regexp_union_optimization

⚡ Optimize Large Alternations with Regexp.union

Regexp.union compiles multiple strings or regexes into a single optimized pattern, preventing exponential blow‑ups in alternations and improving maintainability.

words = %w[apple banana cherry date]
pattern = Regexp.union(words)

p "I like banana pie".scan(pattern)  # => ["banana"]

You can mix subpatterns:

pattern = Regexp.union(/dog/, /cat/, 'mouse')