CPU Usage Benchmarks

[brooksvb]

I would love to see CPU usage benchmarks for the different frameworks, particularly background CPU usage.

It seems like Electron apps always have egregious background CPU usage and I'd like to know how the others stack up.

[Elanis]

I'm currently working on a way to automate benchmark (because I want to add more but testing manually is a pain), I'll probably improve it to add more metrics by the time. I keep this issue open to keep the idea :)