xref: /sqlite-3.40.0/ext/wasm/speedtest1-worker.html (revision dd628ed5)

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    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <link rel="shortcut icon" href="data:image/x-icon;," type="image/x-icon">
    <link rel="stylesheet" href="common/emscripten.css"/>
    <link rel="stylesheet" href="common/testing.css"/>
    <title>speedtest1.wasm Worker</title>
  </head>
  <body>
    <header id='titlebar'>speedtest1.wasm Worker</header>
    <div>See also: <a href='speedtest1.html'>A main-thread variant of this page.</a></div>
    <!-- emscripten bits -->
    <figure id="module-spinner">
      <div class="spinner"></div>
      <div class='center'><strong>Initializing app...</strong></div>
      <div class='center'>
        On a slow internet connection this may take a moment.  If this
        message displays for "a long time", intialization may have
        failed and the JavaScript console may contain clues as to why.
      </div>
    </figure>
    <div class="emscripten" id="module-status">Downloading...</div>
    <div class="emscripten">
      <progress value="0" max="100" id="module-progress" hidden='1'></progress>
    </div><!-- /emscripten bits -->
    <fieldset id='ui-controls' class='hidden'>
      <legend>Options</legend>
      <div id='toolbar'>
        <div id='toolbar-select'>
          <select id='select-flags' size='10' multiple></select>
          <div>TODO? Options which require values are not represented here.</div>
        </div>
        <div class='toolbar-inner-vertical' id='toolbar-selected-flags'>
          <button id='btn-reset-flags'>Reset Flags</button>
          <button id='btn-output-clear'>Clear output</button>
          <button id='btn-run'>Run</button>
        </div>
        <div class='toolbar-inner-vertical' id='toolbar-runner-controls'>
          <button id='btn-reset-flags'>Reset Flags</button>
          <button id='btn-output-clear'>Clear output</button>
          <button id='btn-run'>Run</button>
        </div>
      </div>
    </fieldset>
    <div>
      <span class='input-wrapper'>
        <input type='checkbox' class='disable-during-eval' id='cb-reverse-log-order' checked></input>
        <label for='cb-reverse-log-order' id='lbl-reverse-log-order'>Reverse log order</label>
      </span>
    </div>
    <div id='test-output'>
    </div>
    <div id='tips'>
      <strong>Tips:</strong>
      <ul>
        <li>Control-click the flags to (de)select multiple flags.</li>
        <li>The easiest way to try different optimization levels is,
          from this directory:
          <pre>$ rm -f speedtest1.js; make -e emcc_opt='-O2' speedtest1.js</pre>
          Then reload this page. -O2 seems to consistently produce the fastest results.
        </li>
        <li>TODO: add a link in this app which launches the main-thread
          version with the same flags.</li>
        </ul>
    </div>
    <style>
      #test-output {
          white-space: break-spaces;
          overflow: auto;
      }
      div#tips { margin-top: 1em; }
      #toolbar {
          display: flex;
          flex-direction: row;
          flex-wrap: wrap;
      }
      #toolbar > * {
          margin: 0 0.5em;
      }
      .toolbar-inner-vertical {
          display: flex;
          flex-direction: column;
          justify-content: space-between;
      }
      #toolbar-select {
          display: flex;
          flex-direction: column;
      }
      .toolbar-inner-vertical > *, #toolbar-select > * {
          margin: 0.2em 0;
      }
      #select-flags > option {
          white-space: pre;
          font-family: monospace;
      }
      fieldset {
          border-radius: 0.5em;
      }
      #toolbar-runner-controls { flex-grow: 1 }
      #toolbar-runner-controls > * { flex: 1 0 auto }
      #toolbar-selected-flags::before {
        font-family: initial;
        content:"Selected flags: ";
      }
      #toolbar-selected-flags {
        font-family: monospace;
        justify-content: flex-start;
      }
    </style>
    <script>(function(){
      'use strict';
      const E = (sel)=>document.querySelector(sel);
      const eOut = E('#test-output');
      const log2 = function(cssClass,...args){
        let ln;
        if(1 || cssClass){
          ln = document.createElement('div');
          if(cssClass) ln.classList.add(cssClass);
          ln.append(document.createTextNode(args.join(' ')));
        }else{
          // This doesn't work with the "reverse order" option!
          ln = document.createTextNode(args.join(' ')+'\n');
        }
        eOut.append(ln);
      };
      const log = (...args)=>{
        //console.log(...args);
        log2('', ...args);
      };
      const logErr = function(...args){
        //console.error(...args);
        log2('error', ...args);
      };
      const logWarn = function(...args){
        //console.warn(...args);
        log2('warning', ...args);
      };

