resources/dom-perf/createnodes.js

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// CreateNodes
// Test mechanisms for creating and inserting nodes into a DOM tree.
//
// There are many ways to add nodes into a DOM tree.  This test exercises
// use of:
//    - createElement()/appendChild()
//    - createDocumentFragment()
//    - innerHTML()
//    - spans

function CreateNodes() {}

CreateNodes.nIterations = 10000;
CreateNodes.nIterationsSlow = 2000;
CreateNodes.currentIterations = CreateNodes.nIterations;
CreateNodes.nodeProto = null;

CreateNodes.createNode = function() {
    if (!CreateNodes.nodeProto) {
        var html = this.getNodeHTML();
        var span = document.createElement("span");
        span.innerHTML = html;
        CreateNodes.nodeProto = span.firstChild;
    }
    return CreateNodes.nodeProto;
};

CreateNodes.getNodeHTML = function() {
    return "<div style=\"font-style:bold\">test</div>";
};

CreateNodes.appendNodesWithDOM = function(node) {
    var nodes = CreateNodes.createNodesWithDOM(node);
    for (var i = 0; i < CreateNodes.nIterations; i++)
        this.suite.benchmarkContent.appendChild(nodes[i]);
    CreateNodes.forceNode(this);
};

CreateNodes.justAppendNodesWithDOM = function(nodes) {
    for (var i = 0; i < CreateNodes.nIterations; i++)
        this.suite.benchmarkContent.appendChild(nodes[i]);
};

CreateNodes.createNodesWithHTML = function(html) {
    var allHTML = "";
    for (var i = 0; i < CreateNodes.currentIterations; i++)
        allHTML += html;
    return allHTML;
};

CreateNodes.checkNodes = function() {
    var length = this.suite.benchmarkContent.childNodes.length;
    var count = CreateNodes.currentIterations;
    if (length != count)
        throw "Should have " + count + " nodes, have: " + length;
};

// Ensures that the node has really been created and not just delayed
CreateNodes.forceNode = function(benchmark) {
    var child =  benchmark.suite.benchmarkContent.childNodes[CreateNodes.nIterations / 2];
};

CreateNodes.appendNodesWithHTML = function(html) {
    var allHTML = CreateNodes.createNodesWithHTML(html);
    this.suite.benchmarkContent.innerHTML = allHTML;
    CreateNodes.forceNode(this);
};

CreateNodes.createNodesWithDOM = function(node) {
    var nodes = [];
    for (var i = 0; i < CreateNodes.nIterations; i++)
        nodes.push(node.cloneNode(true));
    return nodes;
};

CreateNodes.createNodesWithDOMSetup = function() {
    return createNodesWithDOM(createNode());
};

CreateNodes.createNodeSetup = function() {
    CreateNodes.currentIterations = CreateNodes.nIterations;
    return CreateNodes.createNode();
};

CreateNodes.createNodesWithHTMLUsingSpans = function(html) {
    var spans = [];
    for (var i = 0; i < CreateNodes.currentIterations; i++) {
        var spanNode = document.createElement("span");
        spanNode.innerHTML = html;
        spans.push(spanNode);
    }
    return spans;
};

CreateNodes.appendNodesWithHTMLUsingSpans = function(html) {
    var spans = CreateNodes.createNodesWithHTMLUsingSpans(html);
    for (var i = 0; i < CreateNodes.currentIterations; i++)
        this.suite.benchmarkContent.appendChild(spans[i]);
    CreateNodes.forceNode(this);
};

CreateNodes.appendNodesWithHTMLUsingDocumentFragments = function(html) {
    var fragments = CreateNodes.createNodesWithHTMLUsingDocumentFragments(html);
    for (var i = 0; i < CreateNodes.nIterations; i++)
        this.suite.benchmarkContent.appendChild(fragments[i]);
    CreateNodes.forceNode(this);
};

CreateNodes.createNodesWithHTMLUsingDocumentFragments = function(html) {
    var fragments = [];
    for (var i = 0; i < CreateNodes.nIterations; i++) {
        var fragment = document.createDocumentFragment();
        fragment.innerHTML = html;
        fragments.push(fragment);
    }
    return fragments;
};

