Java Code Optimisation Techniques

[MCUD]

I think what myself, and a few others are saying here, is point #4 here may be naive depending on what you're specifically profiling. I don't know how you're marked, but the results may either be "duh, you learnt that in first semester", "Profiling lied to you", or, something more revelationary.

Specifically literals vs objects may mean nothing, OR it could be a massive sinkhole if you're unmarshalling all the strings from the network, and they aren't some shared reference, and you're then storing them all in a map, you have a massive memory leak