add benchmarking harness

script/bench.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+set -xeuo pipefail
+
+cargo build --release
+
+mkdir -p bench_config
+trap 'rm -r bench_config' EXIT
+
+./target/release/elm-forbid-import -c bench_config/config.toml add-root vendor/elm-spa-example
+./target/release/elm-forbid-import -c bench_config/config.toml forbid Html --hint "Use Html.Styled"
+./target/release/elm-forbid-import -c bench_config/config.toml forbid Html.Events
+./target/release/elm-forbid-import -c bench_config/config.toml forbid Html.Attributes
+./target/release/elm-forbid-import -c bench_config/config.toml update
+
+hyperfine './target/release/elm-forbid-import -c bench_config/config.toml check'

shell.nix

@@ -16,5 +16,8 @@ stdenv.mkDerivation {
     rustPackages.clippy
     rustPackages.rustfmt
     rustc
+
+    # Benchmarking + Optimization
+    hyperfine
   ];
 }