-import os from 'node:os'
+import * as os from 'node:os'
import type {
MeasurementStatisticsRequirements,
WorkerChoiceStrategyOptions
} from './pools/selection-strategies/selection-strategies-types'
import type { KillBehavior } from './worker/worker-options'
+import type { MeasurementStatistics } from './pools/worker'
+
+/**
+ * Default task name.
+ */
+export const DEFAULT_TASK_NAME = 'default'
/**
* An intentional empty function.
*/
export const DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS: WorkerChoiceStrategyOptions =
{
+ choiceRetries: 6,
runTime: { median: false },
waitTime: { median: false },
elu: { median: false }
try {
availableParallelism = os.availableParallelism()
} catch {
- const cpus = os.cpus()
- if (Array.isArray(cpus) && cpus.length > 0) {
- availableParallelism = cpus.length
+ const numberOfCpus = os.cpus()
+ if (Array.isArray(numberOfCpus) && numberOfCpus.length > 0) {
+ availableParallelism = numberOfCpus.length
}
}
return availableParallelism
}
+// /**
+// * Computes the retry delay in milliseconds using an exponential back off algorithm.
+// *
+// * @param retryNumber - The number of retries that have already been attempted
+// * @param maxDelayRatio - The maximum ratio of the delay that can be randomized
+// * @returns Delay in milliseconds
+// */
+// export const exponentialDelay = (
+// retryNumber = 0,
+// maxDelayRatio = 0.2
+// ): number => {
+// const delay = Math.pow(2, retryNumber) * 100
+// const randomSum = delay * maxDelayRatio * Math.random() // 0-(maxDelayRatio*100)% of the delay
+// return delay + randomSum
+// }
+
/**
* Computes the median of the given data set.
*
): fn is (...args: unknown[]) => Promise<unknown> => {
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.
+ */
+export const updateMeasurementStatistics = (
+ measurementStatistics: MeasurementStatistics,
+ measurementRequirements: MeasurementStatisticsRequirements,
+ measurementValue: number,
+ numberOfMeasurements: number
+): void => {
+ if (measurementRequirements.aggregate) {
+ measurementStatistics.aggregate =
+ (measurementStatistics.aggregate ?? 0) + measurementValue
+ measurementStatistics.minimum = Math.min(
+ measurementValue,
+ measurementStatistics.minimum ?? Infinity
+ )
+ measurementStatistics.maximum = Math.max(
+ measurementValue,
+ measurementStatistics.maximum ?? -Infinity
+ )
+ if (measurementRequirements.average && numberOfMeasurements !== 0) {
+ measurementStatistics.average =
+ measurementStatistics.aggregate / numberOfMeasurements
+ }
+ if (measurementRequirements.median && measurementValue != null) {
+ measurementStatistics.history.push(measurementValue)
+ measurementStatistics.median = median(measurementStatistics.history)
+ }
+ }
+}
+
+/**
+ * Executes a function once at a time.
+ *
+ * @param fn - The function to execute.
+ * @param context - The context to bind the function to.
+ * @returns The function to execute.
+ */
+export const once = (
+ // eslint-disable-next-line @typescript-eslint/no-explicit-any
+ fn: (...args: any[]) => void,
+ context: unknown
+ // eslint-disable-next-line @typescript-eslint/no-explicit-any
+): ((...args: any[]) => void) => {
+ let called = false
+ // eslint-disable-next-line @typescript-eslint/no-explicit-any
+ return function (...args: any[]): void {
+ if (!called) {
+ called = true
+ fn.apply(context, args)
+ called = false
+ }
+ }
+}