profiling

profiling.js

const ENABLE = 'ENABLE'

;(function () {

  if (process.env.PROFILING_HEAPDUMP === ENABLE) {
    // heapdump
    require('heapdump')
  }

  if (process.env.PROFILING_MEMORY_STAT === ENABLE) {
    // usage
    var colors = require('colors')

    function beauty (mem) {
      mem = parseInt(mem / (1024 * 1204), 10)
      if (mem < 50) {
        return colors.blue('' + mem)
      }
      if (mem > 70 && mem <= 100) {
        return colors.yellow('' + mem)
      }
      if (mem > 100 && mem < 200) {
        return ('' + mem).yellowBG.black.bold
      }
      if (mem > 200) {
        return ('' + mem).red.bold
      }
      return colors.green('' + mem)
    }

    setInterval(function () {
      var usage = process.memoryUsage()
      console.log(
        'process %s >> rss: %s mb, heapTotal: %s mb, heapUsed: %s mb', process.pid, beauty(usage.rss), beauty(usage.heapTotal), beauty(usage.heapUsed)
      )
    }, 1000 * 3)
  }

})()