An extensive guide to self hosted many cloud service in your own network, from hardware to software to network configuration. All done by you.

Cache Poinsoning is basically tricky CDN to generate a bad content for the same cache key, by leveraging a vulnerability where the servers and the cache key isn’t consistent. Even though Web Cache Poisoning has been around for years, the increasing complexity in technology stacks constantly introduces unexpected behaviour which can be abused to achieve novel cache poisoning attacks

Netflix’s extensive movie and TV show library isn’t the only aspect that keeps users hooked. Let’s explore the people and practices behind its app performance that makes for a sticky experience.

When we changed DNS and the result doesn’t reflect quickly as we want to or result are different, understanding them will explain those issue

We can validate data in many places? It can happen at the load balancer, the application, the service, the model or the database. As the application responds to incoming requests, different parts of the code are responsible for different kinds of validation. But what belongs where?

Install rollback is hard to do, service take time to spin up, container need time to restart. The fast way is blue-green deployment. But we have idle node and waste capacity. if deployment happens many time per day. It’s harder to manage to know which pool is active right now. In this post, we look at a few better strategy

While the practice of web performance has been around for a while and the ability to study and debug JavaScript (JS) errors has improved over the years, we’ve never really looked at the impact errors have on performance.

Ever see those curve in nice chart that connect box together? They look very smooth and elegant. How do we generate those?

JIT is everywhere nowadays. Look around and almost all dynamic language are focusing on this area. Writing JIT compiler is a lot of fun and a great way to learn stuff. The first thing to do is to write an interpreter.