A new post on Google’s Chromium blog shares the results of the latest Chrome performance benchmarks, including record scores on tests running on an M5 MacBook Pro. Here are the details.

Last June, Google published a post on its Chromium blog showing how Chrome’s Speedometer 3.1 benchmark score had improved across recent browser releases, from Chrome 128 to Chrome 139 dev, based on tests run on an M4 MacBook Pro running macOS 15.

The Speedometer benchmark, as Google explains, is “created in open collaboration with other browsers and measures web application responsiveness through workloads that cover a large variety of different areas of the Blink rendering engine used in Chrome.”

These areas include HTML parsing, JavaScript and JSON processing, and pixel rendering, among others.

This week, Google said Chrome reached a new Speedometer 3.1 record of 61 on an M5 MacBook Pro running macOS 26.0.1, a 5% increase from the year-ago benchmark results.

The company also shared its latest results for the JetStream 3 benchmark, which “is a JavaScript and WebAssembly benchmark suite focused on advanced web applications,” according to BrowserBench.

JetStream 3.0 was announced in March and, like Speedometer 3.1, was developed as a collaborative effort involving engineers working on major JavaScript and WebAssembly engines, with contributors from Apple, Google, Mozilla, and other companies.

In the JetStream 3 benchmark, Chrome scored 469 points on an M5 MacBook Pro running macOS 26.0.1. The company touted the result as a 10% improvement, from another test performed “just the start of this year.”

According to Google, these results “directly translate into a meaningfully faster experience for our users.”

The Chromium post dives deeper into the recent improvements and test results for JavaScript, WebAssembly, and its rendering engine, and you can read it in full here.

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