benchmarks_desc_loading.rb

# Benchmarking things to explore `brew desc` without a cache.
# See: https://github.com/Homebrew/brew/issues/16237

Benchmark.bm do |x|
  x.report("JSON") do
    Homebrew::API::Formula.all_formulae
  end

  x.report("Ruby") do
    CoreTap.instance.formula_files.map do |file|
      Formulary.factory(file)
    end
  end

  x.report("Cache") do
    CacheStoreDatabase.use(:descriptions) do |db|
      db.empty?
    end
  end
end

# On Old iMac
# -----------
# user     system      total        real
# JSON  0.633890   0.073619   0.707509 (  0.709061)
# Ruby 16.119298   2.291271  18.433785 ( 19.035318)
# Cache  0.005555   0.000541   0.006096 (  0.006521)

The JSON parser was around twice as fast on my new MacBook.