Dynamic Test Linking

dynamic_test_linking is a configuration that speeds up project compilation (after first compile) by compiling only changed sources in the src/ directory and linking the test bytecode dynamically, hence avoid compilation of the solidify files in the test/ directory.

You can enable this feature by setting the dynamic_test_linking configuration option to true in your foundry.toml file:

[profile.default]
...
dynamic_test_linking = true

OR by passing the --dynamic-test-linking flag to the forge build command:

forge build --dynamic-test-linking

We are looking into enabling this by default in the future.

Benchmarks from the PR show greater than 10x speedup in compilation time for large projects: