Permutive is designed and optimized to not have any impact on page load time. Here we look at how long the script takes to download and the steps we take to ensure this doesn't affect the page load.

Script Download Time

Our script typically takes <100ms to download. This will differ marginally based on the number of cohorts a user falls into although this will be tens of milliseconds different.

Methodology

Permutive's technology is designed in several ways to have no impact on page load time. This is done via:

Asynchronicity

Permutive loads asynchronously, so it doesn't directly impact the page load speed.

Compression

Permutive goes through two stages of compression: minification and gzipping. 

• All methods execute in web workers where available meaning it doesn't block JS on the page.
• All methods register callbacks rather than executing blocking code.
• Permutive caches cohorts in the browser wherever possible.