---
agentTools:
  projectIndex: https://support.speedcurve.com/llms.txt
---

# RUM update: lux.js v4.1.2 and v4.1.3

Today we have release v4.1.2 of lux.js, immediately followed by v4.1.3. These updates are intended to reduce beacon payload sizes for a small number of RUM customers.

### Improvements

* Added `LUX.maxAttributionEntries` to control how many attribution entries are sent in the beacon. The default value has been reduced from 50 to 25 to reduce payload size.
* Long animation frame attribution is sorted by total duration, so the slowest scripts are prioritised in the payload.
* Minification optimizations have reduced the output size.

### Other

* Invoker and source function name have been removed from LoAF entries to reduce payload size.