improve Elixir speed a bit

Author: hipertracker

README.md

@@ -16,7 +16,7 @@ The following results are for 123 unique utf-8 Bible text files in 23 languages
 2. Python 3.10.2  = 2.80s
 3. Julia 1.7.1    = 4.522
 4. Crystal 1.3.2  = 5.72s
-5. Elixir 1.13.2  = 8.37s
+5. Elixir 1.13.2  = 7.82s
 6. Ruby 3.1.0     = 8.31s
 
 Golang 1.17    = UNDER REFACTORING, stay tuned

example-elixir/lib/words_extractor.ex

@@ -3,6 +3,8 @@ use Timex
 defmodule WordsExtractor do
   @moduledoc nil
 
+  @pat Regex.compile!("[\W\d]+/u")
+
   def run do
     outdir = "words"
     File.rm_rf!(outdir)
@@ -31,7 +33,6 @@ defmodule WordsExtractor do
 
   def worker({path, i}, outdir, count) do
     %{"code" => code, "lang" => lang} = YamlElixir.read_from_file!(path)
-    pat = Regex.compile!("[\W\d]+/u")
 
     filepath = String.replace(path, ".yml", ".txt")
     %File.Stat{:size => filesize} = File.stat!(filepath)
@@ -40,7 +41,7 @@ defmodule WordsExtractor do
       File.read!(filepath)
       |> String.downcase()
       |> String.trim()
-      |> then(&Regex.split(pat, &1))
+      |> then(&Regex.split(@pat, &1))
       |> MapSet.new()
       |> Enum.join("\n")