package main

import (
	"fmt"
	"time"
)

func main() {
	const loopCount = 100000 // 10万次拼接
	var result string

	start := time.Now()
	for i := 0; i < loopCount; i++ {
		result += fmt.Sprintf("item_%d,", i) // 每次拼接生成新字符串，内存分配频繁
	}
	fmt.Printf("fmt循环拼接耗时：%v\n", time.Since(start))
	_ = result // 避免未使用变量警告
}