🆚 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.
Statistics based on 3.5M+ 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
EnterpriseCustom
Categories
Popularity
Determined by the number of sites using each technology.
Preload performance optimization technology is 17 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.
United States
Germany
United Kingdom
France
Netherlands
Spain
Australia
Italy
Japan
India
Awards
- 🥇 Most popular in Saint Helena in the Performance Optimization category.
- 🥇 Most popular in Turkmenistan in the Performance Optimization category.
- 🥈 Second most popular in Germany 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.
- ⭐ 6th most popular in Indonesia in the Performance Optimization category.
- ⭐ 6th most popular in Turkey in the Performance Optimization category.
- ⭐ 6th most popular in Israel 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.
Popularity by domain category
Determined by the number of sites in each category.
Preload is more popular among sites focused on business, online shopping, and marketing and merchandising, while Rocket Loader is more commonly used on games sites.
Business
Online Shopping
Marketing/Merchandising
Blogs/Wiki
Internet Services
Education/Reference
Travel
Entertainment
General News
Health
Top sites
Top-ranked sites that use these technologies.
Compare alternatives
Technologies with similar characteristics.
Speculation Rules
Instant.Page🗃️ 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 3,531,690 websites.
- Statistics were last calculated on .
- For more details, see our methodology and disclaimer.