1.5 sec in total
64 ms
1.3 sec
151 ms
Click here to check amazing Learn C content for United States. Otherwise, check out these important facts you probably never knew about learn-c.org
learn-c.org is a free interactive C tutorial for people who want to learn C, fast.
Visit learn-c.orgWe analyzed Learn-c.org page load time and found that the first response time was 64 ms and then it took 1.5 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.
learn-c.org performance score
name
value
score
weighting
Value1.4 s
97/100
10%
Value2.0 s
97/100
25%
Value6.2 s
43/100
10%
Value3,630 ms
1/100
30%
Value0.419
23/100
15%
Value11.1 s
20/100
10%
64 ms
9 ms
15 ms
32 ms
28 ms
Our browser made a total of 79 requests to load all elements on the main page. We found that 34% of them (27 requests) were addressed to the original Learn-c.org, 9% (7 requests) were made to Apis.google.com and 6% (5 requests) were made to Tpc.googlesyndication.com. The less responsive or slowest element that took the longest time to load (583 ms) relates to the external source Spoj.com.
Page size can be reduced by 679.4 kB (62%)
1.1 MB
416.6 kB
In fact, the total size of Learn-c.org main page is 1.1 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 70% of websites need less resources to load. Javascripts take 980.3 kB which makes up the majority of the site volume.
Potential reduce by 57.9 kB
HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 57.9 kB or 71% of the original size.
Potential reduce by 3.6 kB
Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Learn C images are well optimized though.
Potential reduce by 617.9 kB
It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 617.9 kB or 63% of the original size.
Number of requests can be reduced by 54 (70%)
77
23
The browser has sent 77 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Learn C. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 42 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
learn-c.org
64 ms
codemirror.css
9 ms
monokai.css
15 ms
bootstrap.min.css
32 ms
bootstrap-responsive.css
28 ms
learnpython.css
13 ms
jquery.min.js
46 ms
addthis_widget.js
22 ms
show_ads.js
19 ms
banner.js
583 ms
fpi.js
17 ms
codemirror.js
89 ms
matchbrackets.js
90 ms
clike.js
90 ms
python.js
29 ms
perl.js
86 ms
php.js
84 ms
javascript.js
91 ms
ruby.js
84 ms
shell.js
86 ms
bootstrap.min.js
87 ms
bootbox.min.js
87 ms
learnpython.js
86 ms
getheadertagforsite
53 ms
zrt_lookup.html
40 ms
show_ads_impl.js
44 ms
learn-c.png
20 ms
de.png
123 ms
en.png
21 ms
pl.png
29 ms
digital-ocean.png
34 ms
dmca_protected_sml_120ad.png
29 ms
ads
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ads
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gpt.js
21 ms
osd.js
30 ms
pubads_impl_81.js
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container.html
7 ms
ads
276 ms
sync
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glyphicons-halflings-white.png
77 ms
se-logo-anim.gif
77 ms
ga.js
55 ms
300lo.json
37 ms
all.js&version=v2.0
153 ms
widgets.js
30 ms
plusone.js
91 ms
counter.8eb9e83b9fa0d4af1e4f.js
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adcfg
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sh.7c7179124ea24ac6ba46caac.html
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__utm.gif
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addelivery
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button.831500944bc3eb7ea5276ccdc3f71d2e.js
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shares.json
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cb=gapi.loaded_0
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cb=gapi.loaded_1
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fastbutton
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tweet_button.6a78875565a912489e9aef879c881358.en.html
16 ms
postmessageRelay
59 ms
m_js_controller.js
35 ms
abg.js
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169 ms
cb=gapi.loaded_0
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cb=gapi.loaded_1
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jstag
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xd_arbiter.php
101 ms
xd_arbiter.php
139 ms
img
54 ms
api.js
94 ms
core:rpc:shindig.random:shindig.sha1.js
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2536007149-postmessagerelay.js
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favicon
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googlelogo_color_112x36dp.png
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nessie_icon_tiamat_white.png
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1
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x_button_blue2.png
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jot
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7-1I540iwtLQZRDhQUP9L-vt70m6ZeYTcveWqB03r34.js
7 ms
learn-c.org accessibility score
ARIA
These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
[aria-*] attributes do not match their roles
Names and labels
These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.
Impact
Issue
Buttons do not have an accessible name
<frame> or <iframe> elements do not have a title
Image elements do not have [alt] attributes
Contrast
These are opportunities to improve the legibility of your content.
Impact
Issue
Background and foreground colors do not have a sufficient contrast ratio.
Navigation
These are opportunities to improve keyboard navigation in your application.
Impact
Issue
Heading elements are not in a sequentially-descending order
learn-c.org best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Includes front-end JavaScript libraries with known security vulnerabilities
Ensure CSP is effective against XSS attacks
General
Impact
Issue
Detected JavaScript libraries
Page has valid source maps
learn-c.org SEO score
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
Links do not have descriptive text
Image elements do not have [alt] attributes
Mobile Friendly
Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).
Impact
Issue
Document uses legible font sizes
Tap targets are not sized appropriately
EN
N/A
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Learn-c.org can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Learn-c.org main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.
learn-c.org
Open Graph description is not detected on the main page of Learn C. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: