leolee192 · December 22, 2019 15:37
diff --git a/concatCopyPreAllocate.go b/concatCopyPreAllocate.go
 func concatCopyPreAllocate(slices [][]byte) []byte {
    var totalLen int
    for _, s := range slices {
        totalLen += len(s)
    }
    tmp := make([]byte, totalLen)
    var i int
    for _, s := range slices {
        i += copy(tmp[i:], s)
    }
    return tmp
 }
	func concatCopyPreAllocate(slices [][]byte) []byte {
	var totalLen int
	for _, s := range slices {
	totalLen += len(s)
	}
	tmp := make([]byte, totalLen)
	var i int
	for _, s := range slices {
	i += copy(tmp[i:], s)
	}
	return tmp
	}