Android 中Jni与Java运算性能比较

完整demo地址

https://github.com/yangtianrui95/JniPerformance

JniPerformance

Jni performance test

Using dense floating-point calculations to test the performance differences between Jni and pure java,

it is found that the computational performance is similar.

使用密集的浮点数计算来测试Jni和原生java之间的性能差别,发现计算性能两者类似

JniMethod

JNIEXPORT jdouble JNICALL Java_ytr_jniperformance_JniWrapper_calculationTask
(JNIEnv *env, jclass clazz, jint loop_count) {
int i;
double circle = 1;
//Floating point operations are time consuming and loop the largest number of integers.
for (i = 0; i < loop_count; i++) {
circle *= 3.1415962;
}
return circle;
}

Java Method

private static double calculationTask(int loop_count) {
int i;
double circle = 1;
//Floating point operations are time consuming and loop the largest number of integers.
for (i = 0; i < loop_count; i++) {
circle *= 3.1415962;
}
return circle;
}

Screenshot: