Chrome Hits Record Speedometer and JetStream Scores on MacBook Pro

Chrome has set new browser performance records on a MacBook Pro powered by Apple's M5 chip, according to Google, posting its highest-ever scores on both the Speedometer 3.1 and JetStream 3 benchmarks.



Chrome scored 61 on Speedometer, a 5% improvement over the past year, and 469 on JetStream 3, up 10% since the start of 2026. Google says the results give Chrome a dual record across all browsers, ahead of every other Mac browser, including Safari.


The performance gains come from optimizations across Chrome's JavaScript engine, WebAssembly support, and Blink rendering engine. On the JavaScript side, the team introduced "fast path" inlining for common operations, allowing the engine to skip unnecessary execution steps. Some of the largest gains came from async operations such as microtask dispatch and await resolution. Similar techniques were also applied to sorting and string comparisons. The company also adjusted how Chrome decides when functions should be optimized, particularly for async and generator functions, while reducing some internal memory allocations. Chrome's BigInt implementation also received improvements in division, canonicalisation, and data structure allocation.

WebAssembly workloads saw improvements to SIMD code generation and register allocation, helping AI, cryptography, and interpreter use cases. Chrome also reduced overhead for JavaScript-to-WebAssembly calls by eliminating redundant type conversions and loads inside loops.

Rendering engine updates focused on style computation, DOM operations, and text processing. A unified querySelector() cache reduces redundant DOM lookups, while SIMD operations speed up string copying and creation during HTML parsing. Chrome also expanded caching for dataURI resources, reduced style recalculation delays for transitions, and simplified CSS selector caching and matching. Additional work addressed font fallback issues, reduced glyph-width calculation overhead, introduced an SVG processing cache, and streamlined DOM storage structures.

The tests were conducted on a MacBook Pro with Apple's M5 chip running macOS 26.0.1, though Google did not specify whether the system used an M5, M5 Pro, or M5 Max configuration.


Google says the benchmark improvements translate into a "meaningfully faster" day-to-day browsing experience, with additional JavaScript optimizations planned.

Google's benchmark scores are self-reported. Detailed results are available on the Chromium Blog.