The Evolution of Go Caching Libraries: From Ristretto to Otter v2
2025-07-03
This article explores the evolution of Go caching libraries. Early Go cache libraries suffered from concurrency and performance bottlenecks. Ristretto emerged as a leader, offering high throughput and good hit rates, but its design flaws eventually led to decreased hit rates and suboptimal performance under specific loads. Theine and Otter v1 followed, attempting to address Ristretto's shortcomings, each with its own strengths and weaknesses. Finally, the author developed Otter v2, which incorporates lessons learned from its predecessors and borrows from Java's Caffeine library to achieve high throughput, high hit rates, and rich features, making it a top contender among Go caching libraries.
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