How to Plan Your First Website Performance Test Baseline11

How to Plan Your First Website Performance Test

A website may feel fast when one person uses it, but behave differently when many visitors arrive together. Performance testing helps teams understand response times, errors, and system behaviour under a defined workload.

A useful test starts with a clear plan: what to test, how much traffic to simulate, and what results to review.

1. Choose the User Journeys

Start with the actions that matter most to your users and business.

For an online store, these might include:

• Opening the homepage.
• Searching for a product.
• Viewing product details.
• Adding an item to the cart.
• Completing checkout using test payment details.

Include realistic pauses between actions so the workload reflects how people use the website.

2. Define Your Workload

Decide how many virtual users the test should simulate, how quickly they should join, and how long the test should run.

For this example, use the following illustrative workload:

• Virtual users: 50.
• Ramp-up period: 5 minutes.
• Steady workload: 15 minutes.
• Think time: 3–5 seconds between actions.

These values are sample inputs for testing. Adjust them to match your expected traffic and test environment.

3. Set Acceptance Criteria

Agree on measurable targets before running the test.

Example targets include:

• The 95th percentile response time stays below 2 seconds for selected requests.
• The request error rate stays below 1%.
• The system sustains the planned workload throughout the steady period.

These are illustrative targets rather than universal performance standards.

4. Prepare the Test Environment

Use an authorised test environment with suitable test accounts and data.

Confirm that the application, database, and supporting services are available. Record the application version and environment configuration so you can compare later runs fairly.

5. Run a Small Validation Test

Before starting the full workload, run the script with a small number of users.

Check that authentication works, requests use the correct data, and response assertions detect failures. A successful HTTP response does not always mean the intended business action succeeded.

6. Review the Results

Review response-time percentiles, throughput, failed requests, and system resource usage together.

Example: If response times rise while throughput stops increasing, investigate whether an application service, database, or another dependency is limiting performance.

Group errors by request or sampler to identify which user journeys need attention.

Performance Test Checklist

1. Confirm the test scope and permission.
2. Select the important user journeys.
3. Prepare test accounts and data.
4. Define the workload and acceptance criteria.
5. Validate the script with a small run.
6. Execute the planned test while monitoring the system.
7. Document findings and prioritise improvements.

Turn Results into Action

A performance report should explain the workload, observations, and practical next steps.

Record the most significant issues, assign follow-up actions, and repeat the test after changes to assess whether performance improved.