Kotlin性能：runCatching、try-catch块、无异常处理耗时比较

 

 

fun main(args: Array<String>) {
    val a = 1.1f
    val b = 2.2f

    val n1 = System.nanoTime()
    val m1 = System.currentTimeMillis()
    runCatching {
        cal(a, b)
    }
    val n2 = System.nanoTime()
    val m2 = System.currentTimeMillis()
    try {
        cal(a, b)
    } catch (e: Exception) {

    }
    val n3 = System.nanoTime()
    val m3 = System.currentTimeMillis()
    cal(a, b) //正常的无异常处理流程耗时。
    val n4 = System.nanoTime()
    val m4 = System.currentTimeMillis()

    println("${n2 - n1}ns/${m2 - m1}ms ${n3 - n2}ns/${m3 - m2}ms ${n4 - n3}ns/${m4 - m3}ms")
}

fun cal(a: Float, b: Float) {
    a / b
}

 

 

1207000ns/1ms 800ns/0ms 100ns/0ms

 

 

 

 

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