You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: codec_test.go
    path of file: ./repos/easyjson/benchmark
    
    the code of the file until where you have to start completion: // +build use_codec

package benchmark

import (
	"testing"

	"github.com/ugorji/go/codec"
)

func BenchmarkCodec_Unmarshal_M(b *testing.B) {
	var h codec.Handle = new(codec.JsonHandle)
	dec := codec.NewDecoderBytes(nil, h)

	b.SetBytes(int64(len(largeStructText)))
	for i := 0; i < b.N; i++ {
		var s LargeStruct
		dec.ResetBytes(largeStructText)
		if err := dec.Decode(&s); e
    
func BenchmarkCodec_Marshal_S_Parallel_Reuse(b *testing.B) {
	var l int64

	b.RunParallel(func(pb *testing.PB) {
		var out []byte

		var h codec.Handle = new(codec.JsonHandle)
		enc := codec.NewEncoderBytes(&out, h)

		for pb.Next() {
			enc.ResetBytes(&out)
			if err := enc.Encode(&smallStructData); err != nil {
				b.Error(err)
			}
			l = int64(len(out))
			out = out[:0]
		}
	})

	b.SetBytes(l)
}