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8213033: Archive remaining primitive box caches

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Reviewed-by: jiangli, alanb
This commit is contained in:
Claes Redestad 2018-11-20 21:12:46 +01:00
parent 4a235517f9
commit 4b45441ae9
9 changed files with 117 additions and 50 deletions
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21
src/java.base/share/classes/java/lang/Byte.java
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@ -26,6 +26,7 @@
package java.lang;
import jdk.internal.HotSpotIntrinsicCandidate;
import jdk.internal.misc.VM;
/**
*
@ -77,13 +78,25 @@ public final class Byte extends Number implements Comparable<Byte> {
}
private static class ByteCache {
private ByteCache(){}
private ByteCache() {}
static final Byte cache[] = new Byte[-(-128) + 127 + 1];
static final Byte[] cache;
static Byte[] archivedCache;
static {
for(int i = 0; i < cache.length; i++)
cache[i] = new Byte((byte)(i - 128));
final int size = -(-128) + 127 + 1;
// Load and use the archived cache if it exists
VM.initializeFromArchive(ByteCache.class);
if (archivedCache == null || archivedCache.length != size) {
Byte[] c = new Byte[size];
byte value = (byte)-128;
for(int i = 0; i < size; i++) {
c[i] = new Byte(value++);
}
archivedCache = c;
}
cache = archivedCache;
}
}