A 40-line fix eliminated a 400x performance gap(questdb.com)

348 points by bluestreak 9 months ago | 75 comments

QuestDB engineering blog post explaining how a 40-line OpenJDK change to getting current thread user CPU time on Linux removed a 400x performance gap.

The mask that compiles to nothing: how HotSpots JIT learned to reason about bits(questdb.com)

67 points by rowbin 3 months ago | 8 comments

How we made WINDOW JOIN parallel and vectorized(questdb.com)

26 points by tosh 4 months ago | 2 comments

Investigating Linux phantom disk reads(questdb.io)

277 points by kamaraju 3 years ago | 47 comments

QNX Self-Hosted Developer Desktop(devblog.qnx.com)

257 points by transpute 10 months ago | 147 comments

Lies, Damn Lies and Database Benchmarks(questdb.com)

49 points by eigenBasis 4 months ago | 18 comments