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lib/ex_toolkit/bench.ex
defmodule ExToolkit.Bench do
@moduledoc """
Utility for quick and simple benchmarking functions in Elixir.
"""
@doc """
Benchmarks the execution time of a piece of code. It should be used only in
really simple cases.
## Examples
iex> timeit "Sleep for a while", do: :timer.sleep(1000)
Executed Sleep for a while in 1.00 seconds
"""
defmacro timeit(name, do: yield) do
quote do
humanize = fn
time_us when time_us < 1_000 -> "#{time_us} μs"
time_us when time_us < 1_000_000 -> "#{Float.round(time_us / 1_000, 2)} ms"
time_us -> "#{Float.round(time_us / 1_000_000, 2)} s"
end
{time, value} =
:timer.tc(fn ->
unquote(yield)
end)
IO.puts("Executed #{unquote(name)} in #{humanize.(time)}")
value
end
end
end