From 786d68e3be3a41a0eef5c90ba2f61cafee3eb0ce Mon Sep 17 00:00:00 2001
From: Pavel Feldman <pavel.feldman@gmail.com>
Date: Thu, 1 Oct 2026 13:50:20 -0700
Subject: [PATCH] chore: start v8 profiler from bootstrap via PW_PROFILE_DIR

- bootstrap.ts starts the V8 CPU profiler when PW_PROFILE_DIR is set and
  writes <script>[-<command>]-<pid>.cpuprofile on exit.
- Replaces PWTEST_PROFILE_DIR and the per-process profiling in the test
  runner, workers and run-server connections.
- All process.exit calls go through processExit() from bootstrap, which
  exits once the profile is written; processExit is lint-restricted like
  process.exit.
- coreBundle loads bootstrap as an external module instead of bundling a
  second copy; CLI entry points, including cli-client, load it first.
---
 eslint.config.mjs                             | 10 ++++
 packages/playwright-chromium/cli.js           |  1 +
 packages/playwright-core/cli.js               |  1 +
 packages/playwright-core/src/DEPS.list        |  3 ++
 packages/playwright-core/src/bootstrap.ts     | 41 +++++++++++++++
 packages/playwright-core/src/cli/DEPS.list    |  1 -
 packages/playwright-core/src/cli/program.ts   |  1 -
 .../src/remote/playwrightConnection.ts        |  6 ---
 .../src/server/registry/DEPS.list             |  1 +
 .../server/registry/oopDownloadBrowserMain.ts | 13 ++---
 .../src/tools/cli-client/DEPS.list            |  7 +++
 .../src/tools/cli-client/cli.ts               |  5 +-
 .../src/tools/cli-client/output.ts            | 50 ++++++++++++-------
 .../src/tools/cli-client/program.ts           |  9 ++--
 .../src/tools/cli-daemon/DEPS.list            |  1 +
 .../src/tools/cli-daemon/program.ts           |  5 +-
 .../playwright-core/src/tools/mcp/watchdog.ts |  9 ++--
 packages/playwright-firefox/cli.js            |  1 +
 packages/playwright-webkit/cli.js             |  1 +
 packages/playwright/src/cli/testActions.ts    |  5 --
 packages/playwright/src/common/ipc.ts         |  1 -
 packages/playwright/src/common/process.ts     | 16 ++----
 packages/playwright/src/runner/processHost.ts |  1 -
 packages/utils/DEPS.list                      |  3 ++
 packages/utils/index.ts                       |  1 -
 packages/utils/processLauncher.ts             | 13 ++---
 packages/utils/profiler.ts                    | 48 ------------------
 utils/build/build.js                          |  4 ++
 28 files changed, 142 insertions(+), 116 deletions(-)
 delete mode 100644 packages/utils/profiler.ts

diff --git a/eslint.config.mjs b/eslint.config.mjs
index 0f1dfe15522ee..0bd0d7837dbb6 100644
--- a/eslint.config.mjs
+++ b/eslint.config.mjs
@@ -296,6 +296,11 @@ const reactFiles = [
   `packages/web/src/**/*.tsx`,
 ];
 
+const noProcessExitSyntax = {
+  selector: "CallExpression[callee.name='processExit']",
+  message: "Please use gracefullyProcessExitDoNotHang function to exit the process.",
+};
+
 function reactPackageSection(packageName) {
   return {
     files: [
@@ -348,6 +353,10 @@ export default [
         { object: "process", property: "stdout" },
         { object: "process", property: "stderr" },
       ],
+      "no-restricted-syntax": [
+        "error",
+        noProcessExitSyntax,
+      ],
     },
   },
   {
@@ -424,6 +433,7 @@ export default [
       ],
       "no-restricted-syntax": [
         "error",
+        noProcessExitSyntax,
         {
           selector: "TSAsExpression > TSAnyKeyword",
           message: "Avoid 'as any' — risk of accidentally casting to client interfaces. Use a precise type or add an eslint-disable with justification.",
diff --git a/packages/playwright-chromium/cli.js b/packages/playwright-chromium/cli.js
index 1ab7f499d77e6..c50f2643facfb 100755
--- a/packages/playwright-chromium/cli.js
+++ b/packages/playwright-chromium/cli.js
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 
+require('playwright-core/lib/bootstrap');
 const { program } = require('playwright-core/lib/utilsBundle');
 const { libCli } = require('playwright-core/lib/coreBundle');
 libCli.decorateProgram(program);
diff --git a/packages/playwright-core/cli.js b/packages/playwright-core/cli.js
index f275a03346a89..7dbfc530629d9 100755
--- a/packages/playwright-core/cli.js
+++ b/packages/playwright-core/cli.js
@@ -14,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+require('./lib/bootstrap');
 const { libCli, libCliTestStub } = require('./lib/coreBundle');
 const { program } = require('./lib/utilsBundle');
 libCli.decorateProgram(program);
diff --git a/packages/playwright-core/src/DEPS.list b/packages/playwright-core/src/DEPS.list
index 264d291549e24..9f5059ca1eaf8 100644
--- a/packages/playwright-core/src/DEPS.list
+++ b/packages/playwright-core/src/DEPS.list
@@ -49,6 +49,9 @@ node_modules/stoppable
 node_modules/ws
 node_modules/yaml
 
