2.1 sec in total
664 ms
1.1 sec
305 ms
Visit jelv.is now to see the best up-to-date Jelv content for United States and also check out these interesting facts you probably never knew about jelv.is
Visit jelv.isWe analyzed Jelv.is page load time and found that the first response time was 664 ms and then it took 1.4 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 25% of websites can load faster.
jelv.is performance score
name
value
score
weighting
Value2.6 s
63/100
10%
Value4.8 s
30/100
25%
Value2.6 s
97/100
10%
Value170 ms
92/100
30%
Value0.244
51/100
15%
Value4.1 s
86/100
10%
664 ms
97 ms
117 ms
45 ms
51 ms
Our browser made a total of 23 requests to load all elements on the main page. We found that 65% of them (15 requests) were addressed to the original Jelv.is, 9% (2 requests) were made to Cdn.mathjax.org and 9% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (664 ms) belongs to the original domain Jelv.is.
Page size can be reduced by 193.2 kB (42%)
460.4 kB
267.2 kB
In fact, the total size of Jelv.is main page is 460.4 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. 35% of websites need less resources to load. Javascripts take 258.1 kB which makes up the majority of the site volume.
Potential reduce by 12.4 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 12.4 kB or 72% of the original size.
Potential reduce by 1.5 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. Jelv images are well optimized though.
Potential reduce by 171.2 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 171.2 kB or 66% of the original size.
Potential reduce by 8.0 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. Jelv.is needs all CSS files to be minified and compressed as it can save up to 8.0 kB or 70% of the original size.
Number of requests can be reduced by 7 (37%)
19
12
The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Jelv. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for CSS and as a result speed up the page load time.
jelv.is
664 ms
jquery.js
97 ms
hide.js
117 ms
code-highlighting.js
45 ms
reset.css
51 ms
fonts.css
64 ms
navigation.css
53 ms
header.css
74 ms
main.css
82 ms
syntax.css
124 ms
blog.css
86 ms
MathJax.js
16 ms
css
25 ms
TeX-AMS-MML_HTMLorMML.js
42 ms
ga.js
40 ms
me_with_monkey.jpg
260 ms
valid-xhtml11-blue
109 ms
vcss-blue
108 ms
Junction-webfont.woff
82 ms
aller_rg-webfont.woff
59 ms
aller_bd-webfont.woff
81 ms
__utm.gif
49 ms
88x31.png
36 ms
jelv.is accessibility score
Internationalization and localization
These are opportunities to improve the interpretation of your content by users in different locales.
Impact
Issue
<html> element does not have a [lang] attribute
jelv.is 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
Browser errors were logged to the console
Issues were logged in the Issues panel in Chrome Devtools
jelv.is SEO score
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 Jelv.is 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 Jelv.is 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.
jelv.is
Open Graph description is not detected on the main page of Jelv. 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: