Calculate throughput in MB/s or GB/s instead of MiB/s or GiB/s

[V0ldek]

I'm using Criterion with throughput calculation and it'd be really useful, but unfortunately thus far all data that we have reported was in GB/s, as in one billion bytes. Criterion gives results in GiB/s, so 2^30 bytes. I can't see a way to convert that, so either it's not there or it's not well documented.

A workaround for now is to configure it as elements and get reports of Gelems/s, it'd be nice to maybe change the label? So I could just say that instead of reporting "elems" report "Bs"?

[ambiso]

You can implement your own Measurement and return a custom ValueFormatter and make it format differently.

You can wrap this inside a separate crate like the CyclesPerByte Measurement.

[V0ldek]

I've implemented and then turned @ambiso workaround into a crate, so it can be reused: https://crates.io/crates/criterion-decimal-throughput

[bheisler]

Hello! Thanks for the suggestion, and for the patience.

Yeah, that's a fair point. It will need to be in a breaking-change release, but I'd be open to including a Throughput::BytesDecimal or similar.

[V0ldek]

@bheisler If you want help, I can do a PR with what I've implemented in https://github.com/V0ldek/criterion-decimal-throughput

[bheisler]

A pull request (to the version 0.4 branch) would be welcome, yes!