[French version available here] Are we willingly making our servers vulnerable to denial-of-service? After a reminder about hash algorithms and the reasons for their use, let’s discuss their cost on our infrastructures. I recently realized that these algorithms were much more complex to implement than expected. Beware, don’t jump to…

[edit] This discussion has indirectly resulted in a new serialization mechanism added to PHP 7.4. This post is now obsolete. PHP serialization/unserialization has several drawbacks ^1. On the serialization side, the Serializable interface: breaks references inside serialized data structures; delegates the responsibility of the serialization format to its implementations, to…

In Making Symfony’s Router 77.7x faster - 1/2, we learned how to build a faster URL matcher, using hash-map lookups for static routes, and combined regular expressions for routes with placeholders, while preserving all the advanced features of the Symfony router. However, more work was needed for some real world…

Was it slow? Not at all. In 2014, Nikita Popov published an inspiring blog post entitled Fast request routing using regular expressions. The article explains how one can match HTTP routes at very high performance, by combining them together in bigger regular expressions. Its conclusion rightfully reminds us that routing…