flow like the river

VISUALIZACION/node_modules/physical-cpu-count/index.js

@@ -0,0 +1,35 @@
+'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