Commit | Line | Data |
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fc3e6586 | 1 | import { AsyncResource } from 'node:async_hooks' |
6677a3d3 | 2 | import type { Worker } from 'node:cluster' |
fc3e6586 | 3 | import type { MessagePort } from 'node:worker_threads' |
d715b7bc JB |
4 | import { performance } from 'node:perf_hooks' |
5 | import type { | |
6 | MessageValue, | |
5c4d16da | 7 | Task, |
d715b7bc JB |
8 | TaskPerformance, |
9 | WorkerStatistics | |
10 | } from '../utility-types' | |
ff128cc9 JB |
11 | import { |
12 | DEFAULT_TASK_NAME, | |
13 | EMPTY_FUNCTION, | |
14 | isAsyncFunction, | |
15 | isPlainObject | |
16 | } from '../utils' | |
241f23c2 JB |
17 | import { |
18 | type KillBehavior, | |
19 | KillBehaviors, | |
20 | type WorkerOptions | |
21 | } from './worker-options' | |
b6b32453 JB |
22 | import type { |
23 | TaskFunctions, | |
24 | WorkerAsyncFunction, | |
25 | WorkerFunction, | |
26 | WorkerSyncFunction | |
27 | } from './worker-functions' | |
4c35177b | 28 | |
978aad6f | 29 | const DEFAULT_MAX_INACTIVE_TIME = 60000 |
1a81f8af | 30 | const DEFAULT_KILL_BEHAVIOR: KillBehavior = KillBehaviors.SOFT |
c97c7edb | 31 | |
729c563d | 32 | /** |
ea7a90d3 | 33 | * Base class that implements some shared logic for all poolifier workers. |
729c563d | 34 | * |
38e795c1 | 35 | * @typeParam MainWorker - Type of main worker. |
e102732c JB |
36 | * @typeParam Data - Type of data this worker receives from pool's execution. This can only be structured-cloneable data. |
37 | * @typeParam Response - Type of response the worker sends back to the main worker. This can only be structured-cloneable data. | |
729c563d | 38 | */ |
c97c7edb | 39 | export abstract class AbstractWorker< |
6677a3d3 | 40 | MainWorker extends Worker | MessagePort, |
d3c8a1a8 S |
41 | Data = unknown, |
42 | Response = unknown | |
c97c7edb | 43 | > extends AsyncResource { |
f59e1027 | 44 | /** |
83fa0a36 | 45 | * Worker id. |
f59e1027 JB |
46 | */ |
47 | protected abstract id: number | |
a86b6df1 JB |
48 | /** |
49 | * Task function(s) processed by the worker when the pool's `execution` function is invoked. | |
50 | */ | |
51 | protected taskFunctions!: Map<string, WorkerFunction<Data, Response>> | |
729c563d S |
52 | /** |
53 | * Timestamp of the last task processed by this worker. | |
54 | */ | |
a9d9ea34 | 55 | protected lastTaskTimestamp!: number |
b6b32453 | 56 | /** |
8a970421 | 57 | * Performance statistics computation requirements. |
b6b32453 JB |
58 | */ |
59 | protected statistics!: WorkerStatistics | |
729c563d | 60 | /** |
b0a4db63 | 61 | * Handler id of the `activeInterval` worker activity check. |
729c563d | 62 | */ |
b0a4db63 | 63 | protected activeInterval?: NodeJS.Timeout |
c97c7edb | 64 | /** |
729c563d | 65 | * Constructs a new poolifier worker. |
c97c7edb | 66 | * |
38e795c1 JB |
67 | * @param type - The type of async event. |
68 | * @param isMain - Whether this is the main worker or not. | |
82888165 | 69 | * @param taskFunctions - Task function(s) processed by the worker when the pool's `execution` function is invoked. The first function is the default function. |
38e795c1 JB |
70 | * @param mainWorker - Reference to main worker. |
71 | * @param opts - Options for the worker. | |
c97c7edb S |
72 | */ |
73 | public constructor ( | |
74 | type: string, | |
c2ade475 | 75 | protected readonly isMain: boolean, |
a86b6df1 JB |
76 | taskFunctions: |
77 | | WorkerFunction<Data, Response> | |
78 | | TaskFunctions<Data, Response>, | |
448ad581 | 79 | protected readonly mainWorker: MainWorker, |
d99ba5a8 | 80 | protected readonly opts: WorkerOptions = { |
e088a00c | 81 | /** |
