Performance Testing

(preliminary)

Running yarn bench in a package directory will run any existing benchmarks. The results will be printed to stdout and saved in a machine readable format in a local benchmark-<NAME>.json file.

Benchmarks are stored in files named bench-*.js, just like tests are in test-*/js. The benchmark runner finds all files in test/**/bench-*.js (benchmarks share a directory tree with tests because they will often rely on the same set of adjacent support files).