# Prefer strconv over fmt

When converting primitives to/from strings, `strconv` is faster than
`fmt`.

<table>
<thead><tr><th>Bad</th><th>Good</th></tr></thead>
<tbody>
<tr><td>

```go
for i := 0; i < b.N; i++ {
  s := fmt.Sprint(rand.Int())
}
```

</td><td>

```go
for i := 0; i < b.N; i++ {
  s := strconv.Itoa(rand.Int())
}
```

</td></tr>
<tr><td>

```plain
BenchmarkFmtSprint-4    143 ns/op    2 allocs/op
```

</td><td>

```plain
BenchmarkStrconv-4    64.2 ns/op    1 allocs/op
```

</td></tr>
</tbody></table>