aee46736 | 82 | * The kill behavior option on this worker or its default value. |
e088a00c | 83 | */ |
1a81f8af | 84 | killBehavior: DEFAULT_KILL_BEHAVIOR, |
e088a00c | 85 | /** |
b0a4db63 | 86 | * The maximum time to keep this worker active while idle. |
e088a00c JB |
87 | * The pool automatically checks and terminates this worker when the time expires. |
88 | */ | |
1a81f8af | 89 | maxInactiveTime: DEFAULT_MAX_INACTIVE_TIME |
4c35177b | 90 | } |
c97c7edb S |
91 | ) { |
92 | super(type) | |
e088a00c | 93 | this.checkWorkerOptions(this.opts) |
a86b6df1 | 94 | this.checkTaskFunctions(taskFunctions) |
1f68cede | 95 | if (!this.isMain) { |
3749facb | 96 | this.mainWorker?.on('message', this.messageListener.bind(this)) |
c97c7edb S |
97 | } |
98 | } | |
99 | ||
41aa7dcd JB |
100 | private checkWorkerOptions (opts: WorkerOptions): void { |
101 | this.opts.killBehavior = opts.killBehavior ?? DEFAULT_KILL_BEHAVIOR | |
102 | this.opts.maxInactiveTime = | |
103 | opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME | |
571227f4 | 104 | delete this.opts.async |
41aa7dcd JB |
105 | } |
106 | ||
107 | /** | |
a86b6df1 | 108 | * Checks if the `taskFunctions` parameter is passed to the constructor. |
41aa7dcd | 109 | * |
82888165 | 110 | * @param taskFunctions - The task function(s) parameter that should be checked. |
41aa7dcd | 111 | */ |
a86b6df1 JB |
112 | private checkTaskFunctions ( |
113 | taskFunctions: | |
114 | | WorkerFunction<Data, Response> | |
115 | | TaskFunctions<Data, Response> | |
116 | ): void { | |
ec8fd331 JB |
117 | if (taskFunctions == null) { |
118 | throw new Error('taskFunctions parameter is mandatory') | |
119 | } | |
a86b6df1 | 120 | this.taskFunctions = new Map<string, WorkerFunction<Data, Response>>() |
0d80593b | 121 | if (typeof taskFunctions === 'function') { |
2a69b8c5 JB |
122 | const boundFn = taskFunctions.bind(this) |
123 | this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn) | |
124 | this.taskFunctions.set( | |
125 | typeof taskFunctions.name === 'string' && | |
126 | taskFunctions.name.trim().length > 0 | |
127 | ? taskFunctions.name | |
128 | : 'fn1', | |
129 | boundFn | |
130 | ) | |
0d80593b | 131 | } else if (isPlainObject(taskFunctions)) { |
82888165 | 132 | let firstEntry = true |
a86b6df1 | 133 | for (const [name, fn] of Object.entries(taskFunctions)) { |
42e2b8a6 JB |
134 | if (typeof name !== 'string') { |
135 | throw new TypeError( | |
136 | 'A taskFunctions parameter object key is not a string' | |
137 | ) | |
138 | } | |
a86b6df1 | 139 | if (typeof fn !== 'function') { |
0d80593b | 140 | throw new TypeError( |
a86b6df1 JB |
141 | 'A taskFunctions parameter object value is not a function' |
142 | ) | |
143 | } | |
2a69b8c5 | 144 | const boundFn = fn.bind(this) |
82888165 | 145 | if (firstEntry) { |
2a69b8c5 | 146 | this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn) |
82888165 JB |
147 | firstEntry = false |
148 | } | |
c50b93fb | 149 | this.taskFunctions.set(name, boundFn) |
a86b6df1 | 150 | } |
630f0acf JB |
151 | if (firstEntry) { |
152 | throw new Error('taskFunctions parameter object is empty') | |
153 | } | |
a86b6df1 | 154 | } else { |
f34fdabe JB |
155 | throw new TypeError( |
156 | 'taskFunctions parameter is not a function or a plain object' | |
157 | ) | |
41aa7dcd JB |
158 | } |
159 | } | |
160 | ||
968a2e8c JB |
161 | /** |
162 | * Checks if the worker has a task function with the given name. | |
163 | * | |
164 | * @param name - The name of the task function to check. | |
165 | * @returns Whether the worker has a task function with the given name or not. | |
