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Diffstat (limited to 'node_modules/@types/node/perf_hooks.d.ts')
| -rwxr-xr-x | node_modules/@types/node/perf_hooks.d.ts | 586 |
1 files changed, 586 insertions, 0 deletions
diff --git a/node_modules/@types/node/perf_hooks.d.ts b/node_modules/@types/node/perf_hooks.d.ts new file mode 100755 index 0000000..6d57bb7 --- /dev/null +++ b/node_modules/@types/node/perf_hooks.d.ts @@ -0,0 +1,586 @@ +/** + * This module provides an implementation of a subset of the W3C [Web Performance APIs](https://w3c.github.io/perf-timing-primer/) as well as additional APIs for + * Node.js-specific performance measurements. + * + * Node.js supports the following [Web Performance APIs](https://w3c.github.io/perf-timing-primer/): + * + * * [High Resolution Time](https://www.w3.org/TR/hr-time-2) + * * [Performance Timeline](https://w3c.github.io/performance-timeline/) + * * [User Timing](https://www.w3.org/TR/user-timing/) + * + * ```js + * const { PerformanceObserver, performance } = require('perf_hooks'); + * + * const obs = new PerformanceObserver((items) => { + * console.log(items.getEntries()[0].duration); + * performance.clearMarks(); + * }); + * obs.observe({ type: 'measure' }); + * performance.measure('Start to Now'); + * + * performance.mark('A'); + * doSomeLongRunningProcess(() => { + * performance.measure('A to Now', 'A'); + * + * performance.mark('B'); + * performance.measure('A to B', 'A', 'B'); + * }); + * ``` + * @see [source](https://github.com/nodejs/node/blob/v16.9.0/lib/perf_hooks.js) + */ +declare module 'perf_hooks' { + import { AsyncResource } from 'node:async_hooks'; + type EntryType = 'node' | 'mark' | 'measure' | 'gc' | 'function' | 'http2' | 'http'; + interface NodeGCPerformanceDetail { + /** + * When `performanceEntry.entryType` is equal to 'gc', `the performance.kind` property identifies + * the type of garbage collection operation that occurred. + * See perf_hooks.constants for valid values. + */ + readonly kind?: number | undefined; + /** + * When `performanceEntry.entryType` is equal to 'gc', the `performance.flags` + * property contains additional information about garbage collection operation. + * See perf_hooks.constants for valid values. + */ + readonly flags?: number | undefined; + } + /** + * @since v8.5.0 + */ + class PerformanceEntry { + protected constructor(); + /** + * The total number of milliseconds elapsed for this entry. This value will not + * be meaningful for all Performance Entry types. + * @since v8.5.0 + */ + readonly duration: number; + /** + * The name of the performance entry. + * @since v8.5.0 + */ + readonly name: string; + /** + * The high resolution millisecond timestamp marking the starting time of the + * Performance Entry. + * @since v8.5.0 + */ + readonly startTime: number; + /** + * The type of the performance entry. It may be one of: + * + * * `'node'` (Node.js only) + * * `'mark'` (available on the Web) + * * `'measure'` (available on the Web) + * * `'gc'` (Node.js only) + * * `'function'` (Node.js only) + * * `'http2'` (Node.js only) + * * `'http'` (Node.js only) + * @since v8.5.0 + */ + readonly entryType: EntryType; + /** + * Additional detail specific to the `entryType`. + * @since v16.0.0 + */ + readonly detail?: NodeGCPerformanceDetail | unknown | undefined; // TODO: Narrow this based on entry type. + } + /** + * _This property is an extension by Node.js. It is not available in Web browsers._ + * + * Provides timing details for Node.js itself. The constructor of this class + * is not exposed to users. + * @since v8.5.0 + */ + class PerformanceNodeTiming extends PerformanceEntry { + /** + * The high resolution millisecond timestamp at which the Node.js process + * completed bootstrapping. If bootstrapping has not yet finished, the property + * has the value of -1. + * @since v8.5.0 + */ + readonly bootstrapComplete: number; + /** + * The high resolution millisecond timestamp at which the Node.js environment was + * initialized. + * @since v8.5.0 + */ + readonly environment: number; + /** + * The high resolution millisecond timestamp of the amount of time the event loop + * has been idle within the event loop's event provider (e.g. `epoll_wait`). This + * does not take CPU usage into consideration. If the event loop has not yet + * started (e.g., in the first tick of the main script), the property has the + * value of 0. + * @since v14.10.0, v12.19.0 + */ + readonly idleTime: number; + /** + * The high resolution millisecond timestamp at which the Node.js event loop + * exited. If the event loop has not yet exited, the property has the value of -1\. + * It can only have a value of not -1 in a handler of the `'exit'` event. + * @since v8.5.0 + */ + readonly loopExit: number; + /** + * The high resolution millisecond