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Or, constantp is not enough.
Because I do a lot of things with Štar, and for other reasons, I spend a fair amount of time writing various compile-time optimizers for things which have the semantics of function calls. You can think of iterator optimizers in Štar as being a bit l...
The Advent of Code will begin in a couple of hours. I've prepared a Common
Lisp project to hold the code. You can clone it from
https://github.com/jrm-code-project/Advent2025.git It contains an
.asd file for the system, a package.lisp file to define the...
Advent Of Code 2025 starts in a few hours. Time to practice your Lisp-fu to solve it with the greatest language of all times this year!
Most of the times, puzzles start with a string input we have to parse to a meaningful data structure, after which we can start working on the algorith...
Table of Contents
For a long time I’ve used a little macro to time chunks of code to avoid an endless succession of boilerplate functions to do this. I’ve finally published the wretched thing.
If you’re writing programs where you care about performance, you often want to be able to make programatic comparisons of performance. time doesn’t do thi...
