June 25, 2019

WebKit upgrade improves memory usage

JavaScriptCore, the JavaScript engine for Apple’s WebKit browser engine, has been upgraded with a new bytecode format that improves memory efficiency and type safety.

The goal of the format, detailed in a June 21 bulletin, was to reduce memory consumption and allow the bytecode to be cached on disk. The WebKit team claims the new format uses 50 percent less memory on average, which translates to an overall 10 percent reduction in memory usage for JavaScript-heavy websites such as Facebook or Reddit.

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