+[bootstrap.ts]
+"strict"
+
 [package.ts]
 "strict"
 
diff --git a/packages/playwright-core/src/bootstrap.ts b/packages/playwright-core/src/bootstrap.ts
index b981e3c1a74b8..c3ff509cb887b 100644
--- a/packages/playwright-core/src/bootstrap.ts
+++ b/packages/playwright-core/src/bootstrap.ts
@@ -31,6 +31,47 @@ if (major < minimumMajorNodeVersion) {
   process.exit(1);
 }
 
+let stopProfiling = (callback: () => void) => callback();
+
+if (process.env.PW_PROFILE_DIR) {
+  const fs: typeof import('fs') = require('fs');
+  const path: typeof import('path') = require('path');
+  const { Session }: typeof import('inspector') = require('inspector');
+
+  const profileDir = path.resolve(process.env.PW_PROFILE_DIR);
+  const script = process.argv[1] ? path.basename(process.argv[1], path.extname(process.argv[1])) : 'node';
+  const command = /^[a-z][\w-]*$/i.test(process.argv[2] ?? '') ? process.argv[2] : undefined;
+  const profileName = [script, command, process.pid].filter(Boolean).join('-');
+
+  const session = new Session();
+  session.connect();
+  session.post('Profiler.enable');
+  session.post('Profiler.start');
+
+  stopProfiling = callback => {
+    stopProfiling = callback => callback();
+    session.post('Profiler.stop', (error, result) => {
+      try {
+        if (!error) {
+          fs.mkdirSync(profileDir, { recursive: true });
+          fs.writeFileSync(path.join(profileDir, profileName + '.cpuprofile'), JSON.stringify(result.profile));
+        }
+      } finally {
+        callback();
+      }
+    });
+  };
+  process.on('beforeExit', () => stopProfiling(() => {}));
+}
+
+export function processExit(code?: number): never {
+  stopProfiling(() => {
+    // eslint-disable-next-line no-restricted-properties
+    process.exit(code);
+  });
+  return undefined as never;
+}
+
 if (process.env.PW_INSTRUMENT_MODULES) {
   const Module = require('module');
   const originalLoad = Module._load;
diff --git a/packages/playwright-core/src/cli/DEPS.list b/packages/playwright-core/src/cli/DEPS.list
index f71bab90aa05f..9f6a1f2cc3114 100644
--- a/packages/playwright-core/src/cli/DEPS.list
+++ b/packages/playwright-core/src/cli/DEPS.list
@@ -10,7 +10,6 @@
 ../tools/cli-client/program.ts
 ../tools/mcp/program.ts
 ../tools/trace/traceCli.ts
-../bootstrap.ts
 node_modules/commander
 node_modules/debug
 node_modules/dotenv
diff --git a/packages/playwright-core/src/cli/program.ts b/packages/playwright-core/src/cli/program.ts
index cec10813fc804..7b4d685411982 100644
--- a/packages/playwright-core/src/cli/program.ts
+++ b/packages/playwright-core/src/cli/program.ts
@@ -16,7 +16,6 @@
 
