nbsp;I have just released FSet v2.1.0 (also on GitHub).This release is mostly to add some performance and functionality improvements for seqs. Briefly: Access to and updating of elements at the beginning or end of a long seq is now faster.I have finally gotten around to implementing search and...

   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 like...

   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 package structure, 12 subdirectories for each...

   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 algorithm. For example...

   Table of Contents Building ECL Building WECL Building user programs Extending ASDF Funding Using Common Lisp in WASM enabled runtimes is a new frontier for the Common Lisp ecosystem. In the previous post Using Common Lisp from inside the Browser I’ve discussed how to embed Common Lisp scripts...

   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...

   It is with great pleasure and satisfaction that I published new videos about Common Lisp data structures on my course. The content is divided into 9 videos, for a total of 90 minutes, plus exercises, and comprehensive lisp snippets for each video so you can practice right away. The total learning...

   I have just released FSet 2 You can get it from common-lisp.net or GitHub. A detailed description can be found via those links, but briefly, it makes the CHAMP implementations the default for sets and maps, and makes some minor changes to the API.I am already working on 2.1,...

   Contents Part 1 (Hello World) Part 2 (Basic Templates) Part 3 (Introduction to middleware and Static File management) Part 4 (Forms) Part 5 (Environmental Variables) Part 6 (Database Connections) Part 7 (Envy Configuation Switching) Part 8 (Mounting Middleware) Part 9 (Authentication System) Part...

   I am just really bored by Lisp Machine romantics at this point: they should go away. I expect they never will. History Symbolics went bankrupt in early 1993. In the way of these things various remnants of the company lingered on for, in this case, decades. But 1983 was when the Lisp Machines died....