13a332e6 | 166 | * @throws {@link https://nodejs.org/api/errors.html#class-typeerror} If the `name` parameter is not a string. |
968a2e8c JB |
167 | */ |
168 | public hasTaskFunction (name: string): boolean { | |
169 | if (typeof name !== 'string') { | |
170 | throw new TypeError('name parameter is not a string') | |
171 | } | |
172 | return this.taskFunctions.has(name) | |
173 | } | |
174 | ||
175 | /** | |
176 | * Adds a task function to the worker. | |
177 | * If a task function with the same name already exists, it is replaced. | |
178 | * | |
179 | * @param name - The name of the task function to add. | |
180 | * @param fn - The task function to add. | |
181 | * @returns Whether the task function was added or not. | |
13a332e6 JB |
182 | * @throws {@link https://nodejs.org/api/errors.html#class-typeerror} If the `name` parameter is not a string. |
183 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the `name` parameter is the default task function reserved name. | |
184 | * @throws {@link https://nodejs.org/api/errors.html#class-typeerror} If the `fn` parameter is not a function. | |
968a2e8c JB |
185 | */ |
186 | public addTaskFunction ( | |
187 | name: string, | |
188 | fn: WorkerFunction<Data, Response> | |
189 | ): boolean { | |
190 | if (typeof name !== 'string') { | |
191 | throw new TypeError('name parameter is not a string') | |
192 | } | |
193 | if (name === DEFAULT_TASK_NAME) { | |
194 | throw new Error( | |
195 | 'Cannot add a task function with the default reserved name' | |
196 | ) | |
197 | } | |
198 | if (typeof fn !== 'function') { | |
199 | throw new TypeError('fn parameter is not a function') | |
200 | } | |
2a69b8c5 | 201 | const boundFn = fn.bind(this) |
968a2e8c JB |
202 | try { |
203 | if ( | |
204 | this.taskFunctions.get(name) === | |
205 | this.taskFunctions.get(DEFAULT_TASK_NAME) | |
206 | ) { | |
2a69b8c5 | 207 | this.taskFunctions.set(DEFAULT_TASK_NAME, boundFn) |
968a2e8c | 208 | } |
2a69b8c5 | 209 | this.taskFunctions.set(name, boundFn) |
968a2e8c JB |
210 | return true |
211 | } catch { | |
212 | return false | |
213 | } | |
214 | } | |
215 | ||
216 | /** | |
217 | * Removes a task function from the worker. | |
218 | * | |
219 | * @param name - The name of the task function to remove. | |
220 | * @returns Whether the task function existed and was removed or not. | |
13a332e6 JB |
221 | * @throws {@link https://nodejs.org/api/errors.html#class-typeerror} If the `name` parameter is not a string. |
222 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the `name` parameter is the default task function reserved name. | |
223 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the `name` parameter is the task function used as default task function. | |
968a2e8c JB |
224 | */ |
225 | public removeTaskFunction (name: string): boolean { | |
226 | if (typeof name !== 'string') { | |
227 | throw new TypeError('name parameter is not a string') | |
228 | } | |
229 | if (name === DEFAULT_TASK_NAME) { | |
230 | throw new Error( | |
231 | 'Cannot remove the task function with the default reserved name' | |
232 | ) | |
233 | } | |
234 | if ( | |
235 | this.taskFunctions.get(name) === this.taskFunctions.get(DEFAULT_TASK_NAME) | |
236 | ) { | |
237 | throw new Error( | |
238 | 'Cannot remove the task function used as the default task function' | |
239 | ) | |
240 | } | |
241 | return this.taskFunctions.delete(name) | |
242 | } | |
243 | ||
244 | /** | |
c50b93fb JB |
245 | * Lists the names of the worker's task functions. |
246 | * | |
247 | * @returns The names of the worker's task functions. | |
248 | */ | |
249 | public listTaskFunctions (): string[] { | |
250 | return Array.from(this.taskFunctions.keys()) | |
