epotyom commented on code in PR #13559:
URL: https://github.com/apache/lucene/pull/13559#discussion_r1697616026
##########
lucene/core/src/java/org/apache/lucene/util/SparseFixedBitSet.java:
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@@ -353,14 +355,47 @@ public int nextSetBit(int i) {
final long indexBits = index >>> i64 >>> 1;
if (indexBits == 0) {
// no more bits are set in the current block of 4096 bits, go to the
next one
- return firstDoc(i4096 + 1);
+ return firstDoc(i4096 + 1, indices.length);
}
// there are still set bits
i64 += 1 + Long.numberOfTrailingZeros(indexBits);
final long bits = bitArray[o];
return (i64 << 6) | Long.numberOfTrailingZeros(bits);
}
+ @Override
+ public int firstSetBitInRange(int start, int upperBound) {
+ assert start < length;
+ assert upperBound >= start;
+ final int i4096 = start >>> 12;
+ final long index = indices[i4096];
+ final long[] bitArray = this.bits[i4096];
+ int i64 = start >>> 6;
+ int o = Long.bitCount(index & ((1L << i64) - 1));
Review Comment:
Makes sense!
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