timestamp at which the Node.js event loop + * started. If the event loop has not yet started (e.g., in the first tick of the + * main script), the property has the value of -1. + * @since v8.5.0 + */ + readonly loopStart: number; + /** + * The high resolution millisecond timestamp at which the V8 platform was + * initialized. + * @since v8.5.0 + */ + readonly v8Start: number; + } + interface EventLoopUtilization { + idle: number; + active: number; + utilization: number; + } + /** + * @param util1 The result of a previous call to eventLoopUtilization() + * @param util2 The result of a previous call to eventLoopUtilization() prior to util1 + */ + type EventLoopUtilityFunction = (util1?: EventLoopUtilization, util2?: EventLoopUtilization) => EventLoopUtilization; + interface MarkOptions { + /** + * Additional optional detail to include with the mark. + */ + detail?: unknown | undefined; + /** + * An optional timestamp to be used as the mark time. + * @default `performance.now()`. + */ + startTime?: number | undefined; + } + interface MeasureOptions { + /** + * Additional optional detail to include with the mark. + */ + detail?: unknown | undefined; + /** + * Duration between start and end times. + */ + duration?: number | undefined; + /** + * Timestamp to be used as the end time, or a string identifying a previously recorded mark. + */ + end?: number | string | undefined; + /** + * Timestamp to be used as the start time, or a string identifying a previously recorded mark. + */ + start?: number | string | undefined; + } + interface TimerifyOptions { + /** + * A histogram object created using + * `perf_hooks.createHistogram()` that will record runtime durations in + * nanoseconds. + */ + histogram?: RecordableHistogram | undefined; + } + interface Performance { + /** + * If name is not provided, removes all PerformanceMark objects from the Performance Timeline. + * If name is provided, removes only the named mark. + * @param name + */ + clearMarks(name?: string): void; + /** + * If name is not provided, removes all PerformanceMeasure objects from the Performance Timeline. + * If name is provided, removes only the named measure. + * @param name + * @since v16.7.0 + */ + clearMeasures(name?: string): void; + /** + * Returns a list of `PerformanceEntry` objects in chronological order with respect to `performanceEntry.startTime`. + * If you are only interested in performance entries of certain types or that have certain names, see + * `performance.getEntriesByType()` and `performance.getEntriesByName()`. + * @since v16.7.0 + */ + getEntries(): PerformanceEntry[]; + /** + * Returns a list of `PerformanceEntry` objects in chronological order with respect to `performanceEntry.startTime` + * whose `performanceEntry.name` is equal to `name`, and optionally, whose `performanceEntry.entryType` is equal to `type`. + * @param name + * @param type + * @since v16.7.0 + */ + getEntriesByName(name: string, type?: EntryType): PerformanceEntry[]; + /** + * Returns a list of `PerformanceEntry` objects in chronological order with respect to `performanceEntry.startTime` + * whose `performanceEntry.entryType` is equal to `type`. + * @param type + * @since v16.7.0 + */ + getEntriesByType(type: EntryType): PerformanceEntry[]; + /** + * Creates a new PerformanceMark entry in the Performance Timeline. + * A PerformanceMark is a subclass of PerformanceEntry whose performanceEntry.entryType is always 'mark', + * and whose performanceEntry.duration is always 0. + * Performance marks are used to mark specific significant moments in the Performance Timeline. + * @param name + */ + mark(name?: string, options?: MarkOptions): void; + /** + * Creates a new PerformanceMeasure entry in the Performance Timeline. + * A PerformanceMeasure is a subclass of PerformanceEntry whose performanceEntry.entryType is always 'measure', + * and whose performanceEntry.duration measures the number of milliseconds elapsed since startMark and endMark. + * + * The startMark argument may identify any existing PerformanceMark in the the Performance Timeline, or may identify + * any of the timestamp properties provided by the PerformanceNodeTiming class. If the named startMark does not exist, + * then startMark is set to timeOrigin by default. + * + * The endMark argument must identify any existing PerformanceMark in the the Performance Timeline or any of the timestamp + * properties provided by the PerformanceNodeTiming class. If the named endMark does not exist, an error will be thrown. + * @param name + * @param startMark + * @param endMark + */ + measure(name: string, startMark?: string, endMark?: string): void; + measure(name: string, options: MeasureOptions): void; + /** + * An instance of the PerformanceNodeTiming class that provides performance metrics for specific