🆚 Preconnect vs. Rocket Loader
- 📈 Preconnect is much more popular than Rocket Loader.
- 🌍 Preconnect is more popular in all countries.
Statistics based on 3.5M+ analyzed websites. About this data
Preconnect
Rocket LoaderType
Performance optimization technology
Performance optimization technology
About
The rel="preconnect" attribute on 
HTML <link> elements instructs browsers to establish early connections to external origins before resources are requested.
It is used to reduce latency by opening DNS lookup, TCP handshake, and TLS negotiation in advance for critical third-party domains such as CDNs, font providers, and analytics services.
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.
Preconnect performance optimization technology is 20 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.
Preconnect is more popular than Rocket Loader in all countries.
United States
United Kingdom
France
Germany
Japan
Spain
Netherlands
Australia
India
Brazil
Awards
- 🥇 Most popular in Thailand in the Performance Optimization category.
- 🥇 Most popular in Korea in the Performance Optimization category.
- 🥇 Most popular in Cyprus in the Performance Optimization category.
- 🥇 Most popular in the British Virgin Islands in the Performance Optimization category.
- 🥇 Most popular in Cambodia 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.
Preconnect is more popular among sites focused on business, online shopping, and marketing and merchandising, while Rocket Loader is more commonly used on travel sites.
Business
Online Shopping
Marketing/Merchandising
Blogs/Wiki
Internet Services
Education/Reference
Entertainment
General News
Health
Sports
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.