CreateNodes.appendNodesWithDOMUsingDocumentFragment = function(node) {
    var fragment = CreateNodes.createNodesWithDOMUsingDocumentFragment(node);
    this.suite.benchmarkContent.appendChild(fragment);
    CreateNodes.forceNode(this);
};

CreateNodes.appendNodesWithDOMUsingSharedDocumentFragment = function(fragment) {
    this.suite.benchmarkContent.appendChild(fragment.cloneNode(true));
    CreateNodes.forceNode(this);
};

CreateNodes.createNodesWithDOMUsingDocumentFragment = function(node) {
    var nodes = CreateNodes.createNodesWithDOM(node);
    var fragment = document.createDocumentFragment();
    for (var i = 0; i < CreateNodes.nIterations; i++)
        fragment.appendChild(nodes[i]);
    return fragment;
};

CreateNodes.createSharedDocumentFragment = function() {
    var nodes = CreateNodes.createNodesWithDOM(CreateNodes.createNode());
    var fragment = document.createDocumentFragment();
    for (var i = 0; i < CreateNodes.nIterations; i++)
        fragment.appendChild(nodes[i]);
    return fragment;
};

CreateNodes.createHTMLSetup = function() {
    CreateNodes.currentIterations = CreateNodes.nIterationsSlow;
    return CreateNodes.getNodeHTML();
};

CreateNodes.createIFramesHTML = function() {
    var html = [];
    for (var i = 0; i < 100; i++)
        html.push("<iframe src='blank.html'></iframe>");
    return html.join('');
}

CreateNodes.appendIFramesHTML = function(html) {
    this.suite.benchmarkContent.innerHTML = html;
}

CreateNodes.createIFramesDOM = function() {
    var nodes = [];
    for (var i = 0; i < 100; i++) {
        var iframe = document.createElement('iframe');
        iframe.src = 'blank.html';
        nodes.push(iframe);
    }
    return nodes;
}

CreateNodes.appendIFramesDOM = function(nodes) {
    var content = this.suite.benchmarkContent;
    for (var i = 0, l = nodes.length; i < l; i++)
        content.appendChild(nodes[i]);
}

var CreateNodesTest = new BenchmarkSuite('CreateNodes', [
    new Benchmark("append, DOM, DocumentFragment",
        CreateNodes.appendNodesWithDOMUsingDocumentFragment, CreateNodes.createNodeSetup, CreateNodes.checkNodes),
    new Benchmark("create, DOM, DocumentFragment",
        CreateNodes.createNodesWithDOMUsingDocumentFragment, CreateNodes.createNodeSetup),
    new Benchmark("append, DOM, SharedDocumentFragment",
        CreateNodes.appendNodesWithDOMUsingSharedDocumentFragment, CreateNodes.createSharedDocumentFragment,  CreateNodes.checkNodes),
    new Benchmark("create, DOM",
        CreateNodes.createNodesWithDOM, CreateNodes.createNodeSetup),
    new Benchmark("append, DOM",
        CreateNodes.appendNodesWithDOM, CreateNodes.createNodeSetup, CreateNodes.checkNodes),
    new Benchmark("append, DOM, iFrame",
        CreateNodes.appendIFramesDOM, CreateNodes.createIFramesDOM),
    new Benchmark("append, HTML",
        CreateNodes.appendNodesWithHTML, CreateNodes.createHTMLSetup, CreateNodes.checkNodes),
    new Benchmark("create, HTML, Spans",
        CreateNodes.createNodesWithHTMLUsingSpans, CreateNodes.createHTMLSetup),
    new Benchmark("append, HTML, Spans",
        CreateNodes.appendNodesWithHTMLUsingSpans, CreateNodes.createHTMLSetup, CreateNodes.checkNodes),
    new Benchmark("append, HTML, iFrame",
        CreateNodes.appendIFramesHTML, CreateNodes.createIFramesHTML)
]);