 /* eslint-disable no-console */
 
-import '../bootstrap';
 import { program } from 'commander';
 import { gracefullyProcessExitDoNotHang } from '@utils/processLauncher';
 import { getPackageManagerExecCommand } from '@utils/env';
diff --git a/packages/playwright-core/src/remote/playwrightConnection.ts b/packages/playwright-core/src/remote/playwrightConnection.ts
index f03f7a1d8b3e9..e978b85ce033b 100644
--- a/packages/playwright-core/src/remote/playwrightConnection.ts
+++ b/packages/playwright-core/src/remote/playwrightConnection.ts
@@ -14,7 +14,6 @@
  * limitations under the License.
  */
 
-import { startProfiling, stopProfiling } from '@utils/profiler';
 import { debugLogger } from '@utils/debugLogger';
 import { monotonicTime } from '@isomorphic/time';
 import { Semaphore } from '@isomorphic/semaphore';
@@ -39,13 +38,11 @@ export class PlaywrightConnection {
   private _id: string;
   private _onDisconnectPromise: Promise<void> | undefined;
   private _root: DispatcherScope;
-  private _profileName: string;
 
   constructor(semaphore: Semaphore, transport: ServerTransport, controller: boolean, playwright: Playwright, initialize: () => Promise<PlaywrightInitializeResult>, id: string) {
     this._transport = transport;
     this._semaphore = semaphore;
     this._id = id;
-    this._profileName = new Date().toISOString();
 
     const lock = this._semaphore.acquire();
 
@@ -89,8 +86,6 @@ export class PlaywrightConnection {
     }
 
     this._root = new RootDispatcher(this._dispatcherConnection, async (scope, params) => {
-      await startProfiling();
-
       const options = await initialize();
       if (options.preLaunchedBrowser) {
         const browser = options.preLaunchedBrowser;
@@ -130,7 +125,6 @@ export class PlaywrightConnection {
     debugLogger.log('server', `[${this._id}] starting cleanup`);
     for (const cleanup of this._cleanups)
       await cleanup().catch(() => {});
-    await stopProfiling(this._profileName);
     this._semaphore.release();
     debugLogger.log('server', `[${this._id}] finished cleanup`);
   }
diff --git a/packages/playwright-core/src/server/registry/DEPS.list b/packages/playwright-core/src/server/registry/DEPS.list
index a6aa9a2c65cd0..f66d3c07b9205 100644
--- a/packages/playwright-core/src/server/registry/DEPS.list
+++ b/packages/playwright-core/src/server/registry/DEPS.list
@@ -1,6 +1,7 @@
 [*]
 @utils/**
 @isomorphic/**
+../../bootstrap.ts
 ../../package.ts
 ../utils.ts
 ../userAgent.ts
diff --git a/packages/playwright-core/src/server/registry/oopDownloadBrowserMain.ts b/packages/playwright-core/src/server/registry/oopDownloadBrowserMain.ts
index 06acef879795d..e7a302b33820a 100644
--- a/packages/playwright-core/src/server/registry/oopDownloadBrowserMain.ts
+++ b/packages/playwright-core/src/server/registry/oopDownloadBrowserMain.ts
@@ -22,6 +22,7 @@ import { getAsBooleanFromENV } from '@utils/env';
 import { httpRequest } from '@utils/network';
 import { removeFolders } from '@utils/fileUtils';
 import { extractZip } from '@utils/third_party/extractZip';
+import { processExit } from '../../bootstrap';
 
 export type DownloadParams = {
   title: string;
@@ -133,17 +134,17 @@ export function runOopDownloadBrowserMain() {
     if (method === 'download') {
       try {
         await main(params);
-        // eslint-disable-next-line no-restricted-properties
-        process.exit(0);
+        // eslint-disable-next-line no-restricted-syntax
+        processExit(0);
       } catch (e) {
         // eslint-disable-next-line no-console
         console.error(e);
-        // eslint-disable-next-line no-restricted-properties
-        process.exit(1);
+        // eslint-disable-next-line no-restricted-syntax
+        processExit(1);
       }
     }
   });
 
