安利一个高性能集合库

在找现成的 IntArrayList 发现的:

real-logic/agrona: High Performance data structures and utility methods for Java

• Buffers - Thread safe direct and atomic buffers for working with on and off heap memory with memory ordering semantics.
• Lists - Array backed lists of int/long primitives to avoid boxing.
• Maps - Open addressing and linear probing with int/long primitive keys to object reference values.
• Maps - Open addressing and linear probing with int/long primitive keys to int/long values.
• Sets - Open addressing and linear probing for int/long primitives and object references.
• Cache - Set Associative with int/long primitive keys to object reference values.
• Clocks - Clock implementations to abstract system clocks, allow caching, and enable testing.
• Queues - Lock-less implementations for low-latency applications.
• Ring/Broadcast Buffers - implemented off-heap for IPC communication.
• Simple Agent framework for concurrent services.
• Signal handling to support "Ctrl + c" in a server application.
• Scalable Timer Wheel - For scheduling timers at a given deadline with O(1) register and cancel time.
• Code generation from annotated implementations specialised for primitive types.
• Off-heap counters implementation for application telemetry, position tracking, and coordination.
• Implementations of InputStream and OutputStream that can wrap direct buffers.
• DistinctErrorLog - A log of distinct errors to avoid filling disks with existing logging approaches.
• IdGenerator - Concurrent and distributed unique id generator employing a lock-less implementation of the Twitter Snowflake algorithm.

<dependency>
    <groupId>org.agrona</groupId>
    <artifactId>agrona</artifactId>
    <version>1.21.1</version>
</dependency>