| Aspect | Load Testing | Performance Testing |
|---|---|---|
| Definition | Evaluates how a system behaves under an expected load. | Measures the system's overall performance in terms of responsiveness, speed, and stability. |
| Scope | Determines the upper limit of a system's capacity and identifies potential issues under heavy load. | Encompasses various testing types, including load testing, stress testing, and scalability testing, for a comprehensive performance assessment. |
| Key Metrics | Throughput, response time, error rate, and resource utilization under specific load conditions. | Response time, latency, throughput, and resource usage under various scenarios. |
| User Behavior | Simulates a large number of virtual users accessing the system simultaneously. | Encompasses various user scenarios, including normal, peak, and stress conditions. |
| Goals | Identify performance bottlenecks and assess the system's ability to handle specific loads. | Evaluate overall system performance under various conditions and uncover areas for improvement. |
| Scalability | Assesses how well the system can handle a predefined number of users or transactions. | Encompasses scalability testing to assess the system's ability to scale with increasing loads. |
| Realism | Focuses on simulating realistic user loads but may not cover all possible user scenarios. | Encompasses a broader scope, including various testing types to simulate real-world scenarios. |
| Outcome | Highlights system limitations under normal and peak conditions. | Provides a holistic view of the system's performance, facilitating improvements for optimal user experience. |
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