FREEDOM251

Freedom251 › PC benchmark tools

Speedometer 3.0

Free plan Web

Visit Speedometer 3.0 Alternatives

Speedometer 3.0's own site

What Speedometer 3.0 is

Speedometer 3.0 is a free, open-source browser benchmark that measures web-application responsiveness by simulating user interactions in demonstration applications. Its workloads include adding, completing, and removing 100 to-do items, editing rich text, rendering charts, and navigating or interacting with a news site. Listed technologies include React, Angular, Vue, Svelte, Preact, Lit, Backbone, jQuery, Web Components, CodeMirror, TipTap, Chart.js, and Observable Plot. The benchmark runs by visiting a normal web page in a modern browser. Results include score details and downloads in JSON, Classic JSON, and CSV formats. For more consistent runs, the instructions recommend a clean browser profile, closing other tabs and windows, keeping the benchmark focused, and using a viewport of at least 850 by 650 pixels. Speedometer does not measure concurrent asynchronous work such as Web Workers, and the project says it should not compare JavaScript frameworks. The page recommends Speedometer 3.1, which supersedes this version.

Who it suits

Speedometer 3.0 suits people measuring browser responsiveness across representative web-app interactions. It is also useful for reviewing benchmark results in downloadable formats, while noting its stated methodology limits.

What it does well

  • Open-source benchmark
  • Runs in modern web browsers
  • Tests multiple application workloads
  • Exports JSON and CSV results
  • Includes detailed score information

What to know first

  • Speedometer 3.1 supersedes this version
  • Does not measure Web Worker activity
  • Not intended for framework comparisons
  • Scores can be affected by browser conditions

Verdict

Speedometer 3.0 provides a browser-based, open-source responsiveness benchmark with varied workloads and exportable results. Use the recommended run conditions and note that the project now points users to version 3.1.

Facts from Speedometer 3.0's own pages

Accuracy guidance
The instructions recommend using a clean browser profile, closing other tabs and windows, and keeping the benchmark page focused during a run. · browserbench.org, 12 Oct 2026
Browser access
The project says the benchmark should run in every modern browser by visiting a normal web page. · github.com, 12 Oct 2026
Current version notice
The Speedometer 3.0 page recommends running Speedometer 3.1, which it says supersedes this benchmark. · browserbench.org, 11 Oct 2026
Feedback
The project directs users with feedback or questions to file issues on GitHub. · webkit.org, 12 Oct 2026
Frameworks and libraries
The listed workloads include React, Angular, Vue, Svelte, Preact, Lit, Backbone, jQuery, and Web Components. · browserbench.org, 11 Oct 2026
Method limitation
Speedometer does not attempt to measure concurrent asynchronous work such as work performed in Web Workers. · browserbench.org, 12 Oct 2026
Methodology limit
Speedometer does not attempt to measure concurrent asynchronous work such as work in Web Workers. · browserbench.org, 11 Oct 2026
Open source
Speedometer is developed as an open source project under a multistakeholder governance model involving three browser engine projects. · browserbench.org, 12 Oct 2026
Other workloads
Workloads include editing rich text, rendering charts, and reading a news site. · browserbench.org, 12 Oct 2026
Purpose
Speedometer 3.0 measures web application responsiveness by timing simulated user interactions across workloads. · browserbench.org, 12 Oct 2026
Result export formats
JSON; Classic JSON; CSV · browserbench.org, 22 Sept 2026
Results
The page provides detailed results and options to copy or download JSON and CSV results. · browserbench.org, 12 Oct 2026
Technologies tested
The listed workloads include React, Angular, Vue, Svelte, Lit, CodeMirror, TipTap, Chart.js, and Observable Plot. · browserbench.org, 12 Oct 2026
Test conditions
The instructions recommend a clean browser profile because extensions and non-default browser settings can have a large impact on scores. · browserbench.org, 11 Oct 2026
Todo workload
The todo list workload measures the time to add, complete, and remove 100 items. · browserbench.org, 12 Oct 2026
Todo workloads
Its todo workloads time adding, completing, and removing 100 items across implementations using different techniques and frameworks. · browserbench.org, 11 Oct 2026
Usage limit
The maker says Speedometer should not be used to compare the performance of different JavaScript frameworks. · browserbench.org, 11 Oct 2026
Use limitation
The project says Speedometer should not be used to compare the performance of different JavaScript frameworks. · browserbench.org, 12 Oct 2026
Version status
The Speedometer 3.0 page says Speedometer 3.1 supersedes this benchmark. · browserbench.org, 12 Oct 2026
Viewport
The benchmark page says a viewport of at least 850 by 650 pixels is recommended for the most accurate results. · browserbench.org, 12 Oct 2026
Workload areas
to-do lists; rich-text editing; chart rendering; news-site navigation · browserbench.org, 22 Sept 2026

Where Speedometer 3.0 stands on Freedom251

Look at these too