Awesome
ulid for Scala
Strongly recommend using airframe-ulid instead.
ULID (Universally Unique Lexicographically Sortable Identifier) generator and parser for Scala.
Refer ulid/spec.
Getting Started
libraryDependencies += "net.petitviolet" %% "ulid4s" % "<version>"
Example
scala> import net.petitviolet.ulid4s.ULID
import net.petitviolet.ulid4s.ULID
scala> ULID.generate
res0: String = 01CZX6XV0FQHFK33XA7X4QG4NK
scala> ULID.timeStamp(ULID.generate)
res1: Option[Long] = Some(1546094841642)
scala> System.currentTimeMillis
res2: Long = 1546094852651
Performance
JMH results are below.
$ git checkout v0.3.0 && sbt 'benchmark / jmh:run -i 3 -wi 3 -f 1 -t 1'
HEAD is now at 1770d2c fixed build.sbt
...
[info] Running (fork) org.openjdk.jmh.Main -i 3 -wi 3 -f 1 -t 1
[info] # JMH version: 1.21
[info] # VM version: JDK 1.8.0_192, Java HotSpot(TM) 64-Bit Server VM, 25.192-b12
[info] # VM invoker: /Library/Java/JavaVirtualMachines/jdk1.8.0_192.jdk/Contents/Home/jre/bin/java
[info] # VM options: <none>
...
[info] Benchmark Mode Cnt Score Error Units
[info] ULIDBench.generate_ULID_Random thrpt 3 529616.492 ± 1496958.221 ops/s
[info] ULIDBench.generate_ULID_SecureRandom thrpt 3 63538.492 ± 2606.774 ops/s
[info] ULIDBench.generate_UUID thrpt 3 540198.296 ± 226327.267 ops/s
ULID provides a default ULID generator using SecureRandom, that is slower than UUID v4.
If you do not need strong randomeness on generating ULID, you can use other random generator e.g. Random instead of SecureRandom.