      const spacePad = function(str,len=18){
        if(str.length===len) return str;
        else if(str.length>len) return str.substr(0,len);
        const a = []; a.length = len - str.length;
        return str+a.join(' ');
      };
      // OPTION elements seem to ignore white-space:pre, so do this the hard way...
      const nbspPad = function(str,len=18){
        if(str.length===len) return str;
        else if(str.length>len) return str.substr(0,len);
        const a = []; a.length = len - str.length;
        return str+a.join('&nbsp;');
      };

      const W = new Worker("speedtest1-worker.js");
      const mPost = function(msgType,payload){
        W.postMessage({type: msgType, data: payload});
      };

      const eFlags = E('#select-flags');
      const eSelectedFlags = E('#toolbar-selected-flags');

      const getSelectedFlags = ()=>Array.prototype.map.call(eFlags.selectedOptions, (v)=>v.value);
      const updateSelectedFlags = function(){
        eSelectedFlags.innerText = '';
        getSelectedFlags().forEach(function(f){
          const e = document.createElement('span');
          e.innerText = f;
          eSelectedFlags.appendChild(e);
        });
      };
      eFlags.addEventListener('change', updateSelectedFlags );
      {
        const flags = Object.create(null);
        /* TODO? Flags which require values need custom UI
           controls and some of them make little sense here
           (e.g. --script FILE). */
        flags["autovacuum"] = "Enable AUTOVACUUM mode";
        flags["big-transactions"] = "Important for tests 410 and 510!";
        //flags["cachesize"] = "N       Set the cache size to N";
        flags["checkpoint"] = "Run PRAGMA wal_checkpoint after each test case";
        flags["exclusive"] = "Enable locking_mode=EXCLUSIVE";
        flags["explain"] = "Like --sqlonly but with added EXPLAIN keywords";
        //flags["heap"] = "SZ MIN       Memory allocator uses SZ bytes & min allocation MIN";
        flags["incrvacuum"] = "Enable incremenatal vacuum mode";
        //flags["journal"] = "M         Set the journal_mode to M";
        //flags["key"] = "KEY           Set the encryption key to KEY";
        //flags["lookaside"] = "N SZ    Configure lookaside for N slots of SZ bytes each";
        flags["memdb"] = "Use an in-memory database";
        //flags["mmap"] = "SZ           MMAP the first SZ bytes of the database file";
        flags["multithread"] = "Set multithreaded mode";
        flags["nomemstat"] = "Disable memory statistics";
        flags["nomutex"] = "Open db with SQLITE_OPEN_NOMUTEX";
        flags["nosync"] = "Set PRAGMA synchronous=OFF";
        flags["notnull"] = "Add NOT NULL constraints to table columns";
        //flags["output"] = "FILE       Store SQL output in FILE";
        //flags["pagesize"] = "N        Set the page size to N";
        //flags["pcache"] = "N SZ       Configure N pages of pagecache each of size SZ bytes";
        //flags["primarykey"] = "Use PRIMARY KEY instead of UNIQUE where appropriate";
        //flags["repeat"] = "N          Repeat each SELECT N times (default: 1)";
        flags["reprepare"] = "Reprepare each statement upon every invocation";
        //flags["reserve"] = "N         Reserve N bytes on each database page";
        //flags["script"] = "FILE       Write an SQL script for the test into FILE";
        flags["serialized"] = "Set serialized threading mode";
        flags["singlethread"] = "Set single-threaded mode - disables all mutexing";
        flags["sqlonly"] = "No-op.  Only show the SQL that would have been run.";
        flags["shrink"] = "memory     Invoke sqlite3_db_release_memory() frequently.";
        //flags["size"] = "N            Relative test size.  Default=100";
        flags["strict"] = "Use STRICT table where appropriate";
        flags["stats"] = "Show statistics at the end";
        //flags["temp"] = "N            N from 0 to 9.  0: no temp table. 9: all temp tables";
        //flags["testset"] = "T         Run test-set T (main, cte, rtree, orm, fp, debug)";
        flags["trace"] = "Turn on SQL tracing";
        //flags["threads"] = "N         Use up to N threads for sorting";
        /*
          The core API's WASM build does not support UTF16, but in
          this app it's not an issue because the data are not crossing
          JS/WASM boundaries.
        */
        flags["utf16be"] = "Set text encoding to UTF-16BE";
        flags["utf16le"] = "Set text encoding to UTF-16LE";
        flags["verify"] = "Run additional verification steps.";
        flags["without"] = "rowid     Use WITHOUT ROWID where appropriate";
        const preselectedFlags = [
          'big-transactions',
          'memdb',
          'singlethread'
        ];
        Object.keys(flags).sort().forEach(function(f){
          const opt = document.createElement('option');
          eFlags.appendChild(opt);
          const lbl = nbspPad('--'+f)+flags[f];
          //opt.innerText = lbl;
          opt.innerHTML = lbl;
          opt.value = '--'+f;
          if(preselectedFlags.indexOf(f) >= 0) opt.selected = true;
        });

