一些性能数据
preformance of synchronized and unsynchronized access
Mode | Total time | Per-operation time |
---|---|---|
CAS operation | 6.6 seconds | 13 nanoseconds |
Synchronized method | 11.8 seconds | 23 nanoseconds |
Unsynchronized method | 3.9 seconds | 7.8 nanoseconds |
反射
- field set,非反射时间基准为1
- dalvik :反射120左右;缓存反射10左右
- ART :反射40左右; 缓存反射12左右
- hotshot:反射10倍左右;缓存反射2倍左右