Unique ID generator based on Twitter's snowflake. IDs are 64bits positive integers(highest bit zero), format in detail:
+------------------------+--------------------------+-----------------+
| 43bits timestamp in ms | 8bits worker(machine) ID | 12bits sequence |
+------------------------+--------------------------+-----------------+
go get github.com/fainted/snowflake
import "github.com/fainted/snowflake"
// worker ID: 1
worker, err := snowflake.NewChannelWorker(1)
if err != nil {
return
}
id, err := worker.Next()You can use snowflake.AtomicWorker as well, which is very fast and costs more CPU.
$ go test -v -bench . -run "Gen" -benchmem
BenchmarkAtomicGen-2 5000000 244 ns/op 0 B/op 0 allocs/op
BenchmarkAtomicParallel-2 5000000 244 ns/op 0 B/op 0 allocs/op
BenchmarkChannelGen-2 3000000 475 ns/op 0 B/op 0 allocs/op
BenchmarkChannelParallel-2 3000000 496 ns/op 0 B/op 0 allocs/op