251 | } | |
252 | ||
253 | /** | |
254 | * Sets the default task function to use in the worker. | |
968a2e8c JB |
255 | * |
256 | * @param name - The name of the task function to use as default task function. | |
257 | * @returns Whether the default task function was set or not. | |
13a332e6 JB |
258 | * @throws {@link https://nodejs.org/api/errors.html#class-typeerror} If the `name` parameter is not a string. |
259 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the `name` parameter is the default task function reserved name. | |
260 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the `name` parameter is a non-existing task function. | |
968a2e8c JB |
261 | */ |
262 | public setDefaultTaskFunction (name: string): boolean { | |
263 | if (typeof name !== 'string') { | |
264 | throw new TypeError('name parameter is not a string') | |
265 | } | |
266 | if (name === DEFAULT_TASK_NAME) { | |
267 | throw new Error( | |
268 | 'Cannot set the default task function reserved name as the default task function' | |
269 | ) | |
270 | } | |
271 | if (!this.taskFunctions.has(name)) { | |
272 | throw new Error( | |
273 | 'Cannot set the default task function to a non-existing task function' | |
274 | ) | |
275 | } | |
276 | try { | |
277 | this.taskFunctions.set( | |
278 | DEFAULT_TASK_NAME, | |
2a69b8c5 | 279 | this.taskFunctions.get(name) as WorkerFunction<Data, Response> |
968a2e8c JB |
280 | ) |
281 | return true | |
282 | } catch { | |
283 | return false | |
284 | } | |
285 | } | |
286 | ||
aee46736 JB |
287 | /** |
288 | * Worker message listener. | |
289 | * | |
6b813701 | 290 | * @param message - The received message. |
aee46736 | 291 | */ |
6677a3d3 | 292 | protected messageListener (message: MessageValue<Data, Data>): void { |
826f42ee JB |
293 | if (message.workerId === this.id) { |
294 | if (message.ready != null) { | |
295 | // Startup message received | |
b0a4db63 | 296 | this.sendReadyResponse() |
826f42ee JB |
297 | } else if (message.statistics != null) { |
298 | // Statistics message received | |
299 | this.statistics = message.statistics | |
b0a4db63 JB |
300 | } else if (message.checkActive != null) { |
301 | // Check active message received | |
302 | message.checkActive ? this.startCheckActive() : this.stopCheckActive() | |
826f42ee JB |
303 | } else if (message.id != null && message.data != null) { |
304 | // Task message received | |
5c4d16da | 305 | this.run(message) |
826f42ee JB |
306 | } else if (message.kill === true) { |
307 | // Kill message received | |
b0a4db63 | 308 | this.stopCheckActive() |
826f42ee | 309 | this.emitDestroy() |
cf597bc5 | 310 | } |
cf597bc5 JB |
311 | } |
312 | } | |
313 | ||
2431bdb4 | 314 | /** |
289cf7e3 | 315 | * Sends the ready response to the main worker. |
2431bdb4 | 316 | */ |
b0a4db63 | 317 | protected sendReadyResponse (): void { |
2431bdb4 JB |
318 | !this.isMain && this.sendToMainWorker({ ready: true, workerId: this.id }) |
319 | } | |
320 | ||
48487131 | 321 | /** |
b0a4db63 | 322 | * Starts the worker check active interval. |
48487131 | 323 | */ |
b0a4db63 | 324 | private startCheckActive (): void { |
75d3401a | 325 | this.lastTaskTimestamp = performance.now() |
b0a4db63 JB |
326 | this.activeInterval = setInterval( |
327 | this.checkActive.bind(this), | |
75d3401a | 328 | (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) / 2 |
b55c265c | 329 | ).unref() |
75d3401a JB |
330 | } |
331 | ||
48487131 | 332 | /** |
b0a4db63 | 333 | * Stops the worker check active interval. |
48487131 | 334 | */ |
b0a4db63 JB |
335 | private stopCheckActive (): void { |
336 | this.activeInterval != null && clearInterval(this.activeInterval) | |
