1 files changed, 58 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/common/util/collect_garbage.ts b/dom/webgpu/tests/cts/checkout/src/common/util/collect_garbage.ts
new file mode 100644
index 0000000000..670028d41c
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/common/util/collect_garbage.ts
@@ -0,0 +1,58 @@
+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.
+}