        const cbReverseLog = E('#cb-reverse-log-order');
        const lblReverseLog = E('#lbl-reverse-log-order');
        if(cbReverseLog.checked){
          lblReverseLog.classList.add('warning');
          eOut.classList.add('reverse');
        }
        cbReverseLog.addEventListener('change', function(){
          if(this.checked){
            eOut.classList.add('reverse');
            lblReverseLog.classList.add('warning');
          }else{
            eOut.classList.remove('reverse');
            lblReverseLog.classList.remove('warning');
          }
        }, false);
        updateSelectedFlags();
      }
      E('#btn-output-clear').addEventListener('click', ()=>{
        eOut.innerText = '';
      });
      E('#btn-reset-flags').addEventListener('click',()=>{
        eFlags.value = '';
        updateSelectedFlags();
      });
      E('#btn-run').addEventListener('click',function(){
        log("Running speedtest1. UI controls will be disabled until it completes.");
        mPost('run', getSelectedFlags());
      });

      const eControls = E('#ui-controls');
      /** Update Emscripten-related UI elements while loading the module. */
      const updateLoadStatus = function f(text){
        if(!f.last){
          f.last = { text: '', step: 0 };
          const E = (cssSelector)=>document.querySelector(cssSelector);
          f.ui = {
            status: E('#module-status'),
            progress: E('#module-progress'),
            spinner: E('#module-spinner')
          };
        }
        if(text === f.last.text) return;
        f.last.text = text;
        if(f.ui.progress){
          f.ui.progress.value = f.last.step;
          f.ui.progress.max = f.last.step + 1;
        }
        ++f.last.step;
        if(text) {
          f.ui.status.classList.remove('hidden');
          f.ui.status.innerText = text;
        }else{
          if(f.ui.progress){
            f.ui.progress.remove();
            f.ui.spinner.remove();
            delete f.ui.progress;
            delete f.ui.spinner;
          }
          f.ui.status.classList.add('hidden');
        }
      };

      W.onmessage = function(msg){
        msg = msg.data;
        switch(msg.type){
            case 'ready':
              log("Worker is ready.");
              eControls.classList.remove('hidden');
              break;
            case 'stdout': log(msg.data); break;
            case 'stdout': logErr(msg.data); break;
            case 'run-start':
              eControls.disabled = true;
              log("Running speedtest1 with argv =",msg.data.join(' '));
              break;
            case 'run-end':
              log("speedtest1 finished.");
              eControls.disabled = false;
              // app output is in msg.data
              break;
            case 'error': logErr(msg.data); break;
            case 'load-status': updateLoadStatus(msg.data); break;
            default:
              logErr("Unhandled worker message type:",msg);
              break;
        }
      };
    })();</script>
  </body>
</html>