48487131 JB |
337 | } |
338 | ||
339 | /** | |
340 | * Checks if the worker should be terminated, because its living too long. | |
341 | */ | |
b0a4db63 | 342 | private checkActive (): void { |
48487131 JB |
343 | if ( |
344 | performance.now() - this.lastTaskTimestamp > | |
345 | (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) | |
346 | ) { | |
21f710aa | 347 | this.sendToMainWorker({ kill: this.opts.killBehavior, workerId: this.id }) |
48487131 JB |
348 | } |
349 | } | |
350 | ||
729c563d S |
351 | /** |
352 | * Returns the main worker. | |
838898f1 S |
353 | * |
354 | * @returns Reference to the main worker. | |
729c563d | 355 | */ |
838898f1 | 356 | protected getMainWorker (): MainWorker { |
78cea37e | 357 | if (this.mainWorker == null) { |
e102732c | 358 | throw new Error('Main worker not set') |
838898f1 S |
359 | } |
360 | return this.mainWorker | |
361 | } | |
c97c7edb | 362 | |
729c563d | 363 | /** |
8accb8d5 | 364 | * Sends a message to the main worker. |
729c563d | 365 | * |
38e795c1 | 366 | * @param message - The response message. |
729c563d | 367 | */ |
82f36766 JB |
368 | protected abstract sendToMainWorker ( |
369 | message: MessageValue<Response, Data> | |
370 | ): void | |
c97c7edb | 371 | |
729c563d | 372 | /** |
8accb8d5 | 373 | * Handles an error and convert it to a string so it can be sent back to the main worker. |
729c563d | 374 | * |
38e795c1 | 375 | * @param e - The error raised by the worker. |
ab80dc46 | 376 | * @returns The error message. |
729c563d | 377 | */ |
c97c7edb | 378 | protected handleError (e: Error | string): string { |
985d0e79 | 379 | return e instanceof Error ? e.message : e |
c97c7edb S |
380 | } |
381 | ||
5c4d16da JB |
382 | /** |
383 | * Runs the given task. | |
384 | * | |
385 | * @param task - The task to execute. | |
386 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the task function is not found. | |
387 | */ | |
388 | protected run (task: Task<Data>): void { | |
389 | const fn = this.getTaskFunction(task.name) | |
390 | if (isAsyncFunction(fn)) { | |
391 | this.runInAsyncScope(this.runAsync.bind(this), this, fn, task) | |
392 | } else { | |
393 | this.runInAsyncScope(this.runSync.bind(this), this, fn, task) | |
394 | } | |
395 | } | |
396 | ||
729c563d | 397 | /** |
4dd93fcf | 398 | * Runs the given task function synchronously. |
729c563d | 399 | * |
5c4d16da JB |
400 | * @param fn - Task function that will be executed. |
401 | * @param task - Input data for the task function. | |
729c563d | 402 | */ |
70a4f5ea | 403 | protected runSync ( |
48ef9107 | 404 | fn: WorkerSyncFunction<Data, Response>, |
5c4d16da | 405 | task: Task<Data> |
c97c7edb S |
406 | ): void { |
407 | try { | |
5c4d16da JB |
408 | let taskPerformance = this.beginTaskPerformance(task.name) |
409 | const res = fn(task.data) | |
d715b7bc | 410 | taskPerformance = this.endTaskPerformance(taskPerformance) |
3fafb1b2 JB |
411 | this.sendToMainWorker({ |
412 | data: res, | |
d715b7bc | 413 | taskPerformance, |
f59e1027 | 414 | workerId: this.id, |
5c4d16da | 415 | id: task.id |
3fafb1b2 | 416 | }) |
c97c7edb | 417 | } catch (e) { |
985d0e79 | 418 | const errorMessage = this.handleError(e as Error | string) |
91ee39ed | 419 | this.sendToMainWorker({ |
82f36766 | 420 | taskError: { |
5c4d16da | 421 | name: task.name ?? DEFAULT_TASK_NAME, |
985d0e79 | 422 | message: errorMessage, |
5c4d16da | 423 | data: task.data |
82f36766 | 424 | }, |
21f710aa | 425 | workerId: this.id, |
5c4d16da | 426 | id: task.id |
91ee39ed | 427 | }) |
6e9d10db | 428 | } finally { |
b0a4db63 | 429 | if (!this.isMain && this.activeInterval != null) { |
75d3401a JB |
