Method spread

core/src/main/java/io/questdb/std/Hash.java:168–170

(copied from ConcurrentHashMap) Spreads (XORs) higher bits of hash to lower and also forces top bit to 0. Because the table uses power-of-two masking, sets of hashes that vary only in bits above the current mask will always collide. (Among known examples are sets of Float keys holding consecutive wh

(int h)

     * @return adjusted hash code
     */
    public static int spread(int h) {
        return (h ^ (h >>> 16)) & SPREAD_HASH_BITS;
    }

    /**
     * Murmur3 finalizer. Kept as a private helper exclusively for