# fx v0.0.15 cuts memory use 70% and speeds up session resumes

> Original title: fx is now much faster, smaller and efficient

- Source: Guillermo Rauch
- Published: 2026-10-28T15:25:01.000Z
- Bad Influence: https://badinfluence.news/items/hgob71gvtxlzgpj9vkrivhj5m
- Original: https://x.com/rauchg/status/2115464861534834735

## Summary

fx v0.0.15 uses 70% less memory in long sessions and shrinks the binary 7.66%, from 6.66 MiB to 6.15 MiB. Image-heavy turns process up to 3.3 times faster, and session resumes are about 18% faster.

## Post

fx is now much faster, smaller and efficient
Try https://fx.sh on your iPhone Duo

![](https://badinfluence.news/api/img-proxy?u=https%3A%2F%2Fpbs.twimg.com%2Fmedia%2FHVuj5vVbYAA27Qd.jpg&mode=thumb&exp=1793404800&sig=84112f5298cc310d)

## Quoted post @vercel_dev

> fx v0.0.15
> 
> Less memory. Faster resumes. Smaller binary.
> 
> - 70% less memory in long sessions
> - 7.66% smaller binary (6.15mib ← 6.66mib)
> - Image-heavy turn processing up to 3.3× faster
> - Session resumes about 18% faster
> - Automatic model catalog refresh
> - Fork conversations with /fork
> - Better image handling & crash recovery in libfx
> - Multiple bug fixes & security improvements
> 
> https://fx.sh/changelog#v0.0.15

https://x.com/vercel_dev/status/2115457791561539678