Question 1

How do I run a basic load test with Vegeta?

Accepted Answer

Use the attack command with a target, e.g., 'echo GET http://example.com | vegeta attack -duration=5s | vegeta report'. This sends requests at the default rate and outputs a text report with latency metrics.

Question 2

Vegeta vs Apache JMeter: which is better for HTTP testing?

Accepted Answer

Vegeta excels at constant rate testing with precise control and avoids coordinated omission, while JMeter offers a GUI and more protocol support. Choose Vegeta for accurate, scriptable HTTP load tests.

Question 3

Can Vegeta handle authentication in API requests?

Accepted Answer

Yes, you can add headers like Authorization with the -header flag or include basic auth in URLs, as shown in the http format examples in the README.

Question 4

What does 'coordinated omission' mean in load testing?

Accepted Answer

It's a flaw where testers ignore delays during request generation, skewing latency metrics. Vegeta avoids this by accurately measuring latency even during bursts, ensuring realistic performance data.

Question 5

How to generate dynamic request bodies with Vegeta?

Accepted Answer

Use the JSON format with base64 encoding and tools like jq for streaming, as demonstrated in the 'Generated targets' section, allowing for custom body generation on the fly.

Question 6

Is Vegeta good for long-term stress testing?

Accepted Answer

Yes, with the -duration flag, but ensure system limits like file descriptors are tuned, and consider distributed setups for high volumes to avoid resource exhaustion.

Vegeta

What is Vegeta?

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