/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.cardinality.impl.hyperloglog.impl;
enum HyperLogLogEncoding {
/**
* Higher precision and lower memory footprint encoding relying on LINEARCOUNTING
* for estimates, suitable for small range cardinalities, or until its growing footprint
* meets the DENSE constant size.
*/
SPARSE,
/**
* Lower precision and constant memory footprint encoding relying on original HyperLogLog
* computations for estimates, and bias corrections from HyperLogLog++. Suitable for mid to large
* range cardinalities.
*/
DENSE
}