# JetStream 3: A modern benchmark for high-performance, compute-intensive Web applications

DevFeed: [JetStream 3: A modern benchmark for high-performance, compute-intensive Web applications](<https://devfeed.tech/articles/jetstream-3-a-modern-benchmark-for-high-performance-compute-intensive-web-applications-4199.md>)

Original publisher: [Read original article](<https://blog.chromium.org/2026/03/jetstream-3-a-modern-benchmark.html>)

Author: Chromium Blog (noreply@blogger.com)

Published: 2026-03-31T18:25:00Z

Content type: release

Language: en

Sources: [Chromium Blog](<https://devfeed.tech/sources/chromium-blog.md>)

Topics: [jetstream](<https://devfeed.tech/topics/jetstream.md>), [Benchmark](<https://devfeed.tech/topics/benchmark.md>), [benchmarking](<https://devfeed.tech/topics/benchmarking.md>), [Web](<https://devfeed.tech/topics/web.md>), [web applications](<https://devfeed.tech/topics/web-applications.md>)

Tags: [benchmark](<https://devfeed.tech/tags/benchmark.md>), [benchmarking](<https://devfeed.tech/tags/benchmarking.md>), [browser](<https://devfeed.tech/tags/browser.md>), [jetstream](<https://devfeed.tech/tags/jetstream.md>), [none](<https://devfeed.tech/tags/none.md>), [the-fast-and-the-curious](<https://devfeed.tech/tags/the-fast-and-the-curious.md>), [web](<https://devfeed.tech/tags/web.md>), [web-applications](<https://devfeed.tech/tags/web-applications.md>)

## AI overview

This article introduces JetStream 3, a benchmark for high-performance, compute-intensive Web applications. It explains the benchmark's methodology, the reasons for updating JetStream 2, and the collaborative governance involving major browser-engine contributors.

## Source excerpt

We're incredibly excited to announce the release of JetStream 3, built in close collaboration with Apple, Mozilla, and other partners in the web ecosystem! While we've covered the high-level details of this release in our shared announcement blog post, we wanted to take a moment here to dive a little deeper. In this post, we'll pull back the curtain on the benchmark itself, explore the methodology behind our choices, and share the motivations driving these major updates. Why Do We Benchmark, Anyway? Before we get into the "what," it helps to talk about the "why." Why do browser engineers care so much about benchmarks? At its core, benchmarking serves as a critical safety net for catching performance regressions before they ever reach users. But beyond that, benchmarks act as a powerful motivation function--a sort of "gamification" for browser engineers. Having a clear target helps us prioritize our efforts and decide exactly which optimizations deserve our focus. It also drives healthy competitiveness between different browser engines, which ultimately lifts the entire web ecosystem. Of course, the ultimate goal isn't just to make a number on a chart go up; it's to meaningfully improve user experience and real-world performance. Driven by Open Governance Just like Speedometer 3, JetStream 3 is the result of a massive collaborative effort across all major browser engines, including Apple, Mozilla, and Google. We adopted a strict consensus model for this release. This means we only added new workloads when everyone agreed they were valuable and representative. This open governance model has led to an incredibly productive collaboration with buy-in from multiple parties, ensuring the benchmark serves the best interests of the overall Web ecosystem. Ripe for an Update The last major release, JetStream 2, came out in 2019. In the technology space--and especially on the Web--six years is an eternity. There's a well-known concept in economics called Goodhart's Law, which stat