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QuestDB introduces a dedicated WINDOW JOIN operator that is parallelized and vectorized, achieving up to 25x speedup over alternative databases for time-series aggregations around event timestamps.
The article critiques common database benchmarks, using ClickBench as an example, highlighting how differences in measurement methodology (cold vs hot runs) can unfairly advantage certain systems, and warns against taking benchmark results at face value.
QuestDB engineers debug a sporadic Windows hang caused by a deadlock involving the Windows DLL Loader Lock, Rust thread-local storage destruction, JNI detach, and JVM garbage collection safepoint mechanics.