Reflection performance

Foo.java

package functional;

class Foo {
    public String bar() {
        if (System.currentTimeMillis() > 0) {return null;}
        return "baz";
    }
}

FunctionBenchmark.java

package functional;

import com.google.caliper.SimpleBenchmark;
import com.google.common.base.Function;

public class FunctionBenchmark extends SimpleBenchmark {
    final Foo                   foo = new Foo();
    final Function<Foo, String> f   = new Function<Foo, String>() {
                                        @Override public String apply(Foo input) {
                                            return input.bar();
                                        }
                                    };

    public String timeCall(int n) {
        String s = null;
        for (int i = 0; i < n; i++) {
            s = f.apply(foo);
        }
        return s;
    }

}

MethodCallBenchmark.java

package functional;

import com.google.caliper.SimpleBenchmark;

public class MethodCallBenchmark extends SimpleBenchmark {
    final Foo foo = new Foo();

    public String timeCall(int n) {
        String s = null;
        for (int i = 0; i < n; i++) {
            s = foo.bar();
        }
        return s;
    }
}

ReflectionBenchmark.java

package functional;

import java.lang.reflect.Method;

import com.google.caliper.SimpleBenchmark;
import com.google.common.base.Function;

@SuppressWarnings({ "unchecked", "rawtypes" })
public class ReflectionBenchmark extends SimpleBenchmark {
    final Foo                   foo = new Foo();
    final Function<Foo, String> f   = new Function() {
                                        final Method method;
                                        {
                                            try {
                                                method = Foo.class.getMethod("bar");
                                            } catch (Exception e) {
                                                throw new RuntimeException(e);
                                            }
                                        }

                                        @Override public Object apply(Object input) {
                                            try {
                                                return method.invoke(input);
                                            } catch (Exception e) {
                                                throw new RuntimeException(e);
                                            }
                                        }
                                    };

    public String timeCall(int n) {
        String s = null;
        for (int i = 0; i < n; i++) {
            s = f.apply(foo);
        }
        return s;
    }

}

java -cp .:../lib/caliper-0.5-rc1.jar:../lib/guava-osgi-11.0.0.jar:../lib/gson-1.7.1.jar com.google.caliper.Runner functional.MethodCallBenchmark
0% Scenario{vm=java, trial=0, benchmark=Call} 146.04 ns; σ=0.79 ns @ 3 trials

java -cp .:../lib/caliper-0.5-rc1.jar:../lib/guava-osgi-11.0.0.jar:../lib/gson-1.7.1.jar com.google.caliper.Runner functional.FunctionBenchmark
0% Scenario{vm=java, trial=0, benchmark=Call} 145.67 ns; σ=0.14 ns @ 3 trials

java -cp .:../lib/caliper-0.5-rc1.jar:../lib/guava-osgi-11.0.0.jar:../lib/gson-1.7.1.jar com.google.caliper.Runner functional.ReflectionBenchmark
0% Scenario{vm=java, trial=0, benchmark=Call} 161.13 ns; σ=5.71 ns @ 10 trials