pmpailis commented on code in PR #13076:
URL: https://github.com/apache/lucene/pull/13076#discussion_r1479853108
##########
lucene/core/src/java/org/apache/lucene/util/VectorUtil.java:
##########
@@ -214,4 +214,19 @@ public static float[] checkFinite(float[] v) {
}
return v;
}
+
+ public static int binaryHammingDistance(byte[] a, byte[] b) {
+ int distance = 0, i = 0;
+ for (final int upperBound = a.length & ~(Long.BYTES - 1); i < upperBound;
i += Long.BYTES) {
+ distance +=
+ Long.bitCount(
+ ((long) BitUtil.VH_NATIVE_LONG.get(a, i) ^ (long)
BitUtil.VH_NATIVE_LONG.get(b, i))
+ & 0xFFFFFFFFFFFFFFFFL);
Review Comment:
Yeah, you're right - missed to update this after the initial comment. Done
in 49b400bf9b9e41e7478b9cfd145e9a30afdf79c9
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