Comparing variable swap with XOR and with temporary variable.

swap.go

package main

func Swap(a, b int) int {
	a = a ^ b
	b = b ^ a
	a = a ^ b

	return a
}

func Temp(a, b int) int {
	temp := a
	a = b
	b = temp

	return a
}

swap_test.go

package main

import (
	"testing"
)

func BenchmarkSwap(b *testing.B) {
	for n := 0; n < b.N; n++ {
		Swap(50, 200)
	}
}

func BenchmarkTemp(b *testing.B) {
	for n := 0; n < b.N; n++ {
		Temp(50, 200)
	}
}