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Load and Performance Testing with the Nauthilus CSV Test Client

· 8 min read
Christian Roessner
Christian Roessner
Maintainer of Nauthilus

This guide is for anyone who wants a quick, reliable way to see how Nauthilus handles authentication under load. In a few minutes you’ll drive realistic requests from a CSV and get clear counters for throughput and failures—perfect for spotting regressions and finding safe limits.

If you just want the commands, start with the TL;DR below. The rest of the article explains scenarios, tips, and tuning—everything verified against the repository files client/README.md and client/nauthilus-testing.yml.

TL;DR​

  1. Build the client
cd client
go build -o nauthilus-testclient
  1. Start the server with the test config
TESTING_CSV=client/logins.csv ./nauthilus -config client/nauthilus-testing.yml -config-format yaml
  1. Run a small load
./nauthilus-testclient --csv ./client/logins.csv --concurrency 8 --rps 40 --json-ok

You’ll see total/failed requests and throughput. Increase --rps/--concurrency to explore limits.