CPUPercent is Wrong，Percent is OK，but wait one second

[greatdba]

Describe the bug proc, _ := process.NewProcess(int32(pid)) cpuPercent, err := proc.CPUPercent() //get wrong value

proc, _ := process.NewProcess(int32(pid)) cpuPercent, err := proc.Percent(time.Second) //right value, **but wait one second** , same like psutil（python)

### how to get cpuPercent faster ？

To Reproduce

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Expected behavior [A clear and concise description of what you expected to happen.]

Environment (please complete the following information):

• [ ] Windows: [paste the result of ver]
• [x] Linux: [paste contents of /etc/os-release and the result of uname -a]
• [ ] Mac OS: [paste the result of sw_vers and uname -a
• [ ] FreeBSD: [paste the result of freebsd-version -k -r -u and uname -a]
• [ ] OpenBSD: [paste the result of uname -a]

Additional context [Cross-compiling? Paste the command you are using to cross-compile and the result of the corresponding go env]

[shirou]

Could you tell us what is the 'wrong value' with some examples?

[qingfengshuixu11]

I have same problem cpuPercent, err := proc.CPUPercent(), cpuPercentis wrong.