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René Schwietzke

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titleconferencedate
Conquering a Billion Rows with Modern Java ConcurrencyJCON EUROPE 20262026-04-20
Takes the 1 Billion Row Challenge from a 77s one-thread baseline on cloud hardware and targets 8 cores using only the JDK (no Unsafe, no external libs) and…
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The First 80% of Reading One Billion Rows Fast EnoughJfokus 20252025-02-03
Baseline naive Streams run about six minutes on the supplied 13–14 GB CSV while the contest winner gets down to ~1.2 seconds; this presentation shows the 1BRC…
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Micro Benchmarking - The Art of Realizing One is WrongDevoxx Belgium 20242024-10-07
Uses JMH to show that tiny Java benchmarks lie: system arraycopy vs manual copy flips winners across JDKs and CPUs, measuring clock resolution and seeing…
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