lib: add toJSON to PerformanceMeasure

PR-URL: #53603
Refs: #53570
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

Author: theanarkh

lib/internal/perf/usertiming.js

@@ -136,6 +136,16 @@ class PerformanceMeasure extends PerformanceEntry {
 validateInternalField(this,kDetail,'PerformanceMeasure');
 returnthis[kDetail];
 }
+
+toJSON(){
+return{
+name: this.name,
+entryType: this.entryType,
+startTime: this.startTime,
+duration: this.duration,
+detail: this[kDetail],
+};
+}
 }
 ObjectDefineProperties(PerformanceMeasure.prototype,{
 detail: kEnumerableProperty,

test/parallel/test-performance-measure-detail.js

@@ -0,0 +1,20 @@
+'use strict';
+
+constcommon=require('../common');
+constassert=require('assert');
+constutil=require('util');
+const{ performance, PerformanceObserver }=require('perf_hooks');
+
+constperfObserver=newPerformanceObserver(common.mustCall((items)=>{
+constentries=items.getEntries();
+assert.ok(entries.length===1);
+for(constentryofentries){
+assert.ok(util.inspect(entry).includes('this is detail'));
+}
+}));
+
+perfObserver.observe({entryTypes: ['measure']});
+
+performance.measure('sample',{
+detail: 'this is detail',
+});