Given what I've written before , it willprobably not surprise you that I have a little list of modules thatI think should be in the standard library. The first one of them isa decent parsing or parser generator module.

There are two reasons in combination for this. First off, various sortsof parsing is an important part of the work that a decent number ofprograms do. Full bore language parsers are somewhat uncommon, but (atleast in my work) it's reasonably common to be

Here's a cache behavior I've touched on in passing several times butI feel like covering explicitly now. It's what I've taken to call thecache eviction death spiral, where cache evictions start you down a pathto grinding death.

Cache evictions of useful data have an obvious problem; they slow downthe program when you have to pull the needed data back into cache. Butin a contended cache under pressure from multiple sources, they have asecond effect as well; because your program