What is David McNicol’s URL Cache Plugin?

The description to David McNicol’s URL Cache Plugin raises more questions than it answers:
Given a URL, the url_cache() function will attempt to download the file it represents and return a URL pointing to this locally cached version.
Where did he plan to use it? Does he envision the cache as an archive, or for performance? Why hasn’t [...]

Changes To WordPress Object Caching In 2.5

Jacob Santos‘ FuncDoc notes:
The WordPress Object Cache changed in WordPress 2.5 and removed a lot of file support from the code. This means that the Object Cache in WordPress 2.5 is completely dependent on memory and will not be saved to disk for retrieval later. The constant WP_CACHE also changed its meaning.
I’ve just started using [...]

Introducing bsuite_speedcache

I wrote bsuite_speedcache to reduce the number of database queries I was executing per page load. By implementing it on some of the content in my sidebar, I dropped 35 queries for each cache hit. That might not seem like much, but it should average about 525 queries per minute that that my host server [...]