fix: fix worker node event emitter memory leak

[poolifier.git] / src / utils.ts

diff --git a/src/utils.ts b/src/utils.ts
index 86b6edadf5da05a139d872202675e1ebda47f3f1..a0a9e530131cbe78df7401dff80452eef16e8634 100644 (file)
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -7,12 +7,7 @@ import type {
   WorkerChoiceStrategyOptions
 } from './pools/selection-strategies/selection-strategies-types'
 import type { KillBehavior } from './worker/worker-options'
-import {
-  type IWorker,
-  type MeasurementStatistics,
-  type WorkerType,
-  WorkerTypes
-} from './pools/worker'
+import { type IWorker, type WorkerType, WorkerTypes } from './pools/worker'
 
 /**
  * Default task name.
@@ -104,7 +99,7 @@ export const getWorkerId = (worker: IWorker): number | undefined => {
  * @internal
  */
 export const sleep = async (ms: number): Promise<void> => {
-  await new Promise((resolve) => {
+  await new Promise(resolve => {
     setTimeout(resolve, ms)
   })
 }
@@ -224,50 +219,6 @@ export const isAsyncFunction = (
   return typeof fn === 'function' && fn.constructor.name === 'AsyncFunction'
 }
 
-/**
- * Updates the given measurement statistics.
- *
- * @param measurementStatistics - The measurement statistics to update.
- * @param measurementRequirements - The measurement statistics requirements.
- * @param measurementValue - The measurement value.
- * @param numberOfMeasurements - The number of measurements.
- * @internal
- */
-export const updateMeasurementStatistics = (
-  measurementStatistics: MeasurementStatistics,
-  measurementRequirements: MeasurementStatisticsRequirements,
-  measurementValue: number
-): void => {
-  if (measurementRequirements.aggregate) {
-    measurementStatistics.aggregate =
-      (measurementStatistics.aggregate ?? 0) + measurementValue
-    measurementStatistics.minimum = min(
-      measurementValue,
-      measurementStatistics.minimum ?? Infinity
-    )
-    measurementStatistics.maximum = max(
-      measurementValue,
-      measurementStatistics.maximum ?? -Infinity
-    )
-    if (
-      (measurementRequirements.average || measurementRequirements.median) &&
-      measurementValue != null
-    ) {
-      measurementStatistics.history.push(measurementValue)
-      if (measurementRequirements.average) {
-        measurementStatistics.average = average(measurementStatistics.history)
-      } else if (measurementStatistics.average != null) {
-        delete measurementStatistics.average
-      }
-      if (measurementRequirements.median) {
-        measurementStatistics.median = median(measurementStatistics.history)
-      } else if (measurementStatistics.median != null) {
-        delete measurementStatistics.median
-      }
-    }
-  }
-}
-
 /**
  * Generates a cryptographically secure random number in the [0,1[ range
  *
@@ -299,3 +250,27 @@ export const min = (...args: number[]): number =>
  */
 export const max = (...args: number[]): number =>
   args.reduce((maximum, num) => (maximum > num ? maximum : num), -Infinity)
+
+/**
+ * Wraps a function so that it can only be called once.
+ *
+ * @param fn - The function to wrap.
+ * @param context - The context to bind the function to.
+ * @returns The wrapped function.
+ * @internal
+ */
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const once = <T, A extends any[], R>(
+  fn: (...args: A) => R,
+  context: T
+): ((...args: A) => R) => {
+  let result: R
+  return (...args: A) => {
+    if (fn != null) {
+      result = fn.apply<T, A, R>(context, args)
+      ;(fn as unknown as undefined) = (context as unknown as undefined) =
+        undefined
+    }
+    return result
+  }
+}