Just published a longform article on parallel collectors in Java Streams.

✅ Covers correctness, performance, pitfalls
🛠 Custom collectors with CONCURRENT semantics
🔬 JMH benchmark

TL;DR: .parallelStream() is not a magic wand.

https://svenruppert.com/2025/04/08/synchronous-in-chaos-how-parallel-collectors-bring-order-to-java-streams/

#Java #StreamsAPI #OpenJDK #Concurrency #FunctionalProgramming

Java - Gatherer: a powerful new way to control Stream aggregation!

Inject, filter, finish early – even in parallel.

No frameworks. Pure Java. Learn how it works

#Java #StreamsAPI #Gatherer #JavaDev #Streams #java24

https://svenruppert.com/2025/04/02/rethinking-java-streams-gatherer-for-more-control-and-parallelism/

Does anyone actually enjoy writing boilerplate code for reading and writing streams? I swear I am on the verge of tears right now. #streamsapi