Sulkta-OSS/dynmap-neoforge
2
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Performance tuning, improve workaround for bukkit scheduler bugs

Browse source
This commit is contained in:
Mike Primm 2011-07-19 00:52:05 -05:00
parent b51bb22b9e
commit 2c16c800e9
14 changed files with 412 additions and 303 deletions
Download patch file Download diff file Expand all files Collapse all files

19
src/main/java/org/dynmap/TileHashManager.java
View file

@ -101,6 +101,7 @@ public class TileHashManager {
private Object lock = new Object();
private LRULinkedHashMap<TileHashFile, byte[]> tilehash = new LRULinkedHashMap<TileHashFile, byte[]>(MAX_CACHED_TILEHASHFILES);
private CRC32 crc32 = new CRC32();
private byte[] crcworkbuf = new byte[8192];
public TileHashManager(File tileroot, boolean enabled) {
tiledir = tileroot;
@ -130,15 +131,19 @@ public class TileHashManager {
return 0; /* Return value that doesn't match */
}
synchronized(lock) {
if(crcworkbuf.length < (4*newbuf.length)){
crcworkbuf = new byte[4*newbuf.length];
}
for(int i = 0, off = 0; i < newbuf.length; i++) {
int v = newbuf[i];
crcworkbuf[off++] = (byte)v;
crcworkbuf[off++] = (byte)(v>>8);
crcworkbuf[off++] = (byte)(v>>16);
crcworkbuf[off++] = (byte)(v>>24);
}
/* Calculate CRC-32 for buffer */
crc32.reset();
for(int i = 0; i < newbuf.length; i++) {
int v = newbuf[i];
crc32.update(0xFF & v);
crc32.update(0xFF & (v >> 8));
crc32.update(0xFF & (v >> 16));
crc32.update(0xFF & (v >> 24));
}
crc32.update(crcworkbuf, 0, 4*newbuf.length);
return crc32.getValue();
}
}