Link: A deep dive into the Go memory allocator
Allocator Wrestling is a summary of Eben Freeman's talk from GopherCon 2018 on the Go memory allocator (via, and see also) and its garbage collection system. The slides are here (via) and have more details and elaborations on various things than the livebloged summary, although you probably want to read both (good talks are rarely entirely captured by their slides).
I love seeing under the hood of a complex system this way, and it's probably helped me move towards understanding some things about how much memory Go programs use (or appear to use).
Link: Where Vim Came From
Where Vim Came From (via) is an interesting and thorough overview of the history of vim, vi, ed, and other predecessors (with copious footnotes). It's nice to see all of the pieces laid out this way, and I learned of some historical links that I hadn't already known.
(I do wonder what vi would have been like if ed had kept QED's multiple buffer support.)