[PATCH] BufferedIndexOutput - optimized writeBytes() method
-----------------------------------------------------------
Key: LUCENE-435
URL: http://issues.apache.org/jira/browse/LUCENE-435
Project: Lucene - Java
Type: Improvement
Components: Store
Reporter: Lukas Zapletal
Priority: Minor
I have created a patch that optimize writeBytes metod:
public void writeBytes(byte[] b, int length) throws IOException {
if (bufferPosition > 0) // flush buffer
flush();
if (length < BUFFER_SIZE) {
flushBuffer(b, length);
bufferStart += length;
} else {
int pos = 0;
int size;
while (pos < length) {
if (length - pos < BUFFER_SIZE) {
size = length - pos;
} else {
size = BUFFER_SIZE;
}
System.arraycopy(b, pos, buffer, 0, size);
pos += size;
flushBuffer(buffer, size);
bufferStart += size;
}
}
}
Its a much more faster now. I know that for indexing this not help much, but
for copying files in the IndexStore this is so big improvement. Its about 400%
faster that old implementation.
The patch was tested with 300MB data, "ant test" sucessfuly finished with no
errors.
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