[code-simplifier] Simplify benchmark --parentProcess flow

[github-actions]

Overview

This PR applies small readability-focused simplifications to the newly-added benchmark runner code, without changing behavior.

Files simplified

• tools/benchmark/src/mocha/benchmarkIt.ts
  • Remove redundant async/await wrappers when forwarding promises.
• tools/benchmark/src/mocha/runner.ts
  • Extract small helpers (escapeRegExp, reusable regexes) and use RegExp.test for clearer intent.

Changes based on

• Fixed --parentProcess mode partial match #26948 (commit f7ff4ec) — --parentProcess exact-match filtering fix.

Testing

• pnpm -C tools/benchmark lint
• pnpm -C tools/benchmark build:compile
• pnpm -C tools/benchmark test

References:

• §24070177041

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Show patch preview (88 of 88 lines)

From f0db82e1be4eea4c7b68d65ac4fca07a2c5c6416 Mon Sep 17 00:00:00 2001
From: code-simplifier <code-simplifier@users.noreply.github.com>
Date: Tue, 7 Apr 2026 07:47:18 +0000
Subject: [PATCH] Simplify benchmark parent process handling

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 tools/benchmark/src/mocha/benchmarkIt.ts |  8 +++-----
 tools/benchmark/src/mocha/runner.ts      | 15 +++++++++++----
 2 files changed, 14 insertions(+), 9 deletions(-)

diff --git a/tools/benchmark/src/mocha/benchmarkIt.ts b/tools/benchmark/src/mocha/benchmarkIt.ts
index 99babd4..601a720 100644
--- a/tools/benchmark/src/mocha/benchmarkIt.ts
+++ b/tools/benchmark/src/mocha/benchmarkIt.ts
@@ -40,11 +40,9 @@ export function benchmarkIt(options: BenchmarkOptions): Test {
 	const test = itFunction(title, async () => {
 		// Emits the "benchmark end" event with the result
 		await emitResultsMocha(
-			async () =>
-				await supportParentProcess(
-					test.fullTitle(),
-					useParentProcess && !isChildProcess,
-					async () => await options.run(timer),
+			() =>
+				supportParentProcess(test.fullTitle(), useParentProcess && !isChildProcess, () =>
+					options.run(timer),
 				),
 			test,
 		);
diff --git a/tools/benchmark/src/mocha/runner.ts b/tools/benchmark/src/mocha/runner.ts
index 48dfe3f..baf3f35 100644
--- a/tools/benchmark/src/mocha/runner.ts
+++ b/tools/benchmark/src/mocha/runner.ts
@@ -13,6 +13,13 @@ import {
 import { captureResults } from "../benchmarkAuthoringUtilities.js";
 import { fail } from "../assert.js";
 
+const inspectOrDebugArgRegex = /^(--inspect|--debug)/;
+const jsonLineRegex = /^(\[.*\]|\{.*\})$/;
+
+function escapeRegExp(value: string): string {
+	return value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
+}
+
 /**
  * Wrapper for the contents of a mocha test that supports running in a child process and emitting results to the mocha reporter.
  */
@@ -21,7 +28,7 @@ export async function supportParentProcess(
 	isParentProcess: boolean,
 	run:
... (truncated)