Node.js operational milestones. + */ + readonly nodeTiming: PerformanceNodeTiming; + /** + * @return the current high resolution millisecond timestamp + */ + now(): number; + /** + * The timeOrigin specifies the high resolution millisecond timestamp from which all performance metric durations are measured. + */ + readonly timeOrigin: number; + /** + * Wraps a function within a new function that measures the running time of the wrapped function. + * A PerformanceObserver must be subscribed to the 'function' event type in order for the timing details to be accessed. + * @param fn + */ + timerify<T extends (...params: any[]) => any>(fn: T, options?: TimerifyOptions): T; + /** + * eventLoopUtilization is similar to CPU utilization except that it is calculated using high precision wall-clock time. + * It represents the percentage of time the event loop has spent outside the event loop's event provider (e.g. epoll_wait). + * No other CPU idle time is taken into consideration. + */ + eventLoopUtilization: EventLoopUtilityFunction; + } + interface PerformanceObserverEntryList { + /** + * Returns a list of `PerformanceEntry` objects in chronological order + * with respect to `performanceEntry.startTime`. + * + * ```js + * const { + * performance, + * PerformanceObserver + * } = require('perf_hooks'); + * + * const obs = new PerformanceObserver((perfObserverList, observer) => { + * console.log(perfObserverList.getEntries()); + * + * * [ + * * PerformanceEntry { + * * name: 'test', + * * entryType: 'mark', + * * startTime: 81.465639, + * * duration: 0 + * * }, + * * PerformanceEntry { + * * name: 'meow', + * * entryType: 'mark', + * * startTime: 81.860064, + * * duration: 0 + * * } + * * ] + * + * observer.disconnect(); + * }); + * obs.observe({ type: 'mark' }); + * + * performance.mark('test'); + * performance.mark('meow'); + * ``` + * @since v8.5.0 + */ + getEntries(): PerformanceEntry[]; + /** + * Returns a list of `PerformanceEntry` objects in chronological order + * with respect to `performanceEntry.startTime` whose `performanceEntry.name` is + * equal to `name`, and optionally, whose `performanceEntry.entryType` is equal to`type`. + * + * ```js + * const { + * performance, + * PerformanceObserver + * } = require('perf_hooks'); + * + * const obs = new PerformanceObserver((perfObserverList, observer) => { + * console.log(perfObserverList.getEntriesByName('meow')); + * + * * [ + * * PerformanceEntry { + * * name: 'meow', + * * entryType: 'mark', + * * startTime: 98.545991, + * * duration: 0 + * * } + * * ] + * + * console.log(perfObserverList.getEntriesByName('nope')); // [] + * + * console.log(perfObserverList.getEntriesByName('test', 'mark')); + * + * * [ + * * PerformanceEntry { + * * name: 'test', + * * entryType: 'mark', + * * startTime: 63.518931, + * * duration: 0 + * * } + * * ] + * + * console.log(perfObserverList.getEntriesByName('test', 'measure')); // [] + * observer.disconnect(); + * }); + * obs.observe({ entryTypes: ['mark', 'measure'] }); + * + * performance.mark('test'); + * performance.mark('meow'); + * ``` + * @since v8.5.0 + */ + getEntriesByName(name: string, type?: EntryType): PerformanceEntry[]; + /** + * Returns a list of `PerformanceEntry` objects in chronological order + * with respect to `performanceEntry.startTime` whose `performanceEntry.entryType`is equal to `type`. + * + * ```js + * const { + * performance, + * PerformanceObserver + * } = require('perf_hooks'); + * + * const obs = new PerformanceObserver((perfObserverList, observer) => { + * console.log(perfObserverList.getEntriesByType('mark')); + * + * * [ + * * PerformanceEntry { + * * name: 'test', + * * entryType: 'mark', + * * startTime: 55.897834, + * * duration: 0 + * * }, + * * PerformanceEntry { + * * name: 'meow', + * * entryType: 'mark', + * * startTime: 56.350146, + * * duration: 0 + * * } + * * ] + * + * observer.disconnect(); + * }); + * obs.observe({ type: 'mark' }); + * + * performance.mark('test'); + * performance.mark('meow'); + * ``` + * @since v8.5.0 + */ + getEntriesByType(type: EntryType): PerformanceEntry[]; + } + type PerformanceObserverCallback = (list: PerformanceObserverEntryList, observer: PerformanceObserver) => void; + class PerformanceObserver extends AsyncResource { + constructor(callback: PerformanceObserverCallback); + /** + * Disconnects the `PerformanceObserver` instance from all notifications. + * @since v8.5.0 + */ + disconnect(): void; + /** + * Subscribes the `PerformanceObserver` instance to notifications of new `PerformanceEntry` instances identified either by `options.entryTypes`or `options.type`: + * + * ```js + * const { + * performance, + * PerformanceObserver + * } = require('perf_hooks'); + * + * const obs = new PerformanceObserver((list, observer) => { + * // Called three times