Hi everyone and as always, thanks for your amazing work!

Jokes have been lobbied at me in the spirit of the "breaks my worlfow" XKCD 
[1]  - but, please here me out!

Since the (amazing!) 1.13 [2] elixir semantic recompilation changes I can't 
easily force recompilation on single files.

The best I know how, is adding empty comments to the files. That is fine 
for single tries. However, for those who know me, I like benchmarking. 
Particularly, I'd like to use something like hyperfine [3] to benchmark the 
compilation. I could write scripts to add/remove comments in between but it 
seems clumsy. 

I might be missing a variant to get this done here.If so, I apologize for 
not first going to elixirforum.

As for _why_ do I want to do this: I have 3 implementations of the same 
module. I'd really like to compare the impact of the implementation on 
compilation time (one generates a bunch of functions to pattern match, the 
other one just uses a map, there is one variant which also does a file 
read) to provide general guidance on the impact.

I had hoped that I could do `mix compile --force lib/my_file.ex`, but it 
always compiles everything. Enabling this interface would be my proposal to 
remedy this, but y'all might have better ideas or tell me it's not worth it 
:)

Cheers + thanks,
Tobi

[1] https://xkcd.com/1172/
[2] https://hexdocs.pm/elixir/1.13/changelog.html#semantic-recompilation
[3] https://github.com/sharkdp/hyperfine

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