Xiaohongshu Tech REDtech

Oct 9, 2026 · Backend Development

RED OHC Open-Sourced: New Java Off-Heap Cache SOTA, 3.38x Multi-Threaded Throughput

Xiaohongshu open-sources RED OHC, a Java off-heap cache achieving 3.38x throughput over Cassandra OHC in 32-thread reads via lock-free reads, epoch-based reclamation, background actor for eviction and memory return, and cache-line-aligned data structures, with benchmarks showing near-zero heap allocation and GC.