Nops

[mrjbq7]

Adding a simple nops benchmark.

[Cloudef]

Maybe this could run the nops for a while and then print averaged nops per s result so it can be run in a benchmark set. Also might want to rename this to coro_nops, I feel like testing nops without coro (aio only) could also be useful.

Also to make the bench buildable, add it to https://github.com/Cloudef/zig-aio/blob/master/build.zig#L156

[mrjbq7]

Okay, see what you think.

I chose 2.5 million nops total because that takes a little while on macos, but is still kinda fast on linux.

[Cloudef]

Thanks