---
title: Javascript-SDK - 4.9.4
slug: feature-experimentation/release-notes/javascript-sdk-4-9-4
docTags: 
createdAt: 2026-07-20T15:45:12.674Z
---

## [#494---june-8-2023](docId:8llFfcD6ePk2qaNkKcDBn)\[4.9.4] - June 8, 2023

### [#performance-improvements](docId:8llFfcD6ePk2qaNkKcDBn)Performance Improvements

- Improve OptimizelyConfig class instantiation performance from O(n^2) to O(n) where n = number of feature flags ([#829](https://github.com/optimizely/javascript-sdk/pull/829))

[https://github.com/optimizely/javascript-sdk/releases/tag/v4.9.4](https://github.com/optimizely/javascript-sdk/releases/tag/v4.9.4)