| 1 | import os from 'node:os' |
| 2 | import type { |
| 3 | MeasurementStatisticsRequirements, |
| 4 | WorkerChoiceStrategyOptions |
| 5 | } from './pools/selection-strategies/selection-strategies-types' |
| 6 | |
| 7 | /** |
| 8 | * An intentional empty function. |
| 9 | */ |
| 10 | export const EMPTY_FUNCTION: () => void = Object.freeze(() => { |
| 11 | /* Intentionally empty */ |
| 12 | }) |
| 13 | |
| 14 | /** |
| 15 | * Default worker choice strategy options. |
| 16 | */ |
| 17 | export const DEFAULT_WORKER_CHOICE_STRATEGY_OPTIONS: WorkerChoiceStrategyOptions = |
| 18 | { |
| 19 | runTime: { median: false }, |
| 20 | waitTime: { median: false }, |
| 21 | elu: { median: false } |
| 22 | } |
| 23 | |
| 24 | /** |
| 25 | * Default measurement statistics requirements. |
| 26 | */ |
| 27 | export const DEFAULT_MEASUREMENT_STATISTICS_REQUIREMENTS: MeasurementStatisticsRequirements = |
| 28 | { |
| 29 | aggregate: false, |
| 30 | average: false, |
| 31 | median: false |
| 32 | } |
| 33 | |
| 34 | /** |
| 35 | * Safe helper to get the host OS optimized maximum pool size. |
| 36 | */ |
| 37 | export const availableParallelism = (): number => { |
| 38 | let availableParallelism = 1 |
| 39 | try { |
| 40 | availableParallelism = os.availableParallelism() |
| 41 | } catch { |
| 42 | const cpus = os.cpus() |
| 43 | if (Array.isArray(cpus) && cpus.length > 0) { |
| 44 | availableParallelism = cpus.length |
| 45 | } |
| 46 | } |
| 47 | return availableParallelism |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Compute the median of the given data set. |
| 52 | * |
| 53 | * @param dataSet - Data set. |
| 54 | * @returns The median of the given data set. |
| 55 | */ |
| 56 | export const median = (dataSet: number[]): number => { |
| 57 | if (Array.isArray(dataSet) && dataSet.length === 0) { |
| 58 | return 0 |
| 59 | } |
| 60 | if (Array.isArray(dataSet) && dataSet.length === 1) { |
| 61 | return dataSet[0] |
| 62 | } |
| 63 | const sortedDataSet = dataSet.slice().sort((a, b) => a - b) |
| 64 | return ( |
| 65 | (sortedDataSet[(sortedDataSet.length - 1) >> 1] + |
| 66 | sortedDataSet[sortedDataSet.length >> 1]) / |
| 67 | 2 |
| 68 | ) |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Is the given object a plain object? |
| 73 | * |
| 74 | * @param obj - The object to check. |
| 75 | * @returns `true` if the given object is a plain object, `false` otherwise. |
| 76 | */ |
| 77 | export const isPlainObject = (obj: unknown): boolean => |
| 78 | typeof obj === 'object' && |
| 79 | obj !== null && |
| 80 | obj?.constructor === Object && |
| 81 | Object.prototype.toString.call(obj) === '[object Object]' |