c5635b82c9Add a samplePerIteration option to monitorEventLoopDelay that records event loop delay from libuv event loop iterations instead of the timer interval sampler. The default remains interval-based; existing uses of monitorEventLoopDelay() keep behaving the same unless the samplePerIteration option is passed through. Signed-off-by: Pablo Erhard <pablo.erhardhernandez@datadoghq.com> PR-URL: https://github.com/nodejs/node/pull/62935 Reviewed-By: Bryan English <bryan@bryanenglish.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: James M Snell <jasnell@gmail.com>
99 lines
1.9 KiB
JavaScript
99 lines
1.9 KiB
JavaScript
'use strict';
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const {
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ReflectConstruct,
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SafeMap,
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Symbol,
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SymbolDispose,
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} = primordials;
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const {
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codes: {
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ERR_ILLEGAL_CONSTRUCTOR,
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ERR_INVALID_THIS,
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},
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} = require('internal/errors');
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const {
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createELDHistogram,
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} = internalBinding('performance');
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const {
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validateBoolean,
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validateInteger,
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validateObject,
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} = require('internal/validators');
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const {
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Histogram,
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kHandle,
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kMap,
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} = require('internal/histogram');
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const {
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kEmptyObject,
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} = require('internal/util');
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const {
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markTransferMode,
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} = require('internal/worker/js_transferable');
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const kEnabled = Symbol('kEnabled');
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class ELDHistogram extends Histogram {
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constructor() {
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throw new ERR_ILLEGAL_CONSTRUCTOR();
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}
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/**
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* @returns {boolean}
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*/
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enable() {
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if (this[kEnabled] === undefined)
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throw new ERR_INVALID_THIS('ELDHistogram');
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if (this[kEnabled]) return false;
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this[kEnabled] = true;
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this[kHandle].start();
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return true;
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}
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/**
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* @returns {boolean}
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*/
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disable() {
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if (this[kEnabled] === undefined)
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throw new ERR_INVALID_THIS('ELDHistogram');
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if (!this[kEnabled]) return false;
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this[kEnabled] = false;
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this[kHandle].stop();
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return true;
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}
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[SymbolDispose]() {
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this.disable();
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}
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}
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/**
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* @param {{
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* samplePerIteration : boolean,
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* resolution : number
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* }} [options]
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* @returns {ELDHistogram}
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*/
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function monitorEventLoopDelay(options = kEmptyObject) {
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validateObject(options, 'options');
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const { samplePerIteration = false, resolution = 10 } = options;
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validateBoolean(samplePerIteration, 'options.samplePerIteration');
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validateInteger(resolution, 'options.resolution', 1);
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return ReflectConstruct(
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function() {
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markTransferMode(this, true, false);
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this[kEnabled] = false;
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this[kHandle] = createELDHistogram(resolution, samplePerIteration);
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this[kMap] = new SafeMap();
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}, [], ELDHistogram);
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}
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module.exports = monitorEventLoopDelay;
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