taken
        this.count = count;
        this.period = this.time/count;

        // Do we need to do another run?
        this.running = this.time <= this.MIN_TIME;

        // ... if so, compute how many times we should iterate
        if (this.running) {
          // Bump the count to the nearest power of 2
          var x = this.MIN_TIME/this.time;
          var pow = Math.pow(2, Math.max(1, Math.ceil(Math.log(x)/Math.log(2))));
          count *= pow;
          if (count > this.MAX_COUNT) {
            throw new Error('Max count exceeded.  If this test uses a looping function, make sure the iteration loop is working properly.');
          }
        }
      } catch (e) {
        // Exceptions are caught and displayed in the test UI
        this.reset();
        this.error = e;
      }

      // Figure out what to do next
      if (this.running) {
        me.run(count);
      } else {
        jsl.status('');
        me.onStop(me);
      }

      // Finish up
      this.onChange(this);
    },

    /**
    * Get the number of operations per second for this test.
    * 
    * @param normalize if true, iteration loop overhead taken into account
    */
    getHz: function(/**Boolean*/ normalize) {
      var p = this.period;

      // Adjust period based on the calibration test time
      if (normalize && !this.isCalibration) {
        var cal = Test.CALIBRATIONS[this.loopArg ? 0 : 1];

        // If the period is within 20% of the calibration time, then zero the
        // it out
        p = p < cal.period*1.2 ? 0 : p - cal.period;
      }

      return Math.round(1/p);
    },

    /**
    * Get a friendly string describing the test
    */
    toString: function() {
      return this.name + ' - '  + this.time/this.count + ' secs';
    }
  });

  // CSS we need for the UI
  var STYLESHEET = '<style> \
    #jslitmus {font-family:sans-serif; font-size: 12px;} \
    #jslitmus a {text-decoration: none;} \
    #jslitmus a:hover {text-decoration: underline;} \
    #jsl_status { \
      margin-top: 10px; \
      font-size: 10px; \
      color: #888; \
    } \
    A IMG  {border:none} \
    #test_results { \
      margin-top: 10px; \
      font-size: 12px; \
      font-family: sans-serif; \
      border-collapse: collapse; \
      border-spacing: 0px; \
    } \
    #test_results th, #test_results td { \
      border: solid 1px #ccc; \
      vertical-align: top; \
      padding: 3px; \
    } \
    #test_results th { \
      vertical-align: bottom; \
      background-color: #ccc; \
      padding: 1px; \
      font-size: 10px; \
    } \
    #test_results #test_platform { \
      color: #444; \
      text-align:center; \
    } \
    #test_results .test_row { \
      color: #006; \
      cursor: pointer; \
    } \
    #test_results .test_nonlooping { \
      border-left-style: dotted; \
      border-left-width: 2px; \
    } \
    #test_results .test_looping { \
      border-left-style: solid; \
      border-left-width: 2px; \
    } \
    #test_results .test_name {white-space: nowrap;} \
    #test_results .test_pending { \
    } \
    #test_results .test_running { \
      font-style: italic; \
    } \
    #test_results .test_done {} \
    #test_results .test_done { \
      text-align: right; \
      font-family: monospace; \
    } \
    #test_results .test_error {color: #600;} \
    #test_results .test_error .error_head {font-weight:bold;} \
    #test_results .test_error .error_body {font-size:85%;} \
    #test_results .test_row:hover td { \
      background-color: #ffc; \
      text-decoration: underline; \
    } \
    #chart { \
      margin: 10px 0px; \
      width: 250px; \
    } \
    #chart img { \
      border: solid 1px #ccc; \
      margin-bottom: 5px; \
    } \
    #chart #tiny_url { \
      height: 40px; \
      width: 250px; \
    } \
    #jslitmus_credit { \
      font-size: 10px; \
      color: #888; \
      margin-top: 8px; \
    } \
    </style>';

