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code polish

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This commit is contained in:
nathan 2016-02-06 01:07:32 +01:00
parent b2cbd9c084
commit 7822448427
1 changed files with 17 additions and 11 deletions
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28
test/dorkbox/util/messagebus/perfTests/BenchmarkReflection.java
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@ -33,11 +33,13 @@ public abstract class BenchmarkReflection {
abstract int run(int iterations) throws Throwable; abstract int run(int iterations) throws Throwable;
private BigDecimal time() { private
BigDecimal time() {
try { try {
int nextI = 1; int nextI = 1;
int i; int i;
long duration; long duration;
do { do {
i = nextI; i = nextI;
long start = System.nanoTime(); long start = System.nanoTime();
@ -45,6 +47,8 @@ public abstract class BenchmarkReflection {
duration = System.nanoTime() - start; duration = System.nanoTime() - start;
nextI = i << 1 | 1; nextI = i << 1 | 1;
} while (duration < 100000000 && nextI > 0); } while (duration < 100000000 && nextI > 0);
return new BigDecimal(duration * 1000 / i).movePointLeft(3); return new BigDecimal(duration * 1000 / i).movePointLeft(3);
} catch (Throwable e) { } catch (Throwable e) {
throw new RuntimeException(e); throw new RuntimeException(e);
@ -75,20 +79,22 @@ public abstract class BenchmarkReflection {
public static void main(String[] args) throws Exception { public static void main(String[] args) throws Exception {
final C invocationTarget = new C(); final C invocationTarget = new C();
final Method m = C.class.getMethod("foo"); final Method m_normal = C.class.getMethod("foo");
final Method am = C.class.getMethod("foo");
am.setAccessible(true);
final MethodHandle mh = sfmh;
final MethodAccess ma = MethodAccess.get(C.class); final Method m_setAccessible = C.class.getMethod("foo");
final int mi = ma.getIndex("foo"); m_setAccessible.setAccessible(true);
final MethodAccess m_asm = MethodAccess.get(C.class);
final int mi = m_asm.getIndex("foo");
final MethodHandle mh = sfmh;
BenchmarkReflection[] marks = { BenchmarkReflection[] marks = {
new BenchmarkReflection("reflective invocation (without setAccessible)") { new BenchmarkReflection("reflective invocation (without setAccessible)") {
@Override int run(int iterations) throws Throwable { @Override int run(int iterations) throws Throwable {
int x = 0; int x = 0;
for (int i = 0; i < iterations; i++) { for (int i = 0; i < iterations; i++) {
x += (Integer) m.invoke(invocationTarget); x += (Integer) m_normal.invoke(invocationTarget);
} }
return x; return x;
} }
@ -97,7 +103,7 @@ public abstract class BenchmarkReflection {
@Override int run(int iterations) throws Throwable { @Override int run(int iterations) throws Throwable {
int x = 0; int x = 0;
for (int i = 0; i < iterations; i++) { for (int i = 0; i < iterations; i++) {
x += (Integer) am.invoke(invocationTarget); x += (Integer) m_setAccessible.invoke(invocationTarget);
} }
return x; return x;
} }
@ -107,12 +113,12 @@ public abstract class BenchmarkReflection {
@Override int run(int iterations) throws Throwable { @Override int run(int iterations) throws Throwable {
int x = 0; int x = 0;
for (int i = 0; i < iterations; i++) { for (int i = 0; i < iterations; i++) {
x += (Integer) ma.invoke(invocationTarget, mi, (Object)null); x += (Integer) m_asm.invoke(invocationTarget, mi, (Object)null);
} }
return x; return x;
} }
}, },
new BenchmarkReflection("methodhandle invocation") { new BenchmarkReflection("methodhandle (local) invocation") {
@Override int run(int iterations) throws Throwable { @Override int run(int iterations) throws Throwable {
int x = 0; int x = 0;