-  // eslint-disable-next-line no-restricted-properties
-  process.on('disconnect', () => { process.exit(0); });
+  // eslint-disable-next-line no-restricted-syntax
+  process.on('disconnect', () => { processExit(0); });
 }
diff --git a/packages/playwright-core/src/tools/cli-client/DEPS.list b/packages/playwright-core/src/tools/cli-client/DEPS.list
index 07864bbb60b55..7010d5ff3550c 100644
--- a/packages/playwright-core/src/tools/cli-client/DEPS.list
+++ b/packages/playwright-core/src/tools/cli-client/DEPS.list
@@ -1,5 +1,11 @@
+[cli.ts]
+"strict"
+../../bootstrap.ts
+./program.ts
+
 [program.ts]
 "strict"
+../../bootstrap.ts
 ../../package.ts
 ../../serverRegistry.ts
 ./channelSessions.ts
@@ -10,6 +16,7 @@
 
 [output.ts]
 "strict"
+../../bootstrap.ts
 ../utils/extension.ts
 ./channelSessions.ts
 
diff --git a/packages/playwright-core/src/tools/cli-client/cli.ts b/packages/playwright-core/src/tools/cli-client/cli.ts
index 6db3e40ee050b..cda0cc4cfe152 100644
--- a/packages/playwright-core/src/tools/cli-client/cli.ts
+++ b/packages/playwright-core/src/tools/cli-client/cli.ts
@@ -14,11 +14,12 @@
  * limitations under the License.
  */
 
+import { processExit } from '../../bootstrap';
 import { program } from './program';
 
 program().catch(e => {
   /* eslint-disable no-console */
   console.error(e.message);
-  /* eslint-disable no-restricted-properties */
-  process.exit(1);
+  // eslint-disable-next-line no-restricted-syntax
+  processExit(1);
 });
diff --git a/packages/playwright-core/src/tools/cli-client/output.ts b/packages/playwright-core/src/tools/cli-client/output.ts
index afcac0e728239..f481fcd776a69 100644
--- a/packages/playwright-core/src/tools/cli-client/output.ts
+++ b/packages/playwright-core/src/tools/cli-client/output.ts
@@ -15,11 +15,11 @@
  */
 
 /* eslint-disable no-console */
-/* eslint-disable no-restricted-properties */
 
 import path from 'path';
 
 import { playwrightExtensionInstallUrl } from '../utils/extension';
+import { processExit } from '../../bootstrap';
 
 import type { ChannelSession } from './channelSessions';
 import type { BrowserDescriptor } from '../../serverRegistry';
@@ -88,48 +88,56 @@ export class TextOutput implements Output {
   errorUnknownCommand(name: string | undefined, globalHelp: string): never {
     console.error(`Unknown command: ${name}\n`);
     console.log(globalHelp);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorUnknownOption(opts: string[], commandHelp: string): never {
     console.error(`Unknown option${opts.length > 1 ? 's' : ''}: ${opts.map(f => `--${f}`).join(', ')}`);
     console.log('');
     console.log(commandHelp);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorTooManyArguments(expected: number, received: number, commandHelp: string): never {
     console.error(`error: too many arguments: expected ${expected}, received ${received}`);
     console.log('');
     console.log(commandHelp);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorAttachConflict(): never {
     console.error(`Error: only one of [name], --cdp, --endpoint, or --extension can be specified`);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorDetachNotAttached(session: string): never {
     console.error(`Error: session '${session}' was not attached; use \`playwright-cli${session !== 'default' ? ` -s=${session}` : ''} close\` to stop it.`);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorBrowserNotOpenForTool(session: string): never {
     console.log(`The browser '${session}' is not open, please run open first`);
     console.log('');
     console.log(`  playwright-cli${session !== 'default' ? ` -s=${session}` : ''} open [params]`);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorAttachNoTarget(): never {
     console.error(`Error: no target specified for attach command; use one of [name], --cdp, --endpoint, or --extension to specify the target to attach to.`);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorInstallGlobalRequiresSkills(): never {
     console.error(`Error: --global requires --skills`);
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   list({ all, browsers, servers, channelSessions }: ListData): void {
@@ -280,42 +288,50 @@ export class JsonOutput implements Output {
 
