Java-efficiency-test

Small academic project (polished) that benchmarks the efficiency of adding custom objects to common Java collections (e.g., ArrayList, LinkedList, HashSet, TreeSet).
Originally developed for coursework; refined after evaluation.

What it measures

• Time to insert N elements of a custom type into different collections

Requirements

• Java 17+ (any JDK vendor)

How to Run

Option 1 - Run directly from source

javac EfficiencyTest.java
java EfficiencyTest

Option 2 - Run the prebuilt JAR

Download the latest release: EfficiencyTest.jar (latest)

Then run it:

java -jar EfficiencyTest.jar

Option 3 — In an IDE

Open the repo in IntelliJ IDEA, Eclipse, or VS Code and run the EfficiencyTest class.

Example output

Data type	Collection Type	Number of instances	Creation time
Boolean	ArrayList	1,232,131	72 ns
Double	ArrayList	13,451,451	919 ns
Person	HashSet	124,161	21 ns
Color	TreeSet	4,567,241	432 ns