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Desktop speed score of readthedocs.io (76/100) is better than the results of 61.81% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of readthedocs.io (63/100) is better than the results of 9.16% of other sites and means that the page is not mobile-friendly.

Mobile speed score of readthedocs.io (54/100) is better than the results of 41.82% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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readthedocs.io whois

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Domain Name: readthedocs.io
Registry Domain ID: 348a5e0e511740b9bcb9b9a16ed7c180-DONUTS
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readthedocs.io server information

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readthedocs.io desktop page speed rank

Last tested: 2019-09-07

Desktop Speed Medium
76/100

readthedocs.io Desktop Speed Test Quick Summary


priority - 12Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

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Optimize CSS Delivery of the following:

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priority - 10Leverage 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://assets.readthedocs.org/static/core/js/site.73b8dd178721.js (expiration not specified)
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priority - 7Avoid landing page redirects

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priority - 0Minify CSS

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priority - 0Minify HTML

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Minify HTML for the following resources to reduce their size by 827B (11% reduction).

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priority - 0Enable compression

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priority - 0Minify JavaScript

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readthedocs.io Desktop Resource Breakdown

Total Resources28
Number of Hosts6
Static Resources20
JavaScript Resources8
CSS Resources1

readthedocs.io mobile page speed rank

Last tested: 2018-02-26

Mobile Speed Bad
54/100

readthedocs.io Mobile Speed Test Quick Summary


priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 7 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://media.readthedocs.org/static/vendor/jquery.js
https://media.readthedocs.org/static/vendor/jquery-migrate.js
https://media.readthedocs.org/static/vendor/jquery-ui.js
https://media.readthedocs.org/javascript/instantsearch.js
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https://media.readthedocs.org/static/core/js/site.js
https://use.typekit.net/haq4xtp.js

Optimize CSS Delivery of the following:

https://media.readthedocs.org/css/core.css

priority - 26Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

Avoid landing page redirects for the following chain of redirected URLs.

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priority - 17Reduce server response time

priority - 2Leverage 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:

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https://js-agent.newrelic.com/nr-1071.min.js (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 0Minify CSS

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Minifying https://media.readthedocs.org/css/core.css could save 1.7KiB (18% reduction) after compression.

priority - 0Minify JavaScript

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priority - 0Optimize images

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Compressing https://media.readthedocs.org/images/logo.png could save 852B (20% reduction).

readthedocs.io Mobile Resource Breakdown

Total Resources29
Number of Hosts8
Static Resources18
JavaScript Resources10
CSS Resources1

readthedocs.io mobile page usability

Last tested: 2018-02-26

Mobile Usability Bad
63/100

readthedocs.io Mobile Usability Test Quick Summary


priority - 33Use legible font sizes

The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.

The following text fragments have a small font size. Increase the font size to make them more legible.

Create, host,…documentation. renders only 6 pixels tall (16 CSS pixels).

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or renders only 6 pixels tall (16 CSS pixels).

Log in renders only 6 pixels tall (16 CSS pixels).

Read the Docs…docs for you. renders only 8 pixels tall (20 CSS pixels).

Search all the docs and 5 others render only 8 pixels tall (20 CSS pixels).

Whenever you p…r out of sync. and 13 others render only 6 pixels tall (16 CSS pixels).

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priority - 17Size tap targets appropriately

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The tap target <a href="/accounts/signup/" class="reg">Sign up</a> is close to 1 other tap targets.

The tap target <a href="/accounts/login/" class="login">Log in</a> is close to 1 other tap targets.

The tap target <a href="/projects/boot…ap-datepicker/" class="module-item-title">bootstrap-datepicker</a> and 6 others are close to other tap targets.

The tap target <a href="/profiles/acrobat/" class="quiet">(acrobat)</a> and 9 others are close to other tap targets.

The tap target <a href="http://bootstr….io/en/latest/">View Docs</a> and 6 others are close to other tap targets.

The tap target <a href="#">▼</a> and 6 others are close to other tap targets.

The tap target <a href="https://github…eadthedocs.org"></a> and 1 others are close to other tap targets.
The tap target <a href="https://github…eadthedocs.org"></a> and 1 others are close to other tap targets.
The tap target <a href="https://docs.r…test/team.html">Team</a> and 9 others are close to other tap targets.

priority - 10Configure the viewport

Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.

readthedocs.io HTML validation

Errors

Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Line: 213 Column: 7 - 10
"...an> <ul> ..." Line: 250 Column: 7 - 10
"...an> <ul> ..." Line: 287 Column: 7 - 10
"...an> <ul> ..." Line: 331 Column: 7 - 10
"...an> <ul> ..." Line: 412 Column: 7 - 10
"...an> <ul> ..." Line: 470 Column: 7 - 10
"...an> <ul> ..." Line: 514 Column: 7 - 10
"...an> <ul> ..." Line: 549 Column: 7 - 10
"...an> <ul> ..." Line: 586 Column: 7 - 10
"...an> <ul> ..." Line: 687 Column: 7 - 10
"...an> <ul> ..."

Stray start tag “script”.

Line: 895 Column: 1 - 31
"...ytics --> <script type="text/javascript"> va..."

Warnings

Text run is not in Unicode Normalization Form C.

Line: 853 Column: 38 - 62
"...alue="vi">Tiếng Việt [Vietnamese]</opti..."

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Line: 5 Column: 16 - 6
"...TYPE html> <html> <hea..."

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readthedocs.io TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.