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     27 
     28 <html lang="en-us">
     29 <head>
     30   <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
     31   <title>V8 profile log plotter</title>
     32   <link rel="stylesheet" type="text/css" href="profviz.css">
     33   <script src="profviz.js"></script>
     34 </head>
     35 
     36 <body onload="onload()">
     37   <div id="content">
     38   
     39   <img src="" id="plot" type="image/svg+xml" class="display"
     40       width="1200" height="600" class="float-right"/>
     41 
     42   <textarea id="prof" class="display" disabled=true></textarea>
     43   <br/>
     44 
     45   <table width="1200">
     46     <tr>
     47       <td width="330">
     48         <button id="start" onclick="start()">
     49           Start
     50         </button>
     51         <button id="reset" onclick="ui.reset(); worker.reset();">
     52           Reset
     53         </button>
     54         <button id="toggledisplay" onclick="ui.toggle();">
     55           Show profile
     56         </button>
     57       </td>
     58       <td width="220">
     59         <input type="file" id="file" onchange="ui.reset();"/>
     60       </td>
     61       <td width="300">
     62       <label title="You can manually choose the range
     63 to plot only part of the log file.">
     64         <span class="tooltip">Range</span>:
     65       </label>
     66       <input type="text" id="range_start" class="range"/>
     67       <label>to</label>
     68       <input type="text" id="range_end" class="range"/>
     69       </td>
     70       <td width="350">
     71         <label title="We model profiling overhead by accounting a constant
     72 execution delay to each log entry. Adjust to better suit
     73 your computer's performance.">
     74           <span class="tooltip">Delay per log entry</span>:
     75         </label>
     76         <input type="text" id="distortion" class="range" value="4500"/>
     77         <label>picoseconds</label>
     78       </td>
     79     </tr>
     80   </table>
     81 
     82   <br/>
     83   <textarea class="log" id="log" rows="8" disabled=true></textarea>
     84 
     85   <div class="text">
     86     <h1>
     87       <a href="javascript:ui.info('instructions');" class="unroll">
     88         Instructions
     89       </a>
     90     </h1>
     91     <div id="instructions">
     92     <ol>
     93       <li>
     94         Run V8 with
     95         <span class="tt">--prof --log-timer-events</span>,
     96         or alternatively,<br/>
     97         Chrome with
     98         <span class="tt">
     99           --no-sandbox --js-flags="--prof --log-timer-events"
    100         </span> to produce <span class="tt">v8.log</span>.
    101       </li>
    102       <li>
    103         Open
    104         <span class="tt">v8.log</span>
    105         on this page. Don't worry, it won't be uploaded anywhere.
    106       </li>
    107       <li>
    108         Click "Start" to start number crunching. This will take a while.
    109       </li>
    110       <li>
    111         Click "Show plot/profile" to switch between the statistical profile and
    112         the timeline plot.<br/>
    113         C++ items are missing in the statistical profile because symbol
    114         information is not available.<br>
    115         Consider using the
    116         <a href="https://code.google.com/p/v8/wiki/V8Profiler">
    117           command-line utility
    118         </a> instead.
    119       </li>
    120     </ol>
    121     If you expect multiple V8 instances to run concurrently, for example
    122     with several tabs in Chrome,<br/>
    123     add the V8 flag <span class="tt">--logfile=v8.%p.log</span>
    124     so that each instance writes to its own log file.
    125     </div>
    126   </div>
    127 
    128   <div class="text">
    129     <h1>
    130       <a href="javascript:ui.info('credits');" class="unroll">
    131         Credits
    132       </a>
    133     </h1>
    134     <div id="credits">
    135     <ul>
    136       <li>
    137         Christian Huettig for the
    138         <a href="http://gnuplot.respawned.com/">Javascript port</a>
    139         of Gnuplot 4.6.3.
    140       </li>
    141       <li>
    142         The
    143         <a href="https://github.com/kripken/emscripten">Emscripten compiler</a>
    144         that made the port possible.
    145       </li>
    146       <li>
    147         The <a href="http://www.gnuplot.info/">Gnuplot project</a>.
    148       </li>
    149       <li>
    150         The <a href="https://developers.google.com/v8/">V8 project</a>.
    151       </li>
    152     </ul>
    153     </div>
    154   </div>
    155 
    156 </div>
    157 </body>
    158 </html>
    159