for sz := 1; sz <= len(buf); sz <<= 1 {
		sz := sz
		data := marshalCorpusFile(buf[:sz])
		b.Run(strconv.Itoa(sz), func(b *testing.B) {
			for i := 0; i < b.N; i++ {
				b.SetBytes(int64(sz))
				unmarshalCorpusFile(data)
			}
		})
	}
}

func TestByteRoundTrip(t *testing.T) {
	for x := 0; x < 256; x++ {
		b1 := byte(x)
		buf := marshalCorpusFile(b1)
		vs, err := unmarshalCorpusFile(buf)
		if err != nil {

	}
	defer func() {
		if err := mem.Close(); err != nil {
			b.Error(err)
		}
	}()

	initialVal := []any{make([]byte, 32)}
	encodedVals := marshalCorpusFile(initialVal...)
	mem.setValue(encodedVals)

	ws.memMu <- mem

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		ws.m = newMutator()
		mem.setValue(encodedVals)
		mem.header().count = 0

	"strings"
	"unicode/utf8"
)

// encVersion1 will be the first line of a file with version 1 encoding.
var encVersion1 = "go test fuzz v1"

// marshalCorpusFile encodes an arbitrary number of arguments into the file format for the
// corpus.
func marshalCorpusFile(vals ...any) []byte {
	if len(vals) == 0 {
		panic("must have at least one value to marshal")
	}
	b := bytes.NewBuffer([]byte(encVersion1 + "\n"))

	case []byte:
		minimizeBytes(v, tryMinimized, shouldStop)
	default:
		panic("impossible")
	}
	return true, retErr
}

func writeToMem(vals []any, mem *sharedMem) {
	b := marshalCorpusFile(vals...)
	mem.setValue(b)
}

// ping does nothing. The coordinator calls this method to ensure the worker
// has called F.Fuzz and can communicate.

	// Make sure all the seed corpus has marshaled data.
	for i := range opts.Seed {
		if opts.Seed[i].Data == nil && opts.Seed[i].Values != nil {
			opts.Seed[i].Data = marshalCorpusFile(opts.Seed[i].Values...)
		}
	}
	c := &coordinator{
		opts:        opts,
		startTime:   time.Now(),
		inputC:      make(chan fuzzInput),
		minimizeC:   make(chan fuzzMinimizeInput),