Method swap

core/src/main/java/io/questdb/std/LongSort.java:524–528

(LongVec vec, int a, int b)

    }

    private static void swap(LongVec vec, int a, int b) {
        long tmp = vec.getQuick(a);
        vec.setQuick(a, vec.getQuick(b));
        vec.setQuick(b, tmp);
    }
}