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Code Issues Releases Wiki Activity

java-decompiler: minor optimization (no more empty array creation)

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This commit is contained in:
Roman Shevchenko 2014-10-06 17:26:24 +02:00
parent 8462998a86
commit bef17b44fc
4 changed files with 10 additions and 6 deletions
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5
src/org/jetbrains/java/decompiler/struct/attr/StructLineNumberTableAttribute.java
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@ -17,6 +17,7 @@ package org.jetbrains.java.decompiler.struct.attr;
import org.jetbrains.java.decompiler.struct.consts.ConstantPool;
import org.jetbrains.java.decompiler.util.DataInputFullStream;
import org.jetbrains.java.decompiler.util.InterpreterUtil;
import java.io.IOException;
@ -29,7 +30,7 @@ import java.io.IOException;
* Created by Egor on 05.10.2014.
*/
public class StructLineNumberTableAttribute extends StructGeneralAttribute {
private int[] myLineInfo = new int[0];
private int[] myLineInfo = InterpreterUtil.EMPTY_INT_ARRAY;
@Override
public void initContent(ConstantPool pool) throws IOException {
@ -44,7 +45,7 @@ public class StructLineNumberTableAttribute extends StructGeneralAttribute {
}
}
else if (myLineInfo.length > 0) {
myLineInfo = new int[0];
myLineInfo = InterpreterUtil.EMPTY_INT_ARRAY;
}
}

1
src/org/jetbrains/java/decompiler/util/FastSparseSetFactory.java
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@ -88,6 +88,7 @@ public class FastSparseSetFactory<E> {
public static class FastSparseSet<E> implements Iterable<E> {
public static final FastSparseSet[] EMPTY_ARRAY = new FastSparseSet[0];
private FastSparseSetFactory<E> factory;

2
src/org/jetbrains/java/decompiler/util/InterpreterUtil.java
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@ -29,6 +29,8 @@ import java.util.zip.ZipFile;
public class InterpreterUtil {
public static final boolean IS_WINDOWS = System.getProperty("os.name", "").startsWith("Windows");
public static final int[] EMPTY_INT_ARRAY = new int[0];
private static final int CHANNEL_WINDOW_SIZE = IS_WINDOWS ? 64 * 1024 * 1024 - (32 * 1024) : 64 * 1024 * 1024; // magic number for Windows
private static final int BUFFER_SIZE = 16 * 1024;

8
src/org/jetbrains/java/decompiler/util/SFormsFastMapDirect.java
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@ -38,9 +38,9 @@ public class SFormsFastMapDirect {
private SFormsFastMapDirect(boolean initialize) {
if (initialize) {
for (int i = 2; i >= 0; i--) {
@SuppressWarnings("unchecked") FastSparseSet<Integer>[] empty = new FastSparseSet[0];
@SuppressWarnings("unchecked") FastSparseSet<Integer>[] empty = FastSparseSet.EMPTY_ARRAY;
elements[i] = empty;
next[i] = new int[0];
next[i] = InterpreterUtil.EMPTY_INT_ARRAY;
}
}
}
@ -99,8 +99,8 @@ public class SFormsFastMapDirect {
while (pointer != 0);
}
else {
mapelements[i] = new FastSparseSet[0];
mapnext[i] = new int[0];
mapelements[i] = FastSparseSet.EMPTY_ARRAY;
mapnext[i] = InterpreterUtil.EMPTY_INT_ARRAY;
}
}