  // HTML markup for the UI
  var MARKUP = '<div id="jslitmus"> \
      <button onclick="JSLitmus.runAll(event)">Run Tests</button> \
      <button id="stop_button" disabled="disabled" onclick="JSLitmus.stop()">Stop Tests</button> \
      <br \> \
      <br \> \
      <input type="checkbox" style="vertical-align: middle" id="test_normalize" checked="checked" onchange="JSLitmus.renderAll()""> Normalize results \
      <table id="test_results"> \
        <colgroup> \
          <col /> \
          <col width="100" /> \
        </colgroup> \
        <tr><th id="test_platform" colspan="2">' + platform + '</th></tr> \
        <tr><th>Test</th><th>Ops/sec</th></tr> \
        <tr id="test_row_template" class="test_row" style="display:none"> \
          <td class="test_name"></td> \
          <td class="test_result">Ready</td> \
        </tr> \
      </table> \
      <div id="jsl_status"></div> \
      <div id="chart" style="display:none"> \
      <a id="chart_link" target="_blank"><img id="chart_image"></a> \
      TinyURL (for chart): \
      <iframe id="tiny_url" frameBorder="0" scrolling="no" src=""></iframe> \
      </div> \
      <a id="jslitmus_credit" title="JSLitmus home page" href="http://code.google.com/p/jslitmus" target="_blank">Powered by JSLitmus</a> \
    </div>';

  /**
   * The public API for creating and running tests
   */
  window.JSLitmus = {
    /** The list of all tests that have been registered with JSLitmus.test */
    _tests: [],
    /** The queue of tests that need to be run */
    _queue: [],

    /**
    * The parsed query parameters the current page URL.  This is provided as a
    * convenience for test functions - it's not used by JSLitmus proper
    */
    params: {},

    /**
     * Initialize
     */
    _init: function() {
      // Parse query params into JSLitmus.params[] hash
      var match = (location + '').match(/([^?#]*)(#.*)?$/);
      if (match) {
        var pairs = match[1].split('&');
        for (var i = 0; i < pairs.length; i++) {
          var pair = pairs[i].split('=');
          if (pair.length > 1) {
            var key = pair.shift();
            var value = pair.length > 1 ? pair.join('=') : pair[0];
            this.params[key] = value;
          }
        }
      }

      // Write out the stylesheet.  We have to do this here because IE
      // doesn't honor sheets written after the document has loaded.
      document.write(STYLESHEET);

      // Setup the rest of the UI once the document is loaded
      if (window.addEventListener) {
        window.addEventListener('load', this._setup, false);
      } else if (document.addEventListener) {
        document.addEventListener('load', this._setup, false);
      } else if (window.attachEvent) {
        window.attachEvent('onload', this._setup);
      }

      return this;
    },

    /**
     * Set up the UI
     */
    _setup: function() {
      var el = jsl.$('jslitmus_container');
      if (!el) document.body.appendChild(el = document.createElement('div'));

      el.innerHTML = MARKUP;

      // Render the UI for all our tests
      for (var i=0; i < JSLitmus._tests.length; i++)
        JSLitmus.renderTest(JSLitmus._tests[i]);
    },

    /**
     * (Re)render all the test results
     */
    renderAll: function() {
      for (var i = 0; i < JSLitmus._tests.length; i++)
        JSLitmus.renderTest(JSLitmus._tests[i]);
      JSLitmus.renderChart();
    },

    /**
     * (Re)render the chart graphics
     */
    renderChart: function() {
      var url = JSLitmus.chartUrl();
      jsl.$('chart_link').href = url;
      jsl.$('chart_image').src = url;
      jsl.$('chart').style.display = '';

      // Update the tiny URL
      jsl.$('tiny_url').src = 'http://tinyurl.com/api-create.php?url='+escape(url);
    },

    /**
     * (Re)render the results for a specific test
     */
    renderTest: function(test) {
      // Make a new row if needed
      if (!test._row) {
        var trow = jsl.$('test_row_template');
        if (!trow) return;

        test._row = trow.cloneNode(true);
        test._row.style.display = '';
        test._row.id = '';
        test._row.onclick = function() {JSLitmus._queueTest(test);};
        test._row.title = 'Run ' + test.name + ' test';
        trow.parentNode.appendChild(test._row);
        test._row.cells[0].innerHTML = test.name;
      }

      var cell = test._row.cells[1];
      var cns = [test.loopArg ? 'test_looping' : 'test_nonlooping'];

      if (test.error) {
        cns.push('test_error');
        cell.innerHTML = 
        '<div class="error_head">' + test.error + '</div>' +
        '<ul class="error_body"><li>' +
          jsl.join(test.error, ': ', '</li><li>') +
          '</li></ul>';
      } else {
        if (test.running) {
          cns.push('test_running');
          cell.innerHTML = 'running';
        } else if (jsl.indexOf(JSLitmus._queue, test) >= 0) {
          cns.push('test_pending');
          cell.innerHTML = 'pending';
        } else if (test.count) {
          cns.push('test_done');
          var hz = test.getHz(jsl.$('test_normalize').checked);
          cell.innerHTML = hz != Infinity ? hz : '&infin;';
        } else {
          cell.innerHTML = 'ready';
        }
      }
      cell.className = cns.join(' ');
    },

