digester

type Digester ¶

type Digester struct {
	// contains filtered or unexported fields
}

Digester creates a null-delimited byte slice from a series of strings. It's an efficient way to create map keys.

This helps because (1) appending to a string allocates and (2) converting a byte slice to a string allocates, but (3) the Go compiler optimizes away byte-to-string conversions in map lookups. Using this type to build up a key and doing map lookups with myMap[string(d.digest())] is fast and zero-allocation.

func New() *Digester

func (d *Digester) Add(s string)

func (d *Digester) Digest() []byte

func (d *Digester) Free()