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42 lines
1.2 KiB
42 lines
1.2 KiB
4 years ago
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'use strict'
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const CHILDREN = 500
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, POINTS_PER_CHILD = 1000000
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, FARM_OPTIONS = {
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maxConcurrentWorkers : require('os').cpus().length
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, maxCallsPerWorker : Infinity
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, maxConcurrentCallsPerWorker : 1
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}
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let workerFarm = require('../../')
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, calcDirect = require('./calc')
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, calcWorker = workerFarm(FARM_OPTIONS, require.resolve('./calc'))
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, ret
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, start
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, tally = function (finish, err, avg) {
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ret.push(avg)
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if (ret.length == CHILDREN) {
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let pi = ret.reduce(function (a, b) { return a + b }) / ret.length
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, end = +new Date()
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console.log('π ≈', pi, '\t(' + Math.abs(pi - Math.PI), 'away from actual!)')
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console.log('took', end - start, 'milliseconds')
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if (finish)
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finish()
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}
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}
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, calc = function (method, callback) {
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ret = []
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start = +new Date()
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for (let i = 0; i < CHILDREN; i++)
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method(POINTS_PER_CHILD, tally.bind(null, callback))
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}
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console.log('Doing it the slow (single-process) way...')
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calc(calcDirect, function () {
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console.log('Doing it the fast (multi-process) way...')
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calc(calcWorker, process.exit)
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})
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