udemy.com Udemy Online Courses - Learn Anything, On Your Schedule

Mobile Usability

98/100

Good

Mobile Speed

55/100

Bad

Last tested: 2017-08-27

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udemy.com Mobile Usability: 98/100
udemy.com Mobile Usability Test Quick Overview

Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <span class="hello-title active-link">New student di…48 hours only!</span> is close to 1 other tap targets.
The tap target <li id="slick-slide00" class="slick-active">1</li> and 4 others are close to other tap targets.
The tap target <button type="button">1</button> is close to 3 other tap targets.
The tap target <button type="button">2</button> and 3 others are close to other tap targets.
The tap target <a href="https://about.udemy.com/" class="white-text">About Us</a> and 7 others are close to other tap targets.
The tap target <a id="locale-dropdown" href="javascript:void(0)" class="gray-link dropdown-toggle">English</a> is close to 1 other tap targets.
The tap target <a href="/terms/" class="gray-text">Terms</a> is close to 1 other tap targets.
udemy.com Mobile Speed: 55/100
udemy.com Mobile Speed Test Quick Overview

Optimize images

Properly formatting and compressing images can save many bytes of data.
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Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 4 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
https://www.udemy.com/staticx/udemy/js/webpack/ent…fba6dbcdf34532d398.css
https://www.udemy.com/staticx/udemy/js/webpack/dis…e626aa28c6418310b3.css
https://fonts.googleapis.com/css?family=Open+Sans:…subset=latin,latin-ext
https://www.udemy.com/staticx/udemy/js/webpack/hom…827c8efd4056d6f8f4.css
Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
Only about 65% of the final above-the-fold content could be rendered with the full HTML response.
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://b92.yahoo.co.jp/js/s_retargeting.js (expiration not specified)
https://static.hotjar.com/c/hotjar-298206.js?sv=5 (60 seconds)
https://www.googletagmanager.com/gtm.js?id=GTM-7BF3X (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/1457291081167286?v=2.7.6 (20 minutes)
https://s3.amazonaws.com/ki.js/34436/6GL.js (60 minutes)
https://www.dwin1.com/6554.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
Reduce server response time

Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 1.8KiB (14% reduction).
Minifying https://www.udemy.com/ could save 1.8KiB (14% reduction) after compression.

udemy.com Mobile Resources


Total Resources136
Number of Hosts20
Static Resources106
JavaScript Resources20
CSS Resources4

udemy.com Mobile Resource Breakdown