   errorUnknownCommand(name: string | undefined, _globalHelp: string): never {
     this._emit({ isError: true, error: `Unknown command: ${name}` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorUnknownOption(opts: string[], _commandHelp: string): never {
     this._emit({ isError: true, error: `Unknown option${opts.length > 1 ? 's' : ''}: ${opts.map(f => `--${f}`).join(', ')}` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorTooManyArguments(expected: number, received: number, _commandHelp: string): never {
     this._emit({ isError: true, error: `error: too many arguments: expected ${expected}, received ${received}` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorAttachConflict(): never {
     this._emit({ isError: true, error: `only one of [name], --cdp, --endpoint, or --extension can be specified` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorDetachNotAttached(session: string): never {
     this._emit({ isError: true, error: `session '${session}' was not attached; use close to stop it.` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorBrowserNotOpenForTool(session: string): never {
     this._emit({ isError: true, error: `The browser '${session}' is not open, please run open first` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorAttachNoTarget(): never {
     this._emit({ isError: true, error: `no target specified for attach command; use one of [name], --cdp, --endpoint, or --extension to specify the target to attach to.` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   errorInstallGlobalRequiresSkills(): never {
     this._emit({ isError: true, error: `--global requires --skills` });
-    return process.exit(1);
+    // eslint-disable-next-line no-restricted-syntax
+    return processExit(1);
   }
 
   list({ all, browsers, servers, channelSessions }: ListData): void {
diff --git a/packages/playwright-core/src/tools/cli-client/program.ts b/packages/playwright-core/src/tools/cli-client/program.ts
index 3279731070754..246a21a7a2d7d 100644
--- a/packages/playwright-core/src/tools/cli-client/program.ts
+++ b/packages/playwright-core/src/tools/cli-client/program.ts
@@ -14,8 +14,6 @@
  * limitations under the License.
  */
 
-/* eslint-disable no-restricted-properties */
-
 import { execSync, spawn } from 'child_process';
 
 import crypto from 'crypto';
@@ -29,6 +27,7 @@ import { Session } from './session';
 import { libPath } from '../../package';
 import { serverRegistry } from '../../serverRegistry';
 import { minimist } from './minimist';
+import { processExit } from '../../bootstrap';
 
 import type { ListData, ListedBrowser, Output } from './output';
 import type { ClientInfo, SessionFile } from './registry';
@@ -97,7 +96,8 @@ export async function program(options?: { embedderVersion?: string}) {
 
   if (args.version || args.v) {
     output.version(options?.embedderVersion ?? clientInfo.version);
-    process.exit(0);
+    // eslint-disable-next-line no-restricted-syntax
+    processExit(0);
   }
 
   const command = commandName && help.commands[commandName];
@@ -111,7 +111,8 @@ export async function program(options?: { embedderVersion?: string}) {
       lines.push(help.global);
       output.help(lines.join('\n\n'));
     }
-    process.exit(0);
+    // eslint-disable-next-line no-restricted-syntax
+    processExit(0);
   }
 
   if (!command)
diff --git a/packages/playwright-core/src/tools/cli-daemon/DEPS.list b/packages/playwright-core/src/tools/cli-daemon/DEPS.list
index af8874ca8887f..ed4ad436c21d1 100644
--- a/packages/playwright-core/src/tools/cli-daemon/DEPS.list
+++ b/packages/playwright-core/src/tools/cli-daemon/DEPS.list
@@ -1,4 +1,5 @@
 [*]
+../../bootstrap.ts
 ../../package.ts
 ../utils/socketConnection.ts
 ../utils/installSkills.ts
diff --git a/packages/playwright-core/src/tools/cli-daemon/program.ts b/packages/playwright-core/src/tools/cli-daemon/program.ts
index e96685479c525..1e2b39af7befd 100644
--- a/packages/playwright-core/src/tools/cli-daemon/program.ts
+++ b/packages/playwright-core/src/tools/cli-daemon/program.ts
@@ -29,6 +29,7 @@ import * as configUtils from '../mcp/config';
 import { createClientInfo } from '../cli-client/registry';
 import { installSkills } from '../utils/installSkills';
 import { registry as browserRegistry } from '../../server/registry/index';
+import { processExit } from '../../bootstrap';
 import type { Command } from 'commander';
 
 export function decorateProgram(program: Command) {
@@ -102,8 +103,8 @@ export async function initWorkspace(initSkills: string | undefined, initSkillsGl
       await installSkills(['playwright-cli'], target, { global: globalSkills });
     } catch (error) {
       console.error('❌', error instanceof Error ? error.message : error);
-      // eslint-disable-next-line no-restricted-properties
-      process.exit(1);
+      // eslint-disable-next-line no-restricted-syntax
+      processExit(1);
     }
   }
 
