High cpu on unoptimized code in process package

[gnud]

Describe the bug
I am going to produce process monitoring app to find which process is increasing the temperature, but I ended up producing high cpu (over 80%), can this be optimized to run in realtime and not produce much cpu?

To Reproduce

	processes, err := process.Processes()
	if err != nil {
		return
	}

	for true {
		time.Sleep(1000 * 5)

		for _, _process := range processes {
			var totalCpu, _ = _process.CPUPercent()
			if totalCpu < 30 {
				continue
			}

			fmt.Printf(
				"%d,%s,%f\n",
				_process.Pid,
				getOne(_process.Name()),
				getOne(_process.CPUPercent()),
			)
		}
	}

Expected behavior
Smooth realtime recording/printing.

Environment (please complete the following information):

• Linux:
  NAME="Ubuntu"
  VERSION="18.04.5 LTS (Bionic Beaver)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 18.04.5 LTS"
  VERSION_ID="18.04"
  HOME_URL="https://www.ubuntu.com/"
  SUPPORT_URL="https://help.ubuntu.com/"
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
  PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
  VERSION_CODENAME=bionic
  UBUNTU_CODENAME=bionic

Linux damjan 5.4.0-42-generic #46~18.04.1-Ubuntu SMP Fri Jul 10 07:21:24 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[Lomanic]

This is a duplicate of #842, #1283 and #1070