Openclassrooms.com Site Title

OpenClassrooms, des MOOC et des cours accessibles à tous

Openclassrooms.com Test Results

Openclassrooms.com Mobile Usability: 100/100

Openclassrooms.com Mobile Speed: 63/100

Quick overview:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
https://openclassrooms.com/js/modernizr.js?1c3aa26
Optimize CSS Delivery of the following:
https://openclassrooms.com/bundles/common/css/master.css?1c3aa26
...
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://api.segment.io/v1/p (expiration not specified)
...
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 4.9KiB (53% reduction).
Compressing https://s3-eu-west-1.amazonaws.com/course.oc-static.com/categories/19/14599619144036_dev-mobile.svg could save 1.2KiB (57% reduction).
...
Reduce server response time

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