GoThe cache was working perfectly. That was the problem.
A 99.2% hit rate hid nine cache stampedes. What singleflight fixed, what it did not, and the two bugs that only exist under concurrency.
Go
Finding Errors in Log Streams
Rank and select turn two expensive log queries into constant-time lookups. What that costs, what it buys, and why the same code can honestly report both 2ns and 13ns.
SIMD-Optimized Bloom Filter in Go: An In-Depth Exploration
A comprehensive exploration of a cache-line optimized Bloom filter implementation in Go with SIMD acceleration and assembly integration.