jpountz commented on a change in pull request #556: LUCENE-8673: Use radix partitioning when merging dimensional points URL: https://github.com/apache/lucene-solr/pull/556#discussion_r253381960
########## File path: lucene/core/src/java/org/apache/lucene/util/bkd/BKDRadixSelector.java ########## @@ -0,0 +1,433 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.lucene.util.bkd; + +import java.io.IOException; +import java.util.Arrays; + +import org.apache.lucene.store.Directory; +import org.apache.lucene.util.BytesRef; +import org.apache.lucene.util.FutureArrays; +import org.apache.lucene.util.IntroSelector; + +/** + * + * Offline Radix selector for BKD tree. + * + * @lucene.internal + * */ +public final class BKDRadixSelector { + //size of the histogram + private static final int HISTOGRAM_SIZE = 256; + // we store one histogram per recursion level + private final long[][] histogram; + //bytes we are sorting + private final int bytesPerDim; + // number of bytes to be sorted: bytesPerDim + Integer.BYTES + private final int bytesSorted; + //data dimensions size + private final int packedBytesLength; + //flag to when we are moving to sort on heap + private final int maxPointsSortedOffHeap; Review comment: s/Off/On/ ? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org
