Revert "test: reduce flakiness of different-registry-per-thread"

This reverts commit 130398a.

PR-URL: #63244
Reviewed-By: Richard Lau <richard.lau@ibm.com>
Reviewed-By: Vinícius Lourenço Claro Cardoso <contact@viniciusl.com.br>
Reviewed-By: Stefan Stojanovic <stefan.stojanovic@janeasystems.com>

Author: aduh95

test/fixtures/process/different-registry-per-thread.mjs

@@ -1,26 +1,15 @@
 import { isMainThread, Worker } from 'node:worker_threads';
 
-const registeredRefs = [];
-
-const ref = { foo: 'foo' };
-registeredRefs.push(ref);
-
 if (isMainThread) {
-  process.finalization.register(ref, () => {
+  process.finalization.register({ foo: 'foo' }, () => {
     process.stdout.write('shutdown on main thread\n');
   });
 
   const worker = new Worker(import.meta.filename);
 
-  worker.on('error', (err) => {
-    // Referencing `registeredRefs` here to avoid `ref` being GCed before the worker exits.
-    console.log(registeredRefs);
-    throw err;
-  });
-
   worker.postMessage('ping');
 } else {
-  process.finalization.register(ref, () => {
+  process.finalization.register({ foo: 'bar' }, () => {
     process.stdout.write('shutdown on worker\n');
   });
 }

test/parallel/test-memory-usage.js

@@ -44,8 +44,6 @@ if (r.arrayBuffers > 0) {
   const after = process.memoryUsage();
   assert.ok(after.external - r.external >= size,
             `${after.external} - ${r.external} >= ${size}`);
-  // `arrayBuffers` is process-wide, so unrelated backing stores may be freed
-  // between the two snapshots. Check that the live ArrayBuffer is included.
-  assert.ok(after.arrayBuffers >= size,
-            `${after.arrayBuffers} >= ${size}`);
+  assert.strictEqual(after.arrayBuffers - r.arrayBuffers, size,
+                     `${after.arrayBuffers} - ${r.arrayBuffers} === ${size}`);
 }