TypeAlias token

pkg/model/trace/combine.go:15–15

token is uint64 to reduce hash collision rates. Experimentally, it was observed that fnv32 could approach a collision rate of 1 in 10,000. fnv64 avoids collisions when tested against traces with up to 1M spans (see matching test). A collision results in a dropped span during combine.

// when tested against traces with up to 1M spans (see matching test). A collision
// results in a dropped span during combine.
type token uint64

var ErrTraceTooLarge = fmt.Errorf("trace exceeds max size")