Generational ZGC, end to end
A walk through Generational ZGC: coloured pointers, load and store barriers, the generational split landed in JDK 21, and how it hits sub-millisecond pauses on multi-TB heaps.
Java
Order-book data structures: the ADT, the array ladder, and the tradeoffs
How matching engines store and update the limit order book — sorted maps, array+bitmap ladders, hash+list, and the production tradeoffs — with a reference Java implementation.