Fast equalsIgnoreCase(...) for JDK 9 test.

*Fast - tests optimized version
*Jdk9 - tests extracted version from JDK 9
*String - tests java String

Run with maven:

# mvn clean install exec:exec

# JMH 1.12 (released 30 days ago)
# VM version: JDK 9-ea, VM 9-ea+116
# VM invoker: C:\Program Files\Java\jdk-9\bin\java.exe
# VM options: <none>
# Warmup: 20 iterations, 1 s each
# Measurement: 20 iterations, 1 s each
# Timeout: 10 min per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Average time, time/op

Benchmark                                         Mode  Cnt   Score   Error  Units
StringEqualsIgnoreCaseBenchmark.constConstFast    avgt   20  23,673 ▒ 0,071  ns/op
StringEqualsIgnoreCaseBenchmark.constConstJdk9    avgt   20  39,040 ▒ 0,497  ns/op
StringEqualsIgnoreCaseBenchmark.constConstString  avgt   20  18,959 ▒ 0,041  ns/op
StringEqualsIgnoreCaseBenchmark.initNewFast       avgt   20  50,760 ▒ 0,610  ns/op
StringEqualsIgnoreCaseBenchmark.initNewJdk9       avgt   20  51,052 ▒ 0,714  ns/op
StringEqualsIgnoreCaseBenchmark.initNewString     avgt   20  29,925 ▒ 0,297  ns/op
StringEqualsIgnoreCaseBenchmark.newNewFast        avgt   20  69,343 ▒ 0,750  ns/op
StringEqualsIgnoreCaseBenchmark.newNewJdk9        avgt   20  99,967 ▒ 1,285  ns/op
StringEqualsIgnoreCaseBenchmark.newNewString      avgt   20  54,044 ▒ 0,453  ns/op
StringEqualsIgnoreCaseBenchmark.varVarFast        avgt   20  23,174 ▒ 0,054  ns/op
StringEqualsIgnoreCaseBenchmark.varVarJdk9        avgt   20  35,282 ▒ 0,449  ns/op
StringEqualsIgnoreCaseBenchmark.varVarString      avgt   20  19,212 ▒ 0,026  ns/op
------------------------------------------------------------------------
Self test:
String: "string".equalsIgnoreCase("String") == true
FastString: "string".equalsIgnoreCase("String") == true
Jdk9String: "string".equalsIgnoreCase("String") == true