C Program: Collision Resolution Performance Analysis
8. Collision Resolution Performance Comparison Challenges
Write a C program that compares the performance of different collision resolution methods (chaining, linear probing, etc.) in terms of speed and memory usage.
Sample Solution:
C Code:
Output:
Linear Probing - Retrieved value for key 'Key1007': Value1007 Linear Probing - Retrieved value for key 'Key1008': Value1008 Linear Probing - Retrieved value for key 'Key1009': Value1009 Linear Probing - Retrieved value for key 'Key1010': Value1010 Linear Probing - Retrieved value for key 'Key1011': Value1011 Linear Probing - Retrieved value for key 'Key1012': Value1012 Linear Probing - Retrieved value for key 'Key1013': Value1013 Linear Probing - Retrieved value for key 'Key1014': Value1014 Linear Probing - Retrieved value for key 'Key1015': Value1015 Linear Probing - Retrieved value for key 'Key1016': Value1016 Linear Probing - Retrieved value for key 'Key1017': Value1017 Linear Probing - Retrieved value for key 'Key1018': Value1018 Linear Probing - Retrieved value for key 'Key1019': Value1019 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Explanation:
In the exercise above,
- Hash table structure:
- The program defines a structure 'KeyValuePair' for a key-value pair and a structure 'HashTable' for a hash table.
- The hash table uses an array of pointers to 'KeyValuePair' structures (struct KeyValuePair** table).
- Hash function:
- The hashFunction is a simple hash function (djb2 algorithm) that generates a hash value for a given string.
- Key-Value Pair Creation:
- The createKeyValuePair function dynamically allocates memory for a new key-value pair and initializes its fields.
- Hash table creation:
- The createHashTable function dynamically allocates memory for a new hash table and initializes its fields.
- Chaining Operations:
- insertChaining: Inserts a key-value pair into the hash table using chaining.
- retrieveChaining: Retrieves the value associated with a key using chaining.
- freeHashTableChaining: Frees the memory allocated for the hash table using chaining.
- Linear probing operations:
- insertLinearProbing: Inserts a key-value pair into the hash table using linear probing.
- retrieveLinearProbing: Retrieves the value associated with a key using linear probing.
- freeHashTableLinearProbing: Frees the memory allocated for the hash table using linear probing.
- Performance testing:
- The testChaining and testLinearProbing functions perform performance testing for chaining and linear probing, respectively.
- Key-value pairs are inserted into the hash table, and then retrieval operations are performed.
- Main functions:
- The "main()" function measures the duration of the chaining and linear probing tests using the
library for timing. - The program prints the duration of each test, providing insights into the performance of the two collision resolution methods.
Flowchart
For more Practice: Solve these Related Problems:
- Write a C program to benchmark and compare insertion times for hash tables using chaining and linear probing.
- Write a C program to measure memory usage differences between open addressing and chaining in hash table implementations.
- Write a C program to calculate the average number of probes per insertion for various collision resolution methods.
- Write a C program to simulate high load factor scenarios and compare the performance of different collision resolution techniques.
C Programming Code Editor:
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