Overview
- Google announced on Friday, June 5, 2026 that Chrome scored 61 on Speedometer 3.1 and 469 on JetStream 3, which the company says are new records measured on an M5 MacBook Pro running macOS 26.0.1.
- Chrome’s JetStream score is roughly 10% higher than at the start of 2026 and its Speedometer score is about 5% higher than a year ago, improvements Google links to ongoing work over the past year.
- The gains come from targeted engine work that changes how Chrome runs JavaScript and WebAssembly and how it renders pages, including async inlining and microtask dispatch fixes, SIMD code generation, BigInt tuning, and reduced memory allocations.
- Google says the wins translate into a “meaningfully faster” day-to-day experience, with the biggest user benefits expected on JavaScript‑heavy sites and compute‑intensive web apps such as AI tools and cryptography pages.
- The results are self‑reported and tied to the specific M5/macOS 26.0.1 test setup, and Google has published full methodology and raw figures on the Chromium blog for independent review and replication.