diff --git a/packages/playwright-core/src/tools/mcp/watchdog.ts b/packages/playwright-core/src/tools/mcp/watchdog.ts
index 0f947ee7ca8bf..e2ee1afad26d5 100644
--- a/packages/playwright-core/src/tools/mcp/watchdog.ts
+++ b/packages/playwright-core/src/tools/mcp/watchdog.ts
@@ -16,6 +16,7 @@
 
 import { gracefullyCloseAll, gracefullyCloseSet } from '@utils/processLauncher';
 import { testDebug } from './log';
+import { processExit } from '../../bootstrap';
 
 export function setupExitWatchdog() {
   let isExiting = false;
@@ -23,12 +24,12 @@ export function setupExitWatchdog() {
     if (isExiting)
       return;
     isExiting = true;
-    // eslint-disable-next-line no-restricted-properties
-    setTimeout(() => process.exit(0), 15000);
+    // eslint-disable-next-line no-restricted-syntax
+    setTimeout(() => processExit(0), 15000);
     testDebug('gracefully closing ' + gracefullyCloseSet.size);
     await gracefullyCloseAll();
-    // eslint-disable-next-line no-restricted-properties
-    process.exit(0);
+    // eslint-disable-next-line no-restricted-syntax
+    processExit(0);
   };
 
   process.stdin.on('close', () => handleExit('close'));
diff --git a/packages/playwright-firefox/cli.js b/packages/playwright-firefox/cli.js
index 1ab7f499d77e6..c50f2643facfb 100755
--- a/packages/playwright-firefox/cli.js
+++ b/packages/playwright-firefox/cli.js
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 
+require('playwright-core/lib/bootstrap');
 const { program } = require('playwright-core/lib/utilsBundle');
 const { libCli } = require('playwright-core/lib/coreBundle');
 libCli.decorateProgram(program);
diff --git a/packages/playwright-webkit/cli.js b/packages/playwright-webkit/cli.js
index 1ab7f499d77e6..c50f2643facfb 100755
--- a/packages/playwright-webkit/cli.js
+++ b/packages/playwright-webkit/cli.js
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 
+require('playwright-core/lib/bootstrap');
 const { program } = require('playwright-core/lib/utilsBundle');
 const { libCli } = require('playwright-core/lib/coreBundle');
 libCli.decorateProgram(program);
diff --git a/packages/playwright/src/cli/testActions.ts b/packages/playwright/src/cli/testActions.ts
index c03abcff8064f..b6fd25facb05c 100644
--- a/packages/playwright/src/cli/testActions.ts
+++ b/packages/playwright/src/cli/testActions.ts
@@ -18,7 +18,6 @@ import fs from 'fs';
 import path from 'path';
 
 import { gracefullyProcessExitDoNotHang } from '@utils/processLauncher';
-import { startProfiling, stopProfiling } from '@utils/profiler';
 
 import { builtInReporters, configLoader, ipc } from '../common';
 import { base, projectUtils, testServer, watchMode, testRunner, runnerReporters } from '../runner';
@@ -26,7 +25,6 @@ import type { ReporterDescription } from '../../types/test';
 import type { TestRunOptions } from '../runner/tasks';
 
 export async function runTests(args: string[], opts: { [key: string]: any }) {
-  await startProfiling();
   const cliOverrides = overridesFromOptions(opts);
   cliOverrides.argv = process.argv;
 
@@ -62,7 +60,6 @@ export async function runTests(args: string[], opts: { [key: string]: any }) {
       project: opts.project || undefined,
       reporter: Array.isArray(opts.reporter) ? opts.reporter : opts.reporter ? [opts.reporter] : undefined,
     });
-    await stopProfiling('runner');
     const exitCode = status === 'interrupted' ? 130 : (status === 'passed' ? 0 : 1);
     gracefullyProcessExitDoNotHang(exitCode);
     return;
@@ -80,14 +77,12 @@ export async function runTests(args: string[], opts: { [key: string]: any }) {
           grep: opts.grep
         }
     );
-    await stopProfiling('runner');
     const exitCode = status === 'interrupted' ? 130 : (status === 'passed' ? 0 : 1);
     gracefullyProcessExitDoNotHang(exitCode);
     return;
   }
 
