import { AsyncResource } from 'node:async_hooks'
import type { Worker } from 'node:cluster'
import type { MessagePort } from 'node:worker_threads'
+import { type EventLoopUtilization, performance } from 'node:perf_hooks'
+import type { MessageValue, WorkerStatistics } from '../utility-types'
+import { EMPTY_FUNCTION, isPlainObject } from '../utils'
+import {
+ type KillBehavior,
+ KillBehaviors,
+ type WorkerOptions
+} from './worker-options'
import type {
- MessageValue,
TaskFunctions,
WorkerAsyncFunction,
WorkerFunction,
WorkerSyncFunction
-} from '../utility-types'
-import { EMPTY_FUNCTION, isPlainObject } from '../utils'
-import type { KillBehavior, WorkerOptions } from './worker-options'
-import { KillBehaviors } from './worker-options'
+} from './worker-functions'
const DEFAULT_FUNCTION_NAME = 'default'
const DEFAULT_MAX_INACTIVE_TIME = 60000
const DEFAULT_KILL_BEHAVIOR: KillBehavior = KillBehaviors.SOFT
+/**
+ * Task performance.
+ */
+interface TaskPerformance {
+ timestamp: number
+ waitTime?: number
+ runTime?: number
+ elu?: EventLoopUtilization
+}
+
/**
* Base class that implements some shared logic for all poolifier workers.
*
* Timestamp of the last task processed by this worker.
*/
protected lastTaskTimestamp!: number
+ /**
+ * Performance statistics computation.
+ */
+ protected statistics!: WorkerStatistics
/**
* Handler id of the `aliveInterval` worker alive check.
*/
super(type)
this.checkWorkerOptions(this.opts)
this.checkTaskFunctions(taskFunctions)
- if (
- !this.isMain &&
- (this.opts.maxInactiveTime ?? DEFAULT_MAX_INACTIVE_TIME) > 0
- ) {
+ if (!this.isMain) {
this.lastTaskTimestamp = performance.now()
this.aliveInterval = setInterval(
this.checkAlive.bind(this),
)
this.checkAlive.bind(this)()
}
-
this.mainWorker?.on('message', this.messageListener.bind(this))
}
// Kill message received
this.aliveInterval != null && clearInterval(this.aliveInterval)
this.emitDestroy()
+ } else if (message.statistics != null) {
+ // Statistics message received
+ this.statistics = message.statistics
}
}
message: MessageValue<Data>
): void {
try {
- const startTimestamp = performance.now()
- const waitTime = startTimestamp - (message.submissionTimestamp ?? 0)
+ const taskPerformance = this.beginTaskPerformance(message)
const res = fn(message.data)
- const runTime = performance.now() - startTimestamp
+ const { runTime, waitTime, elu } =
+ this.endTaskPerformance(taskPerformance)
this.sendToMainWorker({
data: res,
- id: message.id,
runTime,
- waitTime
+ waitTime,
+ elu,
+ id: message.id
})
} catch (e) {
const err = this.handleError(e as Error)
- this.sendToMainWorker({ error: err, id: message.id })
+ this.sendToMainWorker({
+ error: err,
+ errorData: message.data,
+ id: message.id
+ })
} finally {
!this.isMain && (this.lastTaskTimestamp = performance.now())
}
fn: WorkerAsyncFunction<Data, Response>,
message: MessageValue<Data>
): void {
- const startTimestamp = performance.now()
- const waitTime = startTimestamp - (message.submissionTimestamp ?? 0)
+ const taskPerformance = this.beginTaskPerformance(message)
fn(message.data)
.then(res => {
- const runTime = performance.now() - startTimestamp
+ const { runTime, waitTime, elu } =
+ this.endTaskPerformance(taskPerformance)
this.sendToMainWorker({
data: res,
- id: message.id,
runTime,
- waitTime
+ waitTime,
+ elu,
+ id: message.id
})
return null
})
.catch(e => {
const err = this.handleError(e as Error)
- this.sendToMainWorker({ error: err, id: message.id })
+ this.sendToMainWorker({
+ error: err,
+ errorData: message.data,
+ id: message.id
+ })
})
.finally(() => {
!this.isMain && (this.lastTaskTimestamp = performance.now())
}
return fn
}
+
+ private beginTaskPerformance (message: MessageValue<Data>): TaskPerformance {
+ const timestamp = performance.now()
+ return {
+ timestamp,
+ ...(this.statistics.waitTime && {
+ waitTime: timestamp - (message.timestamp ?? timestamp)
+ }),
+ ...(this.statistics.elu && { elu: performance.eventLoopUtilization() })
+ }
+ }
+
+ private endTaskPerformance (
+ taskPerformance: TaskPerformance
+ ): TaskPerformance {
+ return {
+ ...taskPerformance,
+ ...(this.statistics.runTime && {
+ runTime: performance.now() - taskPerformance.timestamp
+ }),
+ ...(this.statistics.elu && {
+ elu: performance.eventLoopUtilization(taskPerformance.elu)
+ })
+ }
+ }
}