    /**
     * Create a new test
     */
    test: function(name, f) {
      // Create the Test object
      var test = new Test(name, f);
      JSLitmus._tests.push(test);

      // Re-render if the test state changes
      test.onChange = JSLitmus.renderTest;

      // Run the next test if this one finished
      test.onStop = function(test) {
        if (JSLitmus.onTestFinish) JSLitmus.onTestFinish(test);
        JSLitmus.currentTest = null;
        JSLitmus._nextTest();
      };

      // Render the new test
      this.renderTest(test);
    },

    /**
     * Add all tests to the run queue
     */
    runAll: function(e) {
      e = e || window.event;
      var reverse = e && e.shiftKey, len = JSLitmus._tests.length;
      for (var i = 0; i < len; i++) {
        JSLitmus._queueTest(JSLitmus._tests[!reverse ? i : (len - i - 1)]);
      }
    },

    /**
     * Remove all tests from the run queue.  The current test has to finish on
     * it's own though
     */
    stop: function() {
      while (JSLitmus._queue.length) {
        var test = JSLitmus._queue.shift();
        JSLitmus.renderTest(test);
      }
    },

    /**
     * Run the next test in the run queue
     */
    _nextTest: function() {
      if (!JSLitmus.currentTest) {
        var test = JSLitmus._queue.shift();
        if (test) {
          jsl.$('stop_button').disabled = false;
          JSLitmus.currentTest = test;
          test.run();
          JSLitmus.renderTest(test);
          if (JSLitmus.onTestStart) JSLitmus.onTestStart(test);
        } else {
          jsl.$('stop_button').disabled = true;
          JSLitmus.renderChart();
        }
      }
    },

    /**
     * Add a test to the run queue
     */
    _queueTest: function(test) {
      if (jsl.indexOf(JSLitmus._queue, test) >= 0) return;
      JSLitmus._queue.push(test);
      JSLitmus.renderTest(test);
      JSLitmus._nextTest();
    },

    /**
     * Generate a Google Chart URL that shows the data for all tests
     */
    chartUrl: function() {
      var n = JSLitmus._tests.length, markers = [], data = [];
      var d, min = 0, max = -1e10;
      var normalize = jsl.$('test_normalize').checked;

      // Gather test data
      for (var i=0; i < JSLitmus._tests.length; i++) {
        var test = JSLitmus._tests[i];
        if (test.count) {
          var hz = test.getHz(normalize);
          var v = hz != Infinity ? hz : 0;
          data.push(v);
          markers.push('t' + jsl.escape(test.name + '(' + jsl.toLabel(hz)+ ')') + ',000000,0,' +
            markers.length + ',10');
          max = Math.max(v, max);
        }
      }
      if (markers.length <= 0) return null;

      // Build chart title
      var title = document.getElementsByTagName('title');
      title = (title && title.length) ? title[0].innerHTML : null;
      var chart_title = [];
      if (title) chart_title.push(title);
      chart_title.push('Ops/sec (' + platform + ')');

      // Build labels
      var labels = [jsl.toLabel(min), jsl.toLabel(max)];

      var w = 250, bw = 15;
      var bs = 5;
      var h = markers.length*(bw + bs) + 30 + chart_title.length*20;

      var params = {
        chtt: escape(chart_title.join('|')),
        chts: '000000,10',
        cht: 'bhg',                     // chart type
        chd: 't:' + data.join(','),     // data set
        chds: min + ',' + max,          // max/min of data
        chxt: 'x',                      // label axes
        chxl: '0:|' + labels.join('|'), // labels
        chsp: '0,1',
        chm: markers.join('|'),         // test names
        chbh: [bw, 0, bs].join(','),    // bar widths
        // chf: 'bg,lg,0,eeeeee,0,eeeeee,.5,ffffff,1', // gradient
        chs: w + 'x' + h
      };
      return 'http://chart.apis.google.com/chart?' + jsl.join(params, '=', '&');
    } 
  };

  JSLitmus._init();
})();