Changelog

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v0.2.0 (2026-10-20)

  • Start iterations at a rate with :rate, :rate_stages and :max_vus, reusing idle VUs and counting the iterations that cannot start as "iterations.dropped"
  • Spread a run over several nodes with :nodes, or --nodes from the command line, loading the scenario on the nodes that miss it
  • Stampede.HTTP, a client that keeps each VU's connections open between requests and records "http.request"
  • Checks, with Stampede.check/2 and the :failed and :failed_rate thresholds
  • A timeline of every second of the run in Stampede.Result
  • Stampede.Reporter.to_json/1 and mix stampede.run --out
  • Telemetry events for runs, timings, counters and checks
  • A :match option for Stampede.Channels.await/4 and Stampede.LiveView.await/2
  • mix stampede.run --rate and --max-vus

Changes

  • LiveView page loads reuse their connection, as browsers do. A server holds an idle connection per user as a result, so numbers can differ from the ones measured with 0.1.
  • Runs no longer leave monitor messages in the caller's mailbox.

v0.1.0 (2026-10-20)

First release.

  • Scenarios with stages, setup data and thresholds
  • Timings with percentiles accurate to 1%, and counters
  • A Phoenix Channels client with heartbeats, replies, broadcasts and both serializers
  • A LiveView client that loads the page, following redirects, joins with its tokens and cookies, sends clicks, form changes and submits to the LiveView or one of its components, and patches and navigates between LiveViews
  • mix stampede.run, which exits with status 1 when a threshold fails