30 import org.openjdk.jmh.annotations.Fork;
31 import org.openjdk.jmh.annotations.Measurement;
32 import org.openjdk.jmh.annotations.Mode;
33 import org.openjdk.jmh.annotations.OutputTimeUnit;
34 import org.openjdk.jmh.annotations.Setup;
35 import org.openjdk.jmh.annotations.State;
36 import org.openjdk.jmh.annotations.TearDown;
37 import org.openjdk.jmh.annotations.Warmup;
38
39 import java.lang.invoke.MethodHandles;
40 import java.lang.invoke.VarHandle;
41 import java.util.concurrent.TimeUnit;
42
43 import static java.lang.foreign.ValueLayout.JAVA_INT;
44
45 @BenchmarkMode(Mode.AverageTime)
46 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
47 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
48 @State(org.openjdk.jmh.annotations.Scope.Thread)
49 @OutputTimeUnit(TimeUnit.NANOSECONDS)
50 @Fork(value = 3, jvmArgsAppend = "--enable-preview")
51 public class VarHandleExact {
52
53 static final VarHandle exact;
54 static final VarHandle generic;
55
56 static {
57 generic = MethodHandles.memorySegmentViewVarHandle(JAVA_INT);
58 exact = generic.withInvokeExactBehavior();
59 }
60
61 Arena arena;
62 MemorySegment data;
63
64 @Setup
65 public void setup() {
66 arena = Arena.ofConfined();
67 data = arena.allocate(JAVA_INT);
68 }
69
70 @TearDown
71 public void tearDown() {
72 arena.close();
73 }
74
75 @Benchmark
76 public void exact_exactInvocation() {
77 exact.set(data, (long) 0, 42);
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30 import org.openjdk.jmh.annotations.Fork;
31 import org.openjdk.jmh.annotations.Measurement;
32 import org.openjdk.jmh.annotations.Mode;
33 import org.openjdk.jmh.annotations.OutputTimeUnit;
34 import org.openjdk.jmh.annotations.Setup;
35 import org.openjdk.jmh.annotations.State;
36 import org.openjdk.jmh.annotations.TearDown;
37 import org.openjdk.jmh.annotations.Warmup;
38
39 import java.lang.invoke.MethodHandles;
40 import java.lang.invoke.VarHandle;
41 import java.util.concurrent.TimeUnit;
42
43 import static java.lang.foreign.ValueLayout.JAVA_INT;
44
45 @BenchmarkMode(Mode.AverageTime)
46 @Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
47 @Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
48 @State(org.openjdk.jmh.annotations.Scope.Thread)
49 @OutputTimeUnit(TimeUnit.NANOSECONDS)
50 @Fork(3)
51 public class VarHandleExact {
52
53 static final VarHandle exact;
54 static final VarHandle generic;
55
56 static {
57 generic = JAVA_INT.varHandle();
58 exact = generic.withInvokeExactBehavior();
59 }
60
61 Arena arena;
62 MemorySegment data;
63
64 @Setup
65 public void setup() {
66 arena = Arena.ofConfined();
67 data = arena.allocate(JAVA_INT);
68 }
69
70 @TearDown
71 public void tearDown() {
72 arena.close();
73 }
74
75 @Benchmark
76 public void exact_exactInvocation() {
77 exact.set(data, (long) 0, 42);
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