🆚 Preload vs. Rocket Loader
- 📈 Preload is much more popular than Rocket Loader.
- 🌎 Preload is more popular in the United States, Germany, and the United Kingdom.
- 🌍 Rocket Loader is more popular in the Marshall Islands and Wallis and Futuna.
Statistics based on 3.8M+ analyzed websites. About this data
Preload
Rocket LoaderType
Performance optimization technology
Performance optimization technology
About
The rel="preload" attribute on 
HTML <link> elements instructs web browsers to fetch important resources early before they are requested during page rendering.
It is commonly used to prioritize fonts, stylesheets, scripts, images, and other critical assets, helping reduce render delays and improve page loading performance.
CloudFlare Rocket Loader prioritizes website content by delaying loading of all 
JavaScript until after rendering.
Headquarters
Cambridge, Massachusetts, United States
San Francisco, California, United States
Pricing
Free version ✔️
Pro $25/month
Business $250/month
Enterprise Custom
Categories
Popularity
Determined by the number of sites using each technology.
Preload performance optimization technology is 22 times more popular than Rocket Loader.
Total websites
Market share
Performance Optimization
Popularity by country
Determined by the number of sites detected from each country.
Preload is more popular in the United States, Germany, and the United Kingdom, while Rocket Loader is more popular in the Marshall Islands and Wallis and Futuna.
United States
Germany
United Kingdom
France
Spain
Netherlands
Japan
Australia
Italy
India
Awards
- 🥇 Most popular in Cambodia in the Performance Optimization category.
- 🥇 Most popular in Saint Helena in the Performance Optimization category.
- 🥈 Second most popular in Indonesia in the Performance Optimization category.
- 🥈 Second most popular in Austria in the Performance Optimization category.
- 🥈 Second most popular in Uzbekistan in the Performance Optimization category.
- ⭐ 6th most popular in Indonesia in the Performance Optimization category.
- ⭐ 6th most popular in Turkey in the Performance Optimization category.
- ⭐ 6th most popular in Bangladesh in the Performance Optimization category.
- ⭐ 6th most popular in Nepal in the Performance Optimization category.
- ⭐ 6th most popular in Nigeria in the Performance Optimization category.
Popularity by domain category
Determined by the number of sites in each category.
Preload is more popular than Rocket Loader in all market segments.
Business
Online Shopping
Blogs/Wiki
Marketing/Merchandising
Internet Services
Education/Reference
Travel
Entertainment
Health
General News
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
🗃️ About This Data
- We evaluate the popularity of technologies based on the number of websites where we detect their usage.
- Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
- This report is based on the analysis of 3,814,833 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.