Earlier quoted context omitted.
> uses half the memory this is false > two orders of magnitude faster incorrect > doesn't let your users DOS you by triggering huge file reads on each request. I understood what you were trying to do on your first reply – "Prolly don't want to read the file on every request though" – no need to repeat yourself. plese remember: 1. it's pseudo code, the optimisation is superfluous 2. it never ran, the optimisation is u…
Optimization is never useless. Even code that doesn't run is best written in a resource-effective manner.
unless the intent of the code is to demonstrate some implementation where the optimisations would be distracting