func (p *Profile) encode(b *buffer) {
	for _, x := range p.SampleType {
		encodeMessage(b, 1, x)
	}
	for _, x := range p.Sample {
		encodeMessage(b, 2, x)
	}
	for _, x := range p.Mapping {
		encodeMessage(b, 3, x)
	}
	for _, x := range p.Location {
		encodeMessage(b, 4, x)
	}
	for _, x := range p.Function {
		encodeMessage(b, 5, x)
	}
	encodeStrings(b, 6, p.stringTable)