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test/micro/org/openjdk/bench/java/lang/StringEquals.java

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21  * questions.
22  */
23 package org.openjdk.bench.java.lang;
24 
25 import org.openjdk.jmh.annotations.*;
26 import java.util.concurrent.TimeUnit;
27 
28 /*
29  * This benchmark naively explores String::equals performance
30  */
31 @BenchmarkMode(Mode.AverageTime)
32 @OutputTimeUnit(TimeUnit.NANOSECONDS)
33 @State(Scope.Thread)
34 @Warmup(iterations = 5, time = 1)
35 @Measurement(iterations = 5, time = 1)
36 @Fork(value = 3)
37 public class StringEquals {
38 
39     public String test = new String("0123456789");
40     public String test2 = new String("tgntogjnrognagronagroangroarngorngaorng");

41     public String test3 = new String(test); // equal to test, but not same
42     public String test4 = new String("0123\u01FF");

43     public String test5 = new String(test4); // equal to test4, but not same
44     public String test6 = new String("0123456780");
45     public String test7 = new String("0123\u01FE");
46 
47     @Benchmark
48     public boolean different() {
49         return test.equals(test2);
50     }
51 
52     @Benchmark
53     public boolean equal() {
54         return test.equals(test3);
55     }
56 
57     @Benchmark
58     public boolean almostEqual() {
59         return test.equals(test6);
60     }
61 
62     @Benchmark

21  * questions.
22  */
23 package org.openjdk.bench.java.lang;
24 
25 import org.openjdk.jmh.annotations.*;
26 import java.util.concurrent.TimeUnit;
27 
28 /*
29  * This benchmark naively explores String::equals performance
30  */
31 @BenchmarkMode(Mode.AverageTime)
32 @OutputTimeUnit(TimeUnit.NANOSECONDS)
33 @State(Scope.Thread)
34 @Warmup(iterations = 5, time = 1)
35 @Measurement(iterations = 5, time = 1)
36 @Fork(value = 3)
37 public class StringEquals {
38 
39     public String test = new String("0123456789");
40     public String test2 = new String("tgntogjnrognagronagroangroarngorngaorng");
41     @SuppressWarnings("initialization")
42     public String test3 = new String(test); // equal to test, but not same
43     public String test4 = new String("0123\u01FF");
44     @SuppressWarnings("initialization")
45     public String test5 = new String(test4); // equal to test4, but not same
46     public String test6 = new String("0123456780");
47     public String test7 = new String("0123\u01FE");
48 
49     @Benchmark
50     public boolean different() {
51         return test.equals(test2);
52     }
53 
54     @Benchmark
55     public boolean equal() {
56         return test.equals(test3);
57     }
58 
59     @Benchmark
60     public boolean almostEqual() {
61         return test.equals(test6);
62     }
63 
64     @Benchmark
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