CAT 019

CAT-019 — Regex.new in loop → constant

Field	Value
Severity	warning
Confidence	high
Auto-fix	✅

Regex.new in loop → constant — Creating a Regex inside a loop recompiles the pattern each time. Extract to a constant.

Bad code

3.times { Regex.new("pattern").match(str) }

Good code

PATTERN = /pattern/
3.times { PATTERN.match(str) }