here is the code:
```go
func main() {
for i := 0; i < 10; i++ {
start := time.Now()
time.Now().Format("20060102150405")
end := time.Now()
fmt.Println(end.Sub(start))
}
}
// output:
34.9788ms
0s
0s
0s
0s
0s
0s
0s
0s
0s
```
here are my questions:
1. why Format so slow?
2. why Format() become fast after first called?
could someone help me? thanks a lot.
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