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"use strict";
/* globals AppConstants, Services */
ChromeUtils.defineESModuleGetters(this, {
});
var OPENER_DELAY = 1000; // ms delay between tests
async function openDelay(win) {
return new Promise(resolve => {
win.setTimeout(resolve, OPENER_DELAY);
});
}
function waitForBrowserPaint() {
return new Promise(resolve => {
let observer = {
observe(doc) {
if (
!doc.location ||
doc.location.href != AppConstants.BROWSER_CHROME_URL
) {
return;
}
Services.obs.removeObserver(observer, "document-element-inserted");
doc.ownerGlobal.addEventListener(
"MozAfterPaint",
evt => {
resolve(
doc.ownerGlobal.performance.timing.fetchStart + evt.paintTimeStamp
);
},
{ once: true }
);
},
};
Services.obs.addObserver(observer, "document-element-inserted");
});
}
async function startTest(context) {
TalosParentProfiler.subtestStart("twinopen");
Cu.forceGC();
Cu.forceCC();
Cu.forceShrinkingGC();
let win = context.appWindow;
await openDelay(win);
let mozAfterPaint = waitForBrowserPaint();
// We have to compare time measurements across two windows so we must use
// the absolute time.
let start = win.performance.timing.fetchStart + win.performance.now();
let newWin = win.OpenBrowserWindow();
let end = await mozAfterPaint;
TalosParentProfiler.subtestEnd("twinopen");
newWin.close();
return end - start;
}
/* globals ExtensionAPI */
this.twinopen = class extends ExtensionAPI {
getAPI(context) {
return {
twinopen: {
startTest: () => startTest(context),
},
};
}
};