go语言数组内存是怎么扩容的
话不多说，上测试代码和结果
package main
import (
"fmt"
)
func main() {
var orderIds []int
fmt.Println(len(orderIds), cap(orderIds))
fmt.Println("已使用", "\t\t", "容量", "\t\t", "增量")
var lastCap = cap(orderIds)
for i := 0; i < 100000; i++ {
orderIds = append(orderIds, 1)
if cap(orderIds) != lastCap{
fmt.Println(len(orderIds), "\t\t", cap(orderIds), "\t\t", cap(orderIds)-lastCap)
lastCap = cap(orderIds)
}
}
}
输出
0 0
已使用 容量 增量
1 2 2
3 4 2
5 8 4
9 16 8
...