Every six weeks, we create a new branch of V8 as part of our release process. Each version is branched from V8’s Git master immediately before a Chrome Beta milestone. Today we’re pleased to announce our newest branch, V8 version 5.4, which will be in beta until it is released in coordination with Chrome 54 Stable in several weeks. V8 v5.4 is filled with all sorts of developer-facing goodies, so we’d like to give you a preview of some of the highlights in anticipation of the release.
Performance improvements #
V8 v5.4 delivers a number of key improvements in memory footprint and startup speed. These primarily help accelerate initial script execution and reduce page load in Chrome.
In 5.4 we tuned V8’s garbage collector for low-memory devices with 512 MB RAM or less. Depending on the website displayed this reduces peak memory consumption of on-heap memory up to 40%.
Startup & speed #
V8 API #
Please check out our summary of API changes. This document is regularly updated a few weeks after each major release.
Developers with an active V8 checkout can use
git checkout -b 5.4 -t branch-heads/5.4 to experiment with the new features in V8 v5.4. Alternatively you can subscribe to Chrome’s Beta channel and try the new features out yourself soon.