synchronously. `list` contains one item. + * }); + * obs.observe({ type: 'mark' }); + * + * for (let n = 0; n < 3; n++) + * performance.mark(`test${n}`); + * ``` + * @since v8.5.0 + */ + observe( + options: + | { + entryTypes: ReadonlyArray<EntryType>; + buffered?: boolean | undefined; + } + | { + type: EntryType; + buffered?: boolean | undefined; + } + ): void; + } + namespace constants { + const NODE_PERFORMANCE_GC_MAJOR: number; + const NODE_PERFORMANCE_GC_MINOR: number; + const NODE_PERFORMANCE_GC_INCREMENTAL: number; + const NODE_PERFORMANCE_GC_WEAKCB: number; + const NODE_PERFORMANCE_GC_FLAGS_NO: number; + const NODE_PERFORMANCE_GC_FLAGS_CONSTRUCT_RETAINED: number; + const NODE_PERFORMANCE_GC_FLAGS_FORCED: number; + const NODE_PERFORMANCE_GC_FLAGS_SYNCHRONOUS_PHANTOM_PROCESSING: number; + const NODE_PERFORMANCE_GC_FLAGS_ALL_AVAILABLE_GARBAGE: number; + const NODE_PERFORMANCE_GC_FLAGS_ALL_EXTERNAL_MEMORY: number; + const NODE_PERFORMANCE_GC_FLAGS_SCHEDULE_IDLE: number; + } + const performance: Performance; + interface EventLoopMonitorOptions { + /** + * The sampling rate in milliseconds. + * Must be greater than zero. + * @default 10 + */ + resolution?: number | undefined; + } + interface Histogram { + /** + * Returns a `Map` object detailing the accumulated percentile distribution. + * @since v11.10.0 + */ + readonly percentiles: Map<number, number>; + /** + * The number of times the event loop delay exceeded the maximum 1 hour event + * loop delay threshold. + * @since v11.10.0 + */ + readonly exceeds: number; + /** + * The minimum recorded event loop delay. + * @since v11.10.0 + */ + readonly min: number; + /** + * The maximum recorded event loop delay. + * @since v11.10.0 + */ + readonly max: number; + /** + * The mean of the recorded event loop delays. + * @since v11.10.0 + */ + readonly mean: number; + /** + * The standard deviation of the recorded event loop delays. + * @since v11.10.0 + */ + readonly stddev: number; + /** + * Resets the collected histogram data. + * @since v11.10.0 + */ + reset(): void; + /** + * Returns the value at the given percentile. + * @since v11.10.0 + * @param percentile A percentile value in the range (0, 100]. + */ + percentile(percentile: number): number; + } + interface IntervalHistogram extends Histogram { + /** + * Enables the update interval timer. Returns `true` if the timer was + * started, `false` if it was already started. + * @since v11.10.0 + */ + enable(): boolean; + /** + * Disables the update interval timer. Returns `true` if the timer was + * stopped, `false` if it was already stopped. + * @since v11.10.0 + */ + disable(): boolean; + } + interface RecordableHistogram extends Histogram { + /** + * @since v15.9.0 + * @param val The amount to record in the histogram. + */ + record(val: number | bigint): void; + /** + * Calculates the amount of time (in nanoseconds) that has passed since the + * previous call to `recordDelta()` and records that amount in the histogram. + * + * ## Examples + * @since v15.9.0 + */ + recordDelta(): void; + } + /** + * _This property is an extension by Node.js. It is not available in Web browsers._ + * + * Creates an `IntervalHistogram` object that samples and reports the event loop + * delay over time. The delays will be reported in nanoseconds. + * + * Using a timer to detect approximate event loop delay works because the + * execution of timers is tied specifically to the lifecycle of the libuv + * event loop. That is, a delay in the loop will cause a delay in the execution + * of the timer, and those delays are specifically what this API is intended to + * detect. + * + * ```js + * const { monitorEventLoopDelay } = require('perf_hooks'); + * const h = monitorEventLoopDelay({ resolution: 20 }); + * h.enable(); + * // Do something. + * h.disable(); + * console.log(h.min); + * console.log(h.max); + * console.log(h.mean); + * console.log(h.stddev); + * console.log(h.percentiles); + * console.log(h.percentile(50)); + * console.log(h.percentile(99)); + * ``` + * @since v11.10.0 + */ + function monitorEventLoopDelay(options?: EventLoopMonitorOptions): IntervalHistogram; + interface CreateHistogramOptions { + /** + * The minimum recordable value. Must be an integer value greater than 0. + * @default 1 + */ + min?: number | bigint | undefined; + /** + * The maximum recordable value. Must be an integer value greater than min. + * @default Number.MAX_SAFE_INTEGER + */ + max?: number | bigint | undefined; + /** + * The number of accuracy digits. Must be a number between 1 and 5. + * @default 3 + */ + figures?: number | undefined; + } + /** + * Returns a `RecordableHistogram`. + * @since v15.9.0 + */ + function createHistogram(options?: CreateHistogramOptions): RecordableHistogram; +} +declare module 'node:perf_hooks' { + export * from 'perf_hooks'; +} |