sccache lacks basic ratio (percentage) report in `--show-stats`

[brunvonlope]

sccache have a very detailed report of some aspects when using --show-stats but I was shocked to see that no ratio of hit or misses is present.

This little detail makes the whole stats feature a bit useless when the project have thousands of objects, since is very hard to compare big numbers.

I see that this was tried in #614 but abandoned by the contributor. Since I don't know if you have some milestone to this feature, I suggest a bit of love into this area for better feature parity with ccache.

[sylvestre]

I am not sure that I agree with "shocked" and "a bit useless", as these % are easy to compute.

Don't hesitate to propose a PR to implement adding this %

[brunvonlope]

and "a bit useless", as these % are easy to compute.

Just a note, I restricted the meaning of my sentence to "when the project have thousands of objects". The feature is useful for 99% of use cases, more than the ccache report👍

Don't hesitate to propose a PR to implement adding this %

Unfortunately, I can't contribute in the best way possible (coding), but I thought that worth keeping this issue for tracking purposes.