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var perf_data = {
start: null,
end: null,
};
function build_dom(n, elemName, options) {
// By default we use different elements in the DOM to defeat the style sharing
// cache, otherwise this sythetic DOM is trivially stylable by engines with that
// optimization.
options = options || {};
var elemNameLeft = options.elemNameLeft || "div";
var elemNameRight = options.elemNameRight || "span";
var ours = document.createElement(elemName);
for (var attr in options.attributes) {
ours.setAttribute(attr, options.attributes[attr]);
}
if (n != 1) {
var leftSize = Math.floor(n / 2);
var rightSize = Math.floor((n - 1) / 2);
ours.appendChild(build_dom(leftSize, elemNameLeft, options));
if (rightSize > 0) {
ours.appendChild(build_dom(rightSize, elemNameRight, options));
}
}
return ours;
}
function build_rule(selector, selectorRepeat, declaration, ruleRepeat) {
ruleRepeat = ruleRepeat || 1;
var s = document.createElement("style");
var rule = Array(selectorRepeat).fill(selector).join(", ") + declaration;
s.textContent = Array(ruleRepeat).fill(rule).join("\n\n");
return s;
}
function build_text(word, wordRepeat, paraRepeat) {
wordRepeat = wordRepeat || 1;
paraRepeat = paraRepeat || 1;
let para = Array(wordRepeat).fill(word).join(" ");
return Array(paraRepeat).fill(para).join("\n");
}
function flush_style(element) {
getComputedStyle(element || document.documentElement).color;
}
function flush_layout(element) {
(element || document.documentElement).offsetHeight;
}
function perf_start() {
if (perf_data.start !== null) {
throw new Error("already started timing!");
}
perf_data.start = performance.now();
}
function perf_finish() {
var end = performance.now();
if (perf_data.start === null) {
throw new Error("haven't started timing!");
}
if (perf_data.end !== null) {
throw new Error("already finished timing!");
}
var start = perf_data.start;
perf_data.end = end;
// when running in talos report results; when running outside talos just alert
if (window.tpRecordTime) {
// Running in talos.
window.tpRecordTime(end - start, start);
} else if (window.parent && window.parent.report_perf_reftest_time) {
// Running in the perf-reftest runner.
window.parent.report_perf_reftest_time({
type: "time",
value: end - start,
});
} else {
// Running standalone; just alert.
console.log(end);
console.log(start);
alert("Result: " + (end - start).toFixed(2) + " (ms)");
}
}
if (window.parent.report_perf_reftest_time) {
window.addEventListener("error", function (e) {
window.parent.report_perf_reftest_time({ type: "error", value: e.message });
});
}