🧵 Java Socket Server Performance Test: Single Thread vs Multi-thread vs Thread Pool

This project is a hands-on demonstration of different Java server concurrency models using sockets:

• ✅ Single-threaded Server
• ❌ Multi-threaded Server
• ✅ Thread Pool Server

All implementations were tested using Apache JMeter under high request loads (up to 10,000 requests per minute). Performance results are included with screenshots.

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⚙️ Technologies

• Java 8+
• Apache JMeter
• Java Networking (Sockets)
• Java Concurrency (Threads, ExecutorService)

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🚀 Server Types

1. 🔹 Single-threaded Server

• Handles one client at a time
• Good for simple or controlled environments
• Efficient at low traffic

✅ Test Result:

• Able to handle 10,000 requests/min successfully.

📸 Screenshot

Screen.Recording.2025-06-09.142723.mp4

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2. ❌ Multi-threaded Server (New Thread per Client)

• Spawns a new thread for each client connection
• Under high load, system runs out of resources

❌ Test Result:

• Fails completely at 10,000 RPM
• No successful requests

📸 Screenshot

Screen.Recording.2025-06-09.144742.mp4

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3. ✅ Thread Pool Server

• Uses Executors.newFixedThreadPool()
• Limits the number of threads
• Handles high load efficiently and safely

✅ Test Result:

• Smooth performance under high load
• 100% success rate with 10,000+ RPM

📸 Screenshot

Untitled.video.-.Made.with.Clipchamp.mp4

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🧪 JMeter Load Testing

Test Config:

• 10,000 requests per minute
• 100 concurrent threads
• 1-minute ramp-up

Metrics Tracked:

• % Success
• Avg. Response Time

Server Type	Success Rate	Notes
Single Thread	✅ 100%	Processes one request at a time
Multi Thread	❌ 0%	Crashed due to thread exhaustion
Thread Pool (10)	✅ 100%	Efficient concurrency + resource control

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💻 How to Run

🔧 Compile All Java Files

javac Server.java Client.java

🧵 Run Single Thread Server
cd single_thread
java Server

🔁 Run Multi Thread Server
cd multi_thread
java Server

🧠 Run Thread Pool Server
cd thread_pool
java Server