430 | this.lastTaskTimestamp = performance.now() |
431 | } | |
c97c7edb S |
432 | } |
433 | } | |
434 | ||
729c563d | 435 | /** |
4dd93fcf | 436 | * Runs the given task function asynchronously. |
729c563d | 437 | * |
5c4d16da JB |
438 | * @param fn - Task function that will be executed. |
439 | * @param task - Input data for the task function. | |
729c563d | 440 | */ |
c97c7edb | 441 | protected runAsync ( |
48ef9107 | 442 | fn: WorkerAsyncFunction<Data, Response>, |
5c4d16da | 443 | task: Task<Data> |
c97c7edb | 444 | ): void { |
5c4d16da JB |
445 | let taskPerformance = this.beginTaskPerformance(task.name) |
446 | fn(task.data) | |
c97c7edb | 447 | .then(res => { |
d715b7bc | 448 | taskPerformance = this.endTaskPerformance(taskPerformance) |
3fafb1b2 JB |
449 | this.sendToMainWorker({ |
450 | data: res, | |
d715b7bc | 451 | taskPerformance, |
f59e1027 | 452 | workerId: this.id, |
5c4d16da | 453 | id: task.id |
3fafb1b2 | 454 | }) |
c97c7edb S |
455 | return null |
456 | }) | |
457 | .catch(e => { | |
985d0e79 | 458 | const errorMessage = this.handleError(e as Error | string) |
91ee39ed | 459 | this.sendToMainWorker({ |
82f36766 | 460 | taskError: { |
5c4d16da | 461 | name: task.name ?? DEFAULT_TASK_NAME, |
985d0e79 | 462 | message: errorMessage, |
5c4d16da | 463 | data: task.data |
82f36766 | 464 | }, |
21f710aa | 465 | workerId: this.id, |
5c4d16da | 466 | id: task.id |
91ee39ed | 467 | }) |
6e9d10db JB |
468 | }) |
469 | .finally(() => { | |
b0a4db63 | 470 | if (!this.isMain && this.activeInterval != null) { |
75d3401a JB |
471 | this.lastTaskTimestamp = performance.now() |
472 | } | |
c97c7edb | 473 | }) |
6e9d10db | 474 | .catch(EMPTY_FUNCTION) |
c97c7edb | 475 | } |
ec8fd331 | 476 | |
82888165 | 477 | /** |
5c4d16da | 478 | * Gets the task function with the given name. |
82888165 | 479 | * |
ff128cc9 | 480 | * @param name - Name of the task function that will be returned. |
5c4d16da JB |
481 | * @returns The task function. |
482 | * @throws {@link https://nodejs.org/api/errors.html#class-error} If the task function is not found. | |
82888165 | 483 | */ |
ec8fd331 | 484 | private getTaskFunction (name?: string): WorkerFunction<Data, Response> { |
ff128cc9 | 485 | name = name ?? DEFAULT_TASK_NAME |
ec8fd331 JB |
486 | const fn = this.taskFunctions.get(name) |
487 | if (fn == null) { | |
ace229a1 | 488 | throw new Error(`Task function '${name}' not found`) |
ec8fd331 JB |
489 | } |
490 | return fn | |
491 | } | |
62c15a68 | 492 | |
197b4aa5 | 493 | private beginTaskPerformance (name?: string): TaskPerformance { |
8a970421 | 494 | this.checkStatistics() |
62c15a68 | 495 | return { |
ff128cc9 | 496 | name: name ?? DEFAULT_TASK_NAME, |
1c6fe997 | 497 | timestamp: performance.now(), |
b6b32453 | 498 | ...(this.statistics.elu && { elu: performance.eventLoopUtilization() }) |
62c15a68 JB |
499 | } |
500 | } | |
501 | ||
d9d31201 JB |
502 | private endTaskPerformance ( |
503 | taskPerformance: TaskPerformance | |
504 | ): TaskPerformance { | |
8a970421 | 505 | this.checkStatistics() |
62c15a68 JB |
506 | return { |
507 | ...taskPerformance, | |
b6b32453 JB |
508 | ...(this.statistics.runTime && { |
509 | runTime: performance.now() - taskPerformance.timestamp | |
510 | }), | |
511 | ...(this.statistics.elu && { | |
62c15a68 | 512 | elu: performance.eventLoopUtilization(taskPerformance.elu) |
b6b32453 | 513 | }) |
62c15a68 JB |
514 | } |
515 | } | |
8a970421 JB |
516 | |
517 | private checkStatistics (): void { | |
518 | if (this.statistics == null) { | |
519 | throw new Error('Performance statistics computation requirements not set') | |
520 | } | |
521 | } | |
c97c7edb | 522 | } |