QuickFormat

A faster alternative for mix format. Works by running an elixir server in the background and sending data to format to it via TCP. This is faster than just running mix format, because it avoids the cost of starting up BEAM:

$ time echo "[ ]" | mix format -
[]

real	0m0.633s
user	0m0.559s
sys	0m0.260s

$ time echo "[ ]" | target/release/quick_format
[]

real	0m0.010s
user	0m0.002s
sys	0m0.003s

Saving half a second might not matter when reformatting your whole project, but it's significant if you run format on save as part of your normal workflow.

Installation

Requires rust and elixir, recommended versions specified in .tool-versions. Start the server by running:

mix run --no-halt

Build the client with:

cd quick_format.rs
cargo build --release

Your formatter is availabled in quick_format.rs/target/quick_format:

$ echo "[ ]" | quick_format.rs/target/release/quick_format
[]

Limitations

Currently, quick_format does not support the import_deps option in formatter.exs.