Skip to Content

Safari To Get JavaScript Speed Enhancements via SquirrelFish

The WebKit project announced this week a new and improved JavaScript interpreter, code-named SquirrelFish.

SquirrelFish promises 1.6 times faster JavaScript performance as compared to Webkit/Safari 3.1. This is accomplished by using "a register-based, direct-threaded, high-level bytecode engine" which aims to eliminate the overhead associated with traditional syntax tree walking interpreters like the one currently used in Safari 3.1.x.

012912 squirrelfish webkit graph 400
SunSpider runs per minute. Longer bars are better. Image courtesy webkit.org

The introduction of this open-source effort means these improvements will almost certainly be propagated into future versions of Apple's Safari web browser, however the timing is unknown. Javascript is a scripting language that is commonly used on many websites.

Of note, Safari 3.1 already brought dramatic speed improvements over 3.0.x, indicating Apple has been and continues to be actively engaged in Safari/WebKit JavaScript performance.

Popular Stories

Multicolored Low Cost A18 Pro MacBook Feature

Apple Accidentally Leaks 'MacBook Neo'

Tuesday March 3, 2026 7:00 am PST by
Apple appears to have prematurely revealed the name of its rumored lower-cost MacBook model, which is expected to be announced this Wednesday. A regulatory document for a "MacBook Neo" (Model A3404) has appeared on Apple's website. Unfortunately, there are no further details or images available yet. While the PDF file does not contain the "MacBook Neo" name, it briefly appeared in a link...
imac video apple feature

Apple Unveils Two New Products

Monday March 2, 2026 7:49 am PST by
Apple today introduced two new devices, including the iPhone 17e and an updated iPad Air. iPhone 17e features the same overall design as the iPhone 16e, but it gains Apple's A19 chip, MagSafe for magnetic wireless charging and magnetic accessories, Apple's second-generation C1X modem for faster 5G, and a doubled 256GB of base storage. In the U.S., the iPhone 17e starts at $599, just like the ...
MacBook Neo Feature Pastel 1

Apple Announces $599 'MacBook Neo' With A18 Pro Chip

Wednesday March 4, 2026 6:15 am PST by
Apple today announced the "MacBook Neo," an all-new kind of low-cost Mac featuring the A18 Pro chip for $599. The MacBook Neo is the first Mac to be powered by an iPhone chip; the A18 Pro debuted in 2024's iPhone 16 Pro models. Apple says it is up to 50% faster for everyday tasks than the bestselling PC with the latest shipping Intel Core Ultra 5, up to 3x faster for on-device AI workloads,...