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import { resolveOnTimeout } from './util.js';
/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
declare const Components: any;
/**
* Attempts to trigger JavaScript garbage collection, either using explicit methods if exposed
* (may be available in testing environments with special browser runtime flags set), or using
* some weird tricks to incur GC pressure. Adopted from the WebGL CTS.
*/
export async function attemptGarbageCollection(): Promise<void> {
/* eslint-disable-next-line @typescript-eslint/no-explicit-any */
const w: any = globalThis;
if (w.GCController) {
w.GCController.collect();
return;
}
if (w.opera && w.opera.collect) {
w.opera.collect();
return;
}
try {
w.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
.getInterface(Components.interfaces.nsIDOMWindowUtils)
.garbageCollect();
return;
} catch (e) {
// ignore any failure
}
if (w.gc) {
w.gc();
return;
}
if (w.CollectGarbage) {
w.CollectGarbage();
return;
}
let i: number;
function gcRec(n: number): void {
if (n < 1) return;
/* eslint-disable @typescript-eslint/restrict-plus-operands */
let temp: object | string = { i: 'ab' + i + i / 100000 };
/* eslint-disable @typescript-eslint/restrict-plus-operands */
temp = temp + 'foo';
temp; // dummy use of unused variable
gcRec(n - 1);
}
for (i = 0; i < 1000; i++) {
gcRec(10);
}
return resolveOnTimeout(35); // Let the event loop run a few frames in case it helps.
}