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Commit 234c9091 authored by Christian Biesinger's avatar Christian Biesinger Committed by Commit Bot
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Add perf test for contain: contents 

Adds the testcase from crbug.com/667370 as a perf test, so we can track
improvements to it.

R=chrishtr@chromium.org

Bug: 667370
Change-Id: I5b9a4854b21de4fc26a5f515154a93d9148890ef
Reviewed-on: https://chromium-review.googlesource.com/c/1357543Reviewed-by: default avatarChris Harrelson <chrishtr@chromium.org>
Commit-Queue: Christian Biesinger <cbiesinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#615374}
parent 85061cd6
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third_party/blink/perf_tests/layout/contain-content-style-change.html 0 → 100644
View file @ 234c9091
<!DOCTYPE html>
<script src="../resources/runner.js"></script>
<title>Contain layout performance</title>
<style>
#listContainer {
margin: 0 auto;
width: 600px;
border: 1px solid blue;
contain: content;
}
.listItem {
outline: 2px solid green;
padding: .4em;
overflow: hidden;
contain: content;
}
</style>
</head>
<body>
<div id="listContainer"></div>
<script>
const LOREM_IPSUM = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
let listContainer = null;
function createListItem() {
let item = document.createElement("div");
item.classList.add("listItem");
item.textContent = LOREM_IPSUM.substr(
Math.floor(Math.random()*100), Math.floor(Math.random()*200)+150);
listContainer.appendChild(item);
}
var height = 0;
function runTest() {
height++;
listContainer.firstChild.style.height = height + "px";
if (height > 50)
height = 0;
}
function setupTest() {
listContainer = document.getElementById("listContainer");
for (let i = 0; i < 5000; ++i) {
createListItem();
}
PerfTestRunner.forceLayout();
}
setupTest();
PerfTestRunner.measureFrameTime({
description: "Measures performance of changing the height of a child of a contain:contents object.",
iterationCount: 50,
run: runTest
});
</script>
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