   const status = await testRunner.runAllTestsWithConfig(config, options);
-  await stopProfiling('runner');
   const exitCode = status === 'interrupted' ? 130 : (status === 'passed' ? 0 : 1);
   gracefullyProcessExitDoNotHang(exitCode);
 }
diff --git a/packages/playwright/src/common/ipc.ts b/packages/playwright/src/common/ipc.ts
index 872e06b30eabc..512a919b5d285 100644
--- a/packages/playwright/src/common/ipc.ts
+++ b/packages/playwright/src/common/ipc.ts
@@ -58,7 +58,6 @@ export type SerializedConfig = {
 
 export type ProcessInitParams = {
   timeOrigin: number;
-  processName: string;
 };
 
 export type WorkerInitParams = {
diff --git a/packages/playwright/src/common/process.ts b/packages/playwright/src/common/process.ts
index 1d65cf1146d0b..8e6b54b930404 100644
--- a/packages/playwright/src/common/process.ts
+++ b/packages/playwright/src/common/process.ts
@@ -14,11 +14,10 @@
  * limitations under the License.
  */
 
-import 'playwright-core/lib/bootstrap';
+import { processExit } from 'playwright-core/lib/bootstrap';
 
 import { ManualPromise } from '@isomorphic/manualPromise';
 import { setTimeOrigin } from '@isomorphic/time';
-import { startProfiling, stopProfiling } from '@utils/profiler';
 import { setBoxedStackPrefixes } from '@utils/stackTrace';
 
 import { packageRoot } from '../package';
@@ -61,7 +60,6 @@ let gracefullyCloseCalled = false;
 let forceExitInitiated = false;
 
 let processRunner: ProcessRunner | undefined;
-let processName: string | undefined;
 const startingEnv = { ...process.env };
 setBoxedStackPrefixes([packageRoot]);
 
@@ -75,10 +73,8 @@ export function startProcessRunner(create: (params: any) => ProcessRunner) {
   process.on('message', async (message: any) => {
     if (message.method === '__init__') {
       const { processParams, runnerParams } = message.params as { processParams: ProcessInitParams, runnerParams: any };
-      void startProfiling();
       setTimeOrigin(processParams.timeOrigin);
       processRunner = create(runnerParams);
-      processName = processParams.processName;
       return;
     }
     if (message.method === '__stop__') {
@@ -111,8 +107,8 @@ async function gracefullyCloseAndExit(forceExit: boolean) {
   if (forceExit && !forceExitInitiated) {
     forceExitInitiated = true;
     // Force exit after 30 seconds.
-    // eslint-disable-next-line no-restricted-properties
-    setTimeout(() => process.exit(0), kForceExitTimeout);
+    // eslint-disable-next-line no-restricted-syntax
+    setTimeout(() => processExit(0), kForceExitTimeout);
   }
   if (!gracefullyCloseCalled) {
     gracefullyCloseCalled = true;
@@ -123,10 +119,8 @@ async function gracefullyCloseAndExit(forceExit: boolean) {
     // Meanwhile, try to gracefully shutdown.
     await processRunner?.gracefullyClose().catch(() => {});
     clearInterval(heartbeat);
-    if (processName)
-      await stopProfiling(processName).catch(() => {});
-    // eslint-disable-next-line no-restricted-properties
-    process.exit(0);
+    // eslint-disable-next-line no-restricted-syntax
+    processExit(0);
   }
 }
 
diff --git a/packages/playwright/src/runner/processHost.ts b/packages/playwright/src/runner/processHost.ts
index ea3b589aab857..38a3d367307e6 100644
--- a/packages/playwright/src/runner/processHost.ts
+++ b/packages/playwright/src/runner/processHost.ts
@@ -128,7 +128,6 @@ export class ProcessHost extends EventEmitter {
       return error;
 
     const processParams: ipc.ProcessInitParams = {
-      processName: this._processName,
       timeOrigin: timeOrigin(),
     };
 
diff --git a/packages/utils/DEPS.list b/packages/utils/DEPS.list
index db4f4ba44dcb6..86d85869ee977 100644
--- a/packages/utils/DEPS.list
+++ b/packages/utils/DEPS.list
@@ -13,6 +13,9 @@ node_modules/ws
 node_modules/yauzl
 node_modules/yazl
 
