Scaling and benchmarking a critical message bus using a new indexing strategy

eatonphil 35 points 3 comments October 08, 2026
blog.janestreet.com · View on Hacker News

Discussion Highlights (2 comments)

soltanov

Linear scans break at scale. Partitioning by prefix and using pooled 1024-entry blocks is the right move to prevent 2 GB worst-case index bloat.

rtpg

This is pretty funny to see, because every financial firm interview process I've seen involves some variant of solving a bunch of stuff with min heaps. Never before has a set of engineers been more primed to solve a problem

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