Test to show how slices automatically grow their capacity

slice_cap.go

package main

import "fmt"

func main() {
	int64Slice := make([]int64, 0)

	lastCap := -1

	for i := 0; i < 65536; i++ {
		currentCap := cap(int64Slice)
		if currentCap != lastCap {
			fmt.Printf("[]int64 -- len: %d, cap: %d\n", len(int64Slice), currentCap)
			lastCap = currentCap
		}
		int64Slice = append(int64Slice, 0)
	}

	int16Slice := make([]int16, 0)

	lastCap = -1

	for i := 0; i < 65536; i++ {
		currentCap := cap(int16Slice)
		if currentCap != lastCap {
			fmt.Printf("[]int16 -- len: %d, cap: %d\n", len(int16Slice), currentCap)
			lastCap = currentCap
		}
		int16Slice = append(int16Slice, 0)
	}
}