+[processLauncher.ts]
+../playwright-core/src/bootstrap.ts
+
 [comparators.ts]
 ./image_tools
 ./third_party/pixelmatch
diff --git a/packages/utils/index.ts b/packages/utils/index.ts
index 5231fef6e520c..8c06239ed5149 100644
--- a/packages/utils/index.ts
+++ b/packages/utils/index.ts
@@ -28,7 +28,6 @@ export * from './hostPlatform';
 export * from './httpServer';
 export * from './network';
 export * from './processLauncher';
-export * from './profiler';
 export * from './serializedFS';
 export * from './socksProxy';
 export * from './stackTrace';
diff --git a/packages/utils/processLauncher.ts b/packages/utils/processLauncher.ts
index 662ac482d6c66..14a982d66e4d4 100644
--- a/packages/utils/processLauncher.ts
+++ b/packages/utils/processLauncher.ts
@@ -21,6 +21,7 @@ import * as readline from 'readline';
 
 import { removeFolders } from './fileUtils';
 import { isUnderTest } from './debug';
+import { processExit } from '../playwright-core/src/bootstrap';
 
 import type { SpawnOptions } from 'child_process';
 
@@ -60,8 +61,8 @@ export async function gracefullyCloseAll() {
 export function gracefullyProcessExitDoNotHang(code: number, onExit?: () => Promise<void>) {
   // Force exit after 30 seconds.
   const beforeExit = onExit ? () => onExit().catch(() => {}) : () => Promise.resolve();
-  // eslint-disable-next-line no-restricted-properties
-  const callback = () => beforeExit().then(() => process.exit(code));
+  // eslint-disable-next-line no-restricted-syntax
+  const callback = () => beforeExit().then(() => processExit(code));
 
   setTimeout(callback, 30000);
   // Meanwhile, try to gracefully close all browsers.
@@ -78,11 +79,11 @@ function sigintHandler() {
   const exitWithCode130 = () => {
     // Give tests a chance to see that launched process did exit and dispatch any async calls.
     if (isUnderTest()) {
-      // eslint-disable-next-line no-restricted-properties
-      setTimeout(() => process.exit(130), 1000);
+      // eslint-disable-next-line no-restricted-syntax
+      setTimeout(() => processExit(130), 1000);
     } else {
-      // eslint-disable-next-line no-restricted-properties
-      process.exit(130);
+      // eslint-disable-next-line no-restricted-syntax
+      processExit(130);
     }
   };
 
diff --git a/packages/utils/profiler.ts b/packages/utils/profiler.ts
deleted file mode 100644
index e414f0ff4a960..0000000000000
--- a/packages/utils/profiler.ts
+++ /dev/null
@@ -1,48 +0,0 @@
-/**
- * Copyright Microsoft Corporation. All rights reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import fs from 'fs';
-import path from 'path';
-
-const profileDir = process.env.PWTEST_PROFILE_DIR || '';
-
-let session: import('inspector').Session;
-
-export async function startProfiling() {
-  if (!profileDir)
-    return;
-
-  session = new (require('inspector').Session)();
-  session.connect();
-  await new Promise<void>(f => {
-    session.post('Profiler.enable', () => {
-      session.post('Profiler.start', f);
-    });
-  });
-}
-
-export async function stopProfiling(profileName: string) {
-  if (!profileDir)
-    return;
-
-  await new Promise<void>(f => session.post('Profiler.stop', (err, { profile }) => {
-    if (!err) {
-      fs.mkdirSync(profileDir, { recursive: true });
-      fs.writeFileSync(path.join(profileDir, profileName + '.json'), JSON.stringify(profile));
-    }
-    f();
-  }));
-}
diff --git a/utils/build/build.js b/utils/build/build.js
index 68de8fbcf6fae..2a8d24c64f2d8 100644
--- a/utils/build/build.js
+++ b/utils/build/build.js
@@ -710,6 +710,10 @@ steps.push(new EsbuildStep({
     name: 'externalize-utilsBundle',
     setup: build => build.onResolve({ filter: /utilsBundle/ },
         () => ({ path: './utilsBundle', external: true })),
+  }, {
+    name: 'externalize-bootstrap',
+    setup: build => build.onResolve({ filter: /\/bootstrap$/ },
+        args => path.resolve(args.resolveDir, args.path) === filePath('packages/playwright-core/src/bootstrap') ? { path: './bootstrap', external: true } : undefined),
   }, dynamicImportToRequirePlugin],
 }, [playwrightCoreSrc, ...commonUtilsSrc, filePath('packages/injected')]));