Benchmarks
The benchmarks use Java microbenchmark harness to provide an accurate analysis. To be fair when judging the throughput, Guava was configured with a concurrency level of 64. The default, 4, reduces memory usage at a cost of 2-3x performance.
In this benchmark the caches are unbounded, initially empty, and the computation returns a constant value. This benchmark demonstrates the overhead due to locking. Caffeine performs a lock-free prescreening before falling back to an atomic compute if absent call.
In this benchmark 8 threads concurrently read from a cache configured with a maximum size.
In this benchmark 8 threads concurrently write to a cache configured with a maximum size.
In this benchmark 6 threads concurrently read from and 2 threads write to a cache configured with a maximum size.
