regex-cache

Memoize the results of calls to the RegExp constructor, avoiding repetitive runtime compilation of the same regex string and options. Version 0.4.4 (last released 2016) is stable but unmaintained; no updates in 8+ years. It caches based on stringified arguments, providing performance improvements when options are few and primitive, but not recommended for modern Node.js as V8's RegExp caching has improved significantly.