node:perf_hooks

تتشارك الوحدة خط الأداء الزمني والمُنشئات مع متغيرات ⁦Performance⁩ العامة في الويب:

import { performance } from "node:perf_hooks";

performance.mark("start");
performance.measure("work", "start");
console.log(performance.getEntriesByName("work").length); // 1

تشمل الصادرات ⁦performance⁩ و⁦now⁩ ومساعدات ⁦mark/measure/query/clear⁩ ومُنشئات ⁦Performance⁩ و⁦nodeTiming⁩ و⁦createHistogram⁩ و⁦monitorEventLoopDelay⁩ و⁦eventLoopUtilization⁩ و⁦timerify⁩.

‏⁦performance === globalThis.performance⁩، ولمُنشئات الوحدة الهوية نفسها التي لنظائرها العامة. كما يُدرج ⁦nodeTiming⁩ في ⁦performance.getEntriesByType("node")⁩.

ملاحظات التوافق

‏⁦constants⁩ كائن فارغ.
يُبلغ ⁦nodeTiming⁩ عن مراحل بدء التشغيل بالأجزاء من الألف من الثانية نسبةً إلى بدء العملية؛ وقيم ⁦v8Start⁩ و⁦environment⁩ و⁦loopExit⁩ و⁦idleTime⁩ صفر.

Reference

Status: Partial · Not measured · since 1.1.0

Exports

Export	Kind	Status	Notes
`PerformanceEntry`	class	Full	`name`, `entryType`, `startTime`, `duration`, `detail`, `toJSON()`
`PerformanceMark`	class	Full
`PerformanceMeasure`	class	Full
`PerformanceNodeTiming`	class	Full	`nodeStart`, `v8Start`, `environment`, `bootstrapComplete`, `loopStart`, `loopExit`, `idleTime`
`PerformanceObserverEntryList`	class	Full	`getEntries()`, `getEntriesByName()`, `getEntriesByType()`
`PerformanceObserver`	class	Full	`observe()`, `disconnect()`, `takeRecords()`, `PerformanceObserver.supportedEntryTypes`
`now()`	function	Full	Returns the current high-resolution millisecond timestamp relative to timeOrigin
`mark()`	function	Full	Creates a performance mark with the given name
`measure()`	function	Full	Creates a performance measure between two marks or timestamps
`getEntries()`	function	Full	Returns a list of all performance entries
`getEntriesByName()`	function	Full	Returns performance entries filtered by name
`getEntriesByType()`	function	Full	Returns performance entries filtered by type (“mark” or “measure”)
`clearMarks()`	function	Full	Removes all marks, or only marks with the given name
`clearMeasures()`	function	Full	Removes all measures, or only measures with the given name
`timeOrigin`	property	Full	The high-resolution millisecond timestamp at which the process started
`nodeTiming`	property	Full	Timing information about the Node.js process lifecycle

Not implemented

Performance, PerformanceResourceTiming.