JPA findAll(Specification specification, Pageable pageable) count is very costly and slow

Question

public Page<MyObject> findByCriteria(MySearchFilters mySearchFilters, PageRequest pageRequest) {
        Page<MyObject> all = myObjectRepository.findAll(new Specification<MyObject>() {
            @Override
            public Predicate toPredicate(Root<MyObject> root, CriteriaQuery<?> query, CriteriaBuilder criteriaBuilder) {
                List<Predicate> predicates = new ArrayList<>();

            ................ here is lots of different optional fields that might or not get added to query

                return criteriaBuilder.and(predicates.toArray(new Predicate[predicates.size()]));
            }

            private void addLikeCriteria(String field, String fieldName, CriteriaBuilder criteriaBuilder, Root<MyObject> root, List<Predicate> predicates) {
                predicates.add(criteriaBuilder.like(criteriaBuilder.lower(root.get(fieldName).as(String.class)), "%" + field.toLowerCase() + "%"));
            }
        }, pageRequest);
        return all;
    }

I am calling the method which in the background does the also count(field) query that is very costly! I analyzed it and if it would do count(*) instead it would be 10x faster as then it does not have to check the value.

Page<T> findAll(@Nullable Specification<T> spec, Pageable pageable);

Is it possible to make it count() instead or should I make a custom Specification, pageable repository method that would not do the count(field) and do the count() myself to attach to the result?