I was skeptical at first, but the author appears to have tested his efforts with real hardware, which of course is a core tenet of DOD. Also this is not a post about a new invention, but a set of results from tests where the author replaces a hash table with alternatives. It's interesting to look at the different timings, but remember to test your code and not just follow blindly, as you may have overhead somewhere else that makes the slowest in these tests, suddenly the fastest.
Chose a paradigm that allows for the simplest, least complex, most provably correct code.
Here's another example of premature optimisation:
Swap data for energy, and the demand oriented approach to fulfilment changes the function used to determine fitness. With energy, the demand over time was well known, but ignored by thousands of people installing expensive hardware.