doom369

@BenchmarkMode(Mode.AverageTime)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Measurement(iterations = 10, time = 1)
public class StartsWith {

    @Param({"http://facebook.com/loginMe", "Http://facebook.com/loginMe", "not url at all"})
    String url;

doom369

JDK 11.0.8, OpenJDK 64-Bit Server VM, 11.0.8+10

Benchmark
EqualsIgnoreCase.equalsAndToLowerCase  HELLO WORLD  avgt   10  37.890 ± 0.547  ns/op
EqualsIgnoreCase.equalsIgnoreCase      HELLO WORLD  avgt   10  42.518 ± 0.451  ns/op

EqualsIgnoreCase.equalsAndToLowerCase  Hello World  avgt   10  33.204 ± 0.525  ns/op
EqualsIgnoreCase.equalsIgnoreCase      Hello World  avgt   10  27.891 ± 0.288  ns/op

EqualsIgnoreCase.equalsAndToLowerCase  hello world  avgt   10  18.047 ± 0.233  ns/op

doom369

Benchmark                         Mode  Cnt   Score   Error  Units
Hashcode.apacheCommons            avgt   10   3.427 ± 0.025  ns/op
Hashcode.defaultHashCode          avgt   10   3.440 ± 0.028  ns/op
Hashcode.guava                    avgt   10   8.631 ± 0.098  ns/op
Hashcode.lombok                   avgt   10   3.502 ± 0.060  ns/op
Hashcode.objectsHashcode          avgt   10   8.722 ± 0.127  ns/op

doom369

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@Measurement(iterations = 10, time = 1)
public class Hashcode {

    UserObjects userObjects;
    UserIDEDefault userIDEDefault;

doom369

    class User {

        String email;

        int age;

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;

doom369

JDK 1.8.0_265, OpenJDK 64-Bit Server VM, 25.265-b01

Benchmark                              (strParams)  Mode  Cnt   Score   Error  Units
EqualsIgnoreCase.equalsAndToLowerCase  HELLO WORLD  avgt   10  67.110 ± 0.891  ns/op
EqualsIgnoreCase.equalsIgnoreCase      HELLO WORLD  avgt   10  46.485 ± 0.671  ns/op

EqualsIgnoreCase.equalsAndToLowerCase  Hello World  avgt   10  57.092 ± 1.146  ns/op
EqualsIgnoreCase.equalsIgnoreCase      Hello World  avgt   10  29.846 ± 0.292  ns/op

EqualsIgnoreCase.equalsAndToLowerCase  hello world  avgt   10  23.289 ± 0.188  ns/op

doom369

@BenchmarkMode(Mode.AverageTime)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Measurement(iterations = 10, time = 1)
public class EqualsIgnoreCase {

    @Param({"HELLO WORLD", "Hello World", "hello world", "otherParam"})
    String strParams;

doom369

    public boolean equals(Object anObject) {
        if (this == anObject) {
            return true;
        }
        if (anObject instanceof String) {
            String aString = (String)anObject;
            if (coder() == aString.coder()) {
                return isLatin1() ? StringLatin1.equals(value, aString.value)
                                  : StringUTF16.equals(value, aString.value);
            }

doom369

Benchmark                           (url)  Mode  Cnt  Score   Error  Units
EqualChar.equalsOptimized               /  avgt   10  3.806 ± 0.075  ns/op
EqualChar.equalsPost                    /  avgt   10  5.706 ± 0.089  ns/op
EqualChar.equalsPre                     /  avgt   10  5.960 ± 0.062  ns/op

EqualChar.equalsOptimized  /my/server/url  avgt   10  3.250 ± 0.204  ns/op
EqualChar.equalsPost       /my/server/url  avgt   10  3.464 ± 0.116  ns/op
EqualChar.equalsPre        /my/server/url  avgt   10  3.786 ± 0.027  ns/op

doom369

@BenchmarkMode(Mode.AverageTime)
@Fork(1)
@State(Scope.Thread)
@Warmup(iterations = 5, time = 1)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Measurement(iterations = 10, time = 1)
public class EqualChar {

   @Param({"/", "/my/server/url"})
   private String url;