Does Uxify slow down your site?
Not at all. Uxify is designed with performance at its core - both the Uxify's main snippet and the Early snippet are carefully engineered to optimize for speed, not compromise it.
Still, we know the concern is valid: any JavaScript added to a site can, in theory, introduce performance cost. So let’s unpack how our scripts behave, what metrics they may (or may not) affect, and what you can expect in practice.
Real-world test of Uxify's affect on performance
To understand how Uxify snippet behaves in real-world conditions, we ran performance tests on several production websites actively using it.
Testing conditions
Period: 30 days
Connection: All real-world connections (3G, 4G, 5G, Wi-Fi, Ethernet, etc.)
Browser: Chrome and Chromium
Device: All device types included
Scenario: Normal user sessions with both Uxify scripts active
Website | Main traffic | Avg daily sessions | Total blocking time | Download script size (kB) |
Blog | China | 18904 | 0 | 63 |
Online store | Australia | 13285 | 0 | 63 |
Online store | UK | 8914 | 0 | 64 |
Online store | Greece | 8412 | 0 | 63 |
Pharmacy | US | 7039 | 0 | 63 |
Total blocking time:
This measures how long the browser’s main thread was blocked by Uxify. Across 30 days of traffic, all tested sites reported 0 ms, meaning the scripts did not interrupt rendering.
Download script size:
The initial download is ~63 kB. After that, the script is cached by the browser, and subsequent loads only require a tiny revalidation request.
Bottom line
The Uxify platform was built by performance engineers - we know that every millisecond counts. Our scripts are tuned to stay out of your site’s way while actively improving how fast it feels.
Still have questions? Reach out to our support team →