Sounds like a documentation issue, or lack of a staging environment. I've written and maintained countless large Express applications and routing was never even

Sounds like a documentation issue, or lack of a staging environment. I've written and maintained countless large Express applications and routing was never even remotely a bottleneck, thus the simple & flexible linear lookup. I believe we had an issue or two open for quite a while in case anyone wanted to report real use-cases that performed poorly. Possibly worth mentioning, but there's really nothing stopping people from adding dtrace support to Express, it could easily be done with middleware. Switching frameworks seems a little heavy-handed for something that could have been a 20 minute npm module.