Top 10 Easy Performance Optimisations in Java

There has been a lot of hype about the buzzword “web scale“, and people are going through lengths of reorganising their application architecture to get their systems to “scale”.
But what is scaling, and how can we make sure that we can scale?

Different aspects of scaling

The hype mentioned above is mostly about scaling load, i.e. to make sure that a system that works for 1 user will also work well for 10 users, or 100 users, or millions. Ideally, your system is as “stateless” as possible such that the few pieces of state that really remain can be transferred and transformed on any processing unit in your network. When load is your problem, latency is probably not, so it’s OK if individual requests take 50-100ms. This is often also referred to as scaling out

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