UUID parsing performance

Graal

$java -version
openjdk version "1.8.0_121"
OpenJDK Runtime Environment (build 1.8.0_121-b13)
OpenJDK 64-Bit Graal VM (build 25.71-b01-internal-jvmci-0.30, mixed mode)

Result "com.github.marschall.charsequences.ParseUuidBenchmark.parseJdk":
  2.411 ±(99.9%) 0.014 ops/us [Average]
  (min, avg, max) = (2.124, 2.411, 2.462), stdev = 0.043
  CI (99.9%): [2.396, 2.425] (assumes normal distribution)


# Run complete. Total time: 00:06:43

Benchmark                               Mode  Cnt    Score   Error   Units
ParseUuidBenchmark.parseCharSequences  thrpt  100  263.394 ± 1.341  ops/us
ParseUuidBenchmark.parseJdk            thrpt  100    2.411 ± 0.014  ops/us

OpenJDK 9 Preview

$java -version
java version "9"
Java(TM) SE Runtime Environment (build 9+181)
Java HotSpot(TM) 64-Bit Server VM (build 9+181, mixed mode)

Result "com.github.marschall.charsequences.ParseUuidBenchmark.parseJdk":
  8.728 ±(99.9%) 0.036 ops/us [Average]
  (min, avg, max) = (7.871, 8.728, 8.880), stdev = 0.106
  CI (99.9%): [8.693, 8.764] (assumes normal distribution)


# Run complete. Total time: 00:06:44

Benchmark                               Mode  Cnt   Score   Error   Units
ParseUuidBenchmark.parseCharSequences  thrpt  100  29.910 ± 0.138  ops/us
ParseUuidBenchmark.parseJdk            thrpt  100   8.728 ± 0.036  ops/us

Result "com.github.marschall.charsequences.ParseUuidBenchmark.parseJdk":
  8.728 ±(99.9%) 0.036 ops/us [Average]
  (min, avg, max) = (7.871, 8.728, 8.880), stdev = 0.106
  CI (99.9%): [8.693, 8.764] (assumes normal distribution)


# Run complete. Total time: 00:06:44

Benchmark                               Mode  Cnt   Score   Error   Units
ParseUuidBenchmark.parseCharSequences  thrpt  100  29.910 ± 0.138  ops/us
ParseUuidBenchmark.parseJdk            thrpt  100   8.728 ± 0.036  ops/us

Oracle JDK 8

$java -version
java version "1.8.0_144"
Java(TM) SE Runtime Environment (build 1.8.0_144-b01)
Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

Result "com.github.marschall.charsequences.ParseUuidBenchmark.parseJdk":
  2.917 ±(99.9%) 0.008 ops/us [Average]
  (min, avg, max) = (2.835, 2.917, 2.958), stdev = 0.023
  CI (99.9%): [2.909, 2.925] (assumes normal distribution)


# Run complete. Total time: 00:06:43

Benchmark                               Mode  Cnt   Score   Error   Units
ParseUuidBenchmark.parseCharSequences  thrpt  100  25.927 ± 0.063  ops/us
ParseUuidBenchmark.parseJdk            thrpt  100   2.917 ± 0.008  ops/us

running

# source https://github.com/marschall/charsequences/blob/master/src/main/java/com/github/marschall/charsequences/CharSequences.java#L454
# benchmark https://github.com/marschall/charsequences/blob/master/src/test/java/com/github/marschall/charsequences/ParseUuidBenchmark.java
wget https://search.maven.org/remotecontent?filepath=com/github/marschall/charsequences/0.5.0/charsequences-0.5.0-jar-with-test-dependencies.jar
java -cp charsequences-0.5.0-jar-with-test-dependencies.jar com.github.marschall.charsequences.ParseUuidBenchmark