randid
import "go.withmatt.com/randid"
id := randid.New().String()
randid's goals are simple: a smaller, more compact, faster version of uuid4. I don't care about the actual format of a UUID, I just want some random id.
comparison with uuid4
- randid is full 128 bits, and uuid4 is 122
- randid is base64 encoded, uuid4 is hex with hyphens
- randid string length is 22, and uuid4 is 32
uuid4: 3cf6702a-da2a-4456-8a53-80a235b3cbfd
randid: cKTij4eSRWmIFgydqgi_Ww
benchmarks
goos: linux
goarch: amd64
pkg: go.withmatt.com/randid
cpu: 11th Gen Intel(R) Core(TM) i7-1165G7 @ 2.80GHz
BenchmarkNew
BenchmarkNew-8 1462352 827.4 ns/op 16 B/op 1 allocs/op
BenchmarkUUIDNew
BenchmarkUUIDNew-8 1458153 833.9 ns/op 16 B/op 1 allocs/op
BenchmarkNewString
BenchmarkNewString-8 1418264 842.0 ns/op 16 B/op 1 allocs/op
BenchmarkUUIDNewString
BenchmarkUUIDNewString-8 1370332 872.0 ns/op 64 B/op 2 allocs/op
As we can see, just the New() path in comparison to uuid4 is marginally faster, since we're not throwing away extra random bits.
On the New().String() path, we gain a bit more performance and 1 less memory allocation, as well as a smaller allocation needed.
