---
title: Javascript-SDK - 4.8.0-beta
slug: feature-experimentation/release-notes/javascript-sdk-4-8-0-beta
docTags: 
createdAt: 2026-07-20T15:45:04.128Z
---

## \[4.8.0-beta]

October 18, 2021

### New Features

\- Added a Lite bundle which does not include Data file manager and Event Processor packages. This reduces the bundle size up to 20% and is helpful for some platforms (such as edge service providers) that do not need extended functionality offered by these packages.

### Performance Improvements

\- Reduced SDK client initialization time by removing \`OptimizelyConfig\` creation from initialization. The \`OptimizelyConfig\` object is now created on the first call to \`getOptimizelyConfig\` API.
\- Made Improvements to logging mechanism. The SDK now no longer concatenates and formats messages which do not qualify for the log level set by the user.

[https://github.com/optimizely/javascript-sdk/releases/tag/v4.8.0-beta](https://github.com/optimizely/javascript-sdk/releases/tag/v4.8.0-beta)