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// Source of https://www.npmjs.com/package/physical-cpu-count | |
'use strict' | |
const os = require('os') | |
const childProcess = require('child_process') | |
function exec (command) { | |
const output = childProcess.execSync(command, {encoding: 'utf8'}) | |
return output | |
} | |
let amount | |
const platform = os.platform() | |
if (platform === 'linux') { | |
const output = exec('lscpu -p | egrep -v "^#" | sort -u -t, -k 2,4 | wc -l') | |
amount = parseInt(output.trim(), 10) | |
} else if (platform === 'darwin') { | |
const output = exec('sysctl -n hw.physicalcpu_max') | |
amount = parseInt(output.trim(), 10) | |
} else if (platform === 'windows') { | |
const output = exec('WMIC CPU Get NumberOfCores') | |
amount = output.split(os.EOL) | |
.map(function parse (line) { return parseInt(line) }) | |
.filter(function numbers (value) { return !isNaN(value) }) | |
.reduce(function add (sum, number) { return sum + number }, 0) | |
} else { | |
const cores = os.cpus().filter(function (cpu, index) { | |
const hasHyperthreading = cpu.model.includes('Intel') | |
const isOdd = index % 2 === 1 | |
return !hasHyperthreading || isOdd | |
}) | |
amount = cores.length | |
} | |
module.exports = amount |
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