Stars
RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.
Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas
Apache Kafka - A distributed event streaming platform
High Performance Inter-Thread Messaging Library
The official home of the Presto distributed SQL query engine for big data
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
Apache Beam is a unified programming model for Batch and Streaming data processing.
Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.
A scalable, distributed Time Series Database.
Algorithms and Data Structures implemented in Java
A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others
A production-grade java implementation of RAFT consensus algorithm.
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Ultra-fast SQL-like queries on Java collections
Janino is a super-small, super-fast Java™ compiler.
An open source ML system for the end-to-end data science lifecycle
Esper Complex Event Processing, Streaming SQL and Event Series Analysis
Apache ORC - the smallest, fastest columnar storage for Hadoop workloads
A low-level integer compression library in Java
Concurrent Radix and Suffix Trees for Java
A Java version of simdjson, a high-performance JSON parser utilizing SIMD instructions
Benchmarks for queries over continuous data streams.
A fast key/value store that is efficient for high-volume random access reads and writes.