zw := gzip.NewWriter(w)
	defer zw.Close()
	_, err := zw.Write(b)
	return err
}

// CheckValid tests whether the profile is valid. Checks include, but are
// not limited to:
//   - len(Profile.Sample[n].value) == len(Profile.value_unit)
//   - Sample.id has a corresponding Profile.Location
func (p *Profile) CheckValid() error {
	// Check that sample values are consistent
	sampleLen := len(p.SampleType)

func (f *File) setWriteDeadline(time.Time) error {
	if err := f.checkValid("SetWriteDeadline"); err != nil {
		return err
	}
	return poll.ErrNoDeadline
}

// checkValid checks whether f is valid for use, but does not prepare
// to actually use it. If f is not ready checkValid returns an appropriate
// error, perhaps incorporating the operation name op.
func (f *File) checkValid(op string) error {
	if f == nil {
		return ErrInvalid

// scan is passed in for use by checkValid to avoid an allocation.
// checkValid returns nil or a SyntaxError.
func checkValid(data []byte, scan *scanner) error {
	scan.reset()
	for _, c := range data {
		scan.bytes++
		if scan.step(scan, c) == scanError {
			return scan.err
		}
	}
	if scan.eof() == scanError {
		return scan.err
	}
	return nil
}

// It returns the number of bytes read and any error encountered.
// At end of file, Read returns 0, io.EOF.
func (f *File) Read(b []byte) (n int, err error) {
	if err := f.checkValid("read"); err != nil {
		return 0, err
	}
	n, e := f.read(b)
	return n, f.wrapErr("read", e)
}

// ReadAt reads len(b) bytes from the File starting at byte offset off.

	_, err := w.Write(serialize(p))
	return err
}

// CheckValid tests whether the profile is valid. Checks include, but are
// not limited to:
//   - len(Profile.Sample[n].value) == len(Profile.value_unit)
//   - Sample.id has a corresponding Profile.Location
func (p *Profile) CheckValid() error {
	// Check that sample values are consistent
	sampleLen := len(p.SampleType)

			if err = p.Write(tempFile); err == nil {
				o.UI.PrintErr("Saved profile in ", tempFile.Name())
			}
		}
		if err != nil {
			o.UI.PrintErr("Could not save profile: ", err)
		}
	}

	if err := p.CheckValid(); err != nil {
		return nil, err
	}

	return p, nil
}

// character U+FFFD.
func Unmarshal(data []byte, v any) error {
	// Check for well-formedness.
	// Avoids filling out half a data structure
	// before discovering a JSON syntax error.
	var d decodeState
	err := checkValid(data, &d.scan)
	if err != nil {
		return err
	}

	d.init(data)
	return d.unmarshal(v)
}

// Unmarshaler is the interface implemented by types

		var w bytes.Buffer
		pprof.Lookup("mutex").WriteTo(&w, 0)
		p, err := profile.Parse(&w)
		if err != nil {
			t.Fatalf("failed to parse profile: %v", err)
		}
		if err := p.CheckValid(); err != nil {
			t.Fatalf("invalid profile: %v", err)
		}
		return p
	}

	measureDelta := func(t *testing.T, fn func()) (metricGrowth, profileGrowth float64, p *profile.Profile) {