chore: align monotonicTime across processes (#35130)

packages/playwright-core/src/utils/isomorphic/time.ts

@@ -14,6 +14,18 @@
  * limitations under the License.
  */
 
-export function monotonicTime(): number {
+let _timeOrigin = performance.timeOrigin;
-  return Math.floor(performance.now() * 1000) / 1000;
+let _timeShift = 0;
+
+export function setTimeOrigin(origin: number) {
+  _timeOrigin = origin;
+  _timeShift = performance.timeOrigin - origin;
+}
+
+export function timeOrigin(): number {
+  return _timeOrigin;
+}
+
+export function monotonicTime(): number {
+  return Math.floor((performance.now() + _timeShift) * 1000) / 1000;
 }

packages/playwright/src/common/ipc.ts

@@ -55,6 +55,7 @@ export type SerializedConfig = {
 };
 
 export type ProcessInitParams = {
+  timeOrigin: number;
   processName: string;
 };
 

packages/playwright/src/common/process.ts

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { startProfiling, stopProfiling } from 'playwright-core/lib/utils';
+import { setTimeOrigin, startProfiling, stopProfiling } from 'playwright-core/lib/utils';
 
 import { serializeError } from '../util';
 import { registerESMLoader } from './esmLoaderHost';
@@ -69,6 +69,7 @@ process.on('message', async (message: any) => {
   if (message.method === '__init__') {
     const { processParams, runnerParams, runnerScript } = message.params as { processParams: ProcessInitParams, runnerParams: any, runnerScript: string };
     void startProfiling();
+    setTimeOrigin(processParams.timeOrigin);
     const { create } = require(runnerScript);
     processRunner = create(runnerParams) as ProcessRunner;
     processName = processParams.processName;

packages/playwright/src/runner/processHost.ts

@@ -17,7 +17,7 @@
 import child_process from 'child_process';
 import { EventEmitter } from 'events';
 
-import { assert } from 'playwright-core/lib/utils';
+import { assert, timeOrigin } from 'playwright-core/lib/utils';
 import { debug } from 'playwright-core/lib/utilsBundle';
 
 import { esmLoaderRegistered } from '../common/esmLoaderHost';
@@ -115,7 +115,8 @@ export class ProcessHost extends EventEmitter {
       return error;
 
     const processParams: ProcessInitParams = {
-      processName: this._processName
+      processName: this._processName,
+      timeOrigin: timeOrigin(),
     };
 
     this.send({