1.1 sec in total
12 ms
912 ms
171 ms
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Visit rfelab.comWe analyzed Rfelab.com page load time and found that the first response time was 12 ms and then it took 1.1 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 20% of websites can load faster.
rfelab.com performance score
name
value
score
weighting
Value5.1 s
9/100
10%
Value7.6 s
4/100
25%
Value5.8 s
50/100
10%
Value410 ms
67/100
30%
Value0.004
100/100
15%
Value8.3 s
40/100
10%
12 ms
254 ms
30 ms
60 ms
77 ms
Our browser made a total of 56 requests to load all elements on the main page. We found that 5% of them (3 requests) were addressed to the original Rfelab.com, 77% (43 requests) were made to Content.invisioncic.com and 9% (5 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (466 ms) relates to the external source Content.invisioncic.com.
Page size can be reduced by 101.3 kB (12%)
820.7 kB
719.5 kB
In fact, the total size of Rfelab.com main page is 820.7 kB. 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. Images take 333.8 kB which makes up the majority of the site volume.
Potential reduce by 58.1 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 58.1 kB or 83% of the original size.
Potential reduce by 41.5 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. Obviously, Rfelab needs image optimization as it can save up to 41.5 kB or 12% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 197 B
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. This website has mostly compressed JavaScripts.
Potential reduce by 1.5 kB
CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Rfelab.com has all CSS files already compressed.
Number of requests can be reduced by 21 (44%)
48
27
The browser has sent 48 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Rfelab. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 14 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
rfelab.com
12 ms
www.rfelab.com
254 ms
css2
30 ms
341e4a57816af3ba440d891ca87450ff_framework.css.gz
60 ms
05e81b71abe4f22d6eb8d1a929494829_responsive.css.gz
77 ms
90eb5adf50a8c640f633d47fd7eb1778_core.css.gz
80 ms
5a0da001ccc2200dc5625c3f3934497d_core_responsive.css.gz
83 ms
62e269ced0fdab7e30e026f1d30ae516_forums.css.gz
86 ms
76e62c573090645fb99a15a363d8620e_forums_responsive.css.gz
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51a672ecd6862df2c2f1969522683ee9_calendar.css.gz
81 ms
258adbb6e4f3e83cd3b355f84e3fa002_custom.css.gz
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721d19a47b75773db8abe1ed740775e3_RFelements-Horizontal-97x17.png
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Untitled-3.png.1078be68343f32324bf905651c8bbe65.png
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icon1.png.54c8a806c8ebea1aa69700ac10886da7.png
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84c1e40ea0e759e3f1505eb1788ddf3c_default_photo.png
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integr-new.png.03d90fb828c2f1dc23446397c2d90139.png
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root_library.js.gz
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root_js_lang_1.js.gz
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root_framework.js.gz
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global_global_core.js.gz
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root_front.js.gz
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front_front_core.js.gz
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front_front_browse.js.gz
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front_front_forum.js.gz
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front_app.js.gz
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front_front_realtime.js.gz
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root_map.js.gz
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js
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icon-QnA3d.png.e94fb9d4050a79a4f24210be6b4b02af.png
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721d19a47b75773db8abe1ed740775e3_black-header-povodny.png
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UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfMZg.ttf
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UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuI6fMZg.ttf
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fontawesome-webfont.woff
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js
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collect
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rfelab.com accessibility score
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
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
Image elements do not have [alt] attributes
Links do not have a discernible name
rfelab.com best practices score
Trust and Safety
Impact
Issue
Does not use HTTPS
Ensure CSP is effective against XSS attacks
User Experience
Impact
Issue
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
rfelab.com SEO score
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
Content Best Practices
Format your HTML in a way that enables crawlers to better understand your app’s content.
Impact
Issue
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
EN
N/A
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Rfelab.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Rfelab.com main page’s claimed encoding is . Changing it to UTF-8 can be a good choice, as this format is commonly used for encoding all over the web and thus their visitors won’t have any troubles with symbol transcription or reading.
rfelab.com
Open Graph description is not detected on the main page of Rfelab. 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: