Java Native Interface Performance

Benchmark			JNI		C Code		Factor
void arg, void ret method	0.909 usec	0.038 usec 	23.92
void arg, int ret method	0.932 usec	0.042 usec	22.19
int arg, int ret method		0.985 usec	0.049 usec	20.10
4x-int arg, int ret method	1.310 usec	0.072 usec	18.19

10-byte C-to-Java array copy	3.0 usec		0.354 usec	8.47
1 Kb C-to-Java array copy	18.0 usec	1.68 usec	10.71
100 Kb C-to-Java array copt	1706.0 usec	432.5 usec	3.94

10-byte Java-to-C array copy	7.0 usec		0.354 usec	19.77
1 Kb Java-to-C array copy	272.0 usec	1.68 usec	161.90
100 Kb Java-to-C array copy 	27274.0 usec	432.5 usec	63.06

300 MHz Pentium II, Linux, Sun JVM 1.1.7 + JIT