aaac7fed
 liuqimichale
add
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'use strict'
const CHILDREN = 500
, POINTS_PER_CHILD = 1000000
, FARM_OPTIONS = {
maxConcurrentWorkers : require('os').cpus().length
, maxCallsPerWorker : Infinity
, maxConcurrentCallsPerWorker : 1
}
let workerFarm = require('../../')
, calcDirect = require('./calc')
, calcWorker = workerFarm(FARM_OPTIONS, require.resolve('./calc'))
, ret
, start
, tally = function (finish, err, avg) {
ret.push(avg)
if (ret.length == CHILDREN) {
let pi = ret.reduce(function (a, b) { return a + b }) / ret.length
, end = +new Date()
console.log('π ≈', pi, '\t(' + Math.abs(pi - Math.PI), 'away from actual!)')
console.log('took', end - start, 'milliseconds')
if (finish)
finish()
}
}
, calc = function (method, callback) {
ret = []
start = +new Date()
for (let i = 0; i < CHILDREN; i++)
method(POINTS_PER_CHILD, tally.bind(null, callback))
}
console.log('Doing it the slow (single-process) way...')
calc(calcDirect, function () {
console.log('Doing it the fast (multi-process) way...')
calc(calcWorker, process.exit)
})
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