Why Xmemcached as Memcached Library?

Feature	"whalin" Memcached for Java	Spymemcached	Xmemcached
Based On	Blocking IO	Java NIO	Java NIO
License	GPL 3.0	Apache 2.0	Apache 2.0
Latest Version	3.0.2 (l/u 2013)	2.12.3 (l/u 2017)	2.4.7 (l/u 2021)
Stability	Widely used and stable	Less stable with reports of timeouts	High performance, carefully tuned for top performance
Support for CAS Operations	No	Yes	Yes
Performance	Good performance with blocking IO	Higher access rate but with stability issues	Extremely high performance, especially in high concurrency
Resource Consumption	Higher due to traditional IO model	Lower due to NIO model	Lower, optimized for less resource consumption
Concurrency Handling	Not specified	Single-threaded approach	Multithreaded, optimized for high concurrency
Comment	Deprecated/Legacy	Has connection issues + legacy	Semi-actively developed + Spring integration