JDK8 और JDK7 में प्रतिबिंब प्रदर्शन की तुलना करें

@BenchmarkMode(Mode.Throughput) @OutputTimeUnit(TimeUnit.SECONDS) @State(Scope.Thread) public class ReflectionFieldAccess { private static final Class<TestedClass> clazz = TestedClass.class; private TestedClass testedObject; Field simpleField; Field fieldAccessible; @Setup public void init() { try { testedObject = new TestedClass(); simpleField = clazz.getField("a"); Field Field = clazz.getField("b"); Field.setAccessible(true); fieldAccessible = Field; } catch (Exception e) { // do nothing } } @GenerateMicroBenchmark public Object testFieldSaveAccessible() throws Exception { return fieldAccessible.get(testedObject); } @GenerateMicroBenchmark public Object testFieldSaveNotAccessible() throws Exception { return simpleField.get(testedObject); } @GenerateMicroBenchmark public Object testFieldStraighforward() throws Exception { return testedObject.c; } } 

 @BenchmarkMode(Mode.Throughput) @OutputTimeUnit(TimeUnit.SECONDS) @State(Scope.Thread) public class ReflectionFieldStaticAccess { private static final Class<TestedClass> clazz = TestedClass.class; Field simpleField; Field fieldAccessible; @Setup public void init() { try { simpleField = clazz.getField("aStat"); Field Field = clazz.getField("bStat"); Field.setAccessible(true); fieldAccessible = Field; } catch (Exception e) { // do nothing } } @GenerateMicroBenchmark public Object testFieldSaveAccessible() throws Exception { return fieldAccessible.get(null); } @GenerateMicroBenchmark public Object testFieldSaveNotAccessible() throws Exception { return simpleField.get(null); } @GenerateMicroBenchmark public Object testFieldStraighforward() throws Exception { return TestedClass.cStat; } } 

 @BenchmarkMode(Mode.Throughput) @OutputTimeUnit(TimeUnit.SECONDS) @State(Scope.Thread) public class ReflectionMethodAccess { private static final Class<TestedClass> clazz = TestedClass.class; private TestedClass testedObject; Method simpleMethod; Method methodAccessible; FastMethod fastMethod; MethodHandle methodHandle; @Setup public void init() { try { testedObject = new TestedClass(); simpleMethod = clazz.getMethod("getA", null); Method method = clazz.getMethod("getB", null); method.setAccessible(true); methodAccessible = method; fastMethod = FastClass.create(clazz).getMethod("getC", null); methodHandle = MethodHandles.lookup().findVirtual(clazz, "getD", MethodType.methodType(Integer.class)); } catch (Exception e) { // do nothing } } @GenerateMicroBenchmark public Object testFastMethod() throws Throwable { return fastMethod.invoke(testedObject, null); } @GenerateMicroBenchmark public Object testMethodAccessible() throws Throwable { return methodAccessible.invoke(testedObject, null); } @GenerateMicroBenchmark public Object testMethodNotAccessible() throws Throwable { return simpleMethod.invoke(testedObject, null); } @GenerateMicroBenchmark public Object testMethodHandleExact() throws Throwable { return (Integer)methodHandle.invokeExact(testedObject); } @GenerateMicroBenchmark public Object testMethodHandle() throws Throwable { return (Integer)methodHandle.invoke(testedObject); } @GenerateMicroBenchmark public Object testMethodDirect() throws Throwable { return testedObject.getA(); } } 

 @BenchmarkMode(Mode.Throughput) @OutputTimeUnit(TimeUnit.SECONDS) @State(Scope.Thread) public class ReflectionMethodStaticAccess { private static final Class<TestedClass> clazz = TestedClass.class; Method simpleMethod; Method methodAccessible; MethodHandle methodHandle; FastMethod fastMethod; @Setup public void init() { try { simpleMethod = clazz.getMethod("getAStatic", null); Method method = clazz.getMethod("getBStatic", null); method.setAccessible(true); methodAccessible = method; fastMethod = FastClass.create(clazz).getMethod("getCStatic", null); methodHandle = MethodHandles.lookup().findStatic(clazz, "getDStatic", MethodType.methodType(Integer.class)); } catch (Exception e) { // do nothing } } @GenerateMicroBenchmark public Object testFastMethod() throws Throwable { return fastMethod.invoke(null, null); } @GenerateMicroBenchmark public Object testMethodAccessible() throws Throwable { return methodAccessible.invoke(null, null); } @GenerateMicroBenchmark public Object testMethodNotAccessible() throws Throwable { return simpleMethod.invoke(null, null); } @GenerateMicroBenchmark public Object testMethodHandleExact() throws Throwable { return (Integer)methodHandle.invokeExact(); } @GenerateMicroBenchmark public Object testMethodHandle() throws Throwable { return (Integer)methodHandle.invoke(); } @GenerateMicroBenchmark public Object testMethodDirect() throws Throwable { return TestedClass.getAStatic(); } }