Because of the map's poor design, all of the data for our hash map is kept in a single container known as a LinkedList. As a consequence, the utility of a hash map is decreased.
Because of the map's poor design, all of the data for our hash map is kept in a single container known as a LinkedList. As a consequence, the utility of a hash map is decreased.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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
Transcribed Image Text:**Understanding Linked Lists in Hash Maps**
In hash map implementations, poor design can lead to performance issues. A common mistake is storing all data in a single container, like a LinkedList. While LinkedLists are suitable for storing sequential data, they can decrease the utility of a hash map when used improperly.
**Key Issues:**
- **Efficiency:** LinkedLists require linear time complexity for search operations. In a hash map, this means longer search times when data collisions occur.
- **Performance:** Ideally, a hash map should distribute data evenly across different buckets to allow for constant time complexity operations. Using a single LinkedList negates this advantage, resulting in slower performance.
**Solution:**
To enhance the efficiency of hash maps, ensure proper distribution of data using appropriate hashing functions and avoid storing all elements in a singular container.
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Step 1
The Drawbacks of HashMap
The HashMap performs poorly when there is a chance of collision when two separate keys produce the same hashCode() result. Sometimes HashMap has to be resized since the buckets' initial size is full.
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