· javascript
What's new in Node.js 27
Memory limits for multi-process deployments - 3.
V8 serialization format and larger heap snapshots - 4. V8 behavior changes that can break tests and caches - 5. Deprecations, removals, and platform changes - Should you use Node.js 27 today? - Wrapping up - Frequently Asked Questions - Why did Node.js 27 start with an Alpha release in October 2026? - Will Node.js 27 become an LTS release even though 27 is an odd number? - What are the biggest JavaScript features in Node.js 27? - How did the default memory limit change in Node.js 27? - Should I run Node.js 27 in production?
On October 29, 2026, the Node.js team published v27.0.0-alpha.0.0.0. If you have been using Node.js for a few years, that version string alone probably made you do a double take. Where is the usual October v27.0.0 Current release?
Node.js 27 is the first release to follow the new annual schedule. Under the old schedule, October brought a major release that reached end of life six months later without entering Long Term Support (LTS). October now starts a six-month Alpha phase, ahead of the 27.0.0 Current release in April 2027 and LTS promotion in October 2027.
Wait, an odd-numbered Node.js release becoming LTS? Yes, the odd/even split is gone.
