The past few days have been spent on speed optimizations of code. The sort of really hard-core optimizations that I haven’t done in a few years – the ones where you say things like “*five* integer assignments?!” and worry about indirect versus direct references.
It’s certainly been a learning experience. It’s also involved writing something like 2500 lines of code in the past 36 hours, with a similar dose expected for the next 36.
After this, I suspect I will need a nap.
Yonatan Zunger’s Blog 
Before that, I suspect you will need a nap… and food…