LayoutTests/performance-api/performance-observer-callback-after-gc.html - WebKit - Git at Google

 <!DOCTYPE HTML>
 <html>
 <head>
 <script src="../resources/js-test-pre.js"></script>
 </head>
 <body>
 <script>
 description("Ensure PerformanceObserver callback fires even if the JS does not keep the PerformanceObserver object alive.");
 window.jsTestIsAsync = true;

 let receivedEntries = [];

 let observer = new PerformanceObserver((list) => {
     for (let mark of list.getEntries())
         receivedEntries.push(mark.name);

     if (receivedEntries.length == 3) {
         for (let name of receivedEntries)
             testPassed(name);
        finishJSTest();
     }
 });
 observer.observe({entryTypes: ["mark"]});
 observer = null;
 gc();

 // ---

 performance.mark("mark1");

 setTimeout(() => {
     gc();
     performance.mark("mark2");
     performance.mark("mark3");
 }, 50);
 </script>
 <script src="../resources/js-test-post.js"></script>
 </body>
 </html>
	<!DOCTYPE HTML>
	<html>
	<head>
	<script src="../resources/js-test-pre.js"></script>
	</head>
	<body>
	<script>
	description("Ensure PerformanceObserver callback fires even if the JS does not keep the PerformanceObserver object alive.");
	window.jsTestIsAsync = true;

	let receivedEntries = [];

	let observer = new PerformanceObserver((list) => {
	for (let mark of list.getEntries())
	receivedEntries.push(mark.name);

	if (receivedEntries.length == 3) {
	for (let name of receivedEntries)
	testPassed(name);
	finishJSTest();
	}
	});
	observer.observe({entryTypes: ["mark"]});
	observer = null;
	gc();

	// ---

	performance.mark("mark1");

	setTimeout(() => {
	gc();
	performance.mark("mark2");
	performance.mark("mark3");
	}, 50);
	</script>
	<script src="../resources/js-test-post.js"></script>
	</body>
	</html>