1.1 sec in total
251 ms
716 ms
133 ms
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Visit essilorlabs.comWe analyzed Essilorlabs.com page load time and found that the first response time was 251 ms and then it took 849 ms to load all DOM resources and completely render a web page. This is quite a good result, as only 15% of websites can load faster. This domain responded with an error, which can significantly jeopardize Essilorlabs.com rating and web reputation
essilorlabs.com performance score
name
value
score
weighting
Value7.8 s
0/100
10%
Value18.8 s
0/100
25%
Value10.0 s
9/100
10%
Value880 ms
32/100
30%
Value0.003
100/100
15%
Value25.3 s
0/100
10%
251 ms
49 ms
42 ms
38 ms
94 ms
Our browser made a total of 31 requests to load all elements on the main page. We found that 81% of them (25 requests) were addressed to the original Essilorlabs.com, 6% (2 requests) were made to Maps.googleapis.com and 6% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (251 ms) belongs to the original domain Essilorlabs.com.
Page size can be reduced by 147.9 kB (32%)
455.7 kB
307.8 kB
In fact, the total size of Essilorlabs.com main page is 455.7 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. 20% of websites need less resources to load. Javascripts take 215.2 kB which makes up the majority of the site volume.
Potential reduce by 6.2 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 6.2 kB or 67% of the original size.
Potential reduce by 8.8 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. Essilorlabs images are well optimized though.
Potential reduce by 91.3 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 91.3 kB or 42% of the original size.
Potential reduce by 41.7 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. Essilorlabs.com needs all CSS files to be minified and compressed as it can save up to 41.7 kB or 58% of the original size.
Number of requests can be reduced by 13 (50%)
26
13
The browser has sent 26 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Essilorlabs. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 10 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
essilorlabs.com
251 ms
master.css
49 ms
jquery.min.js
42 ms
html5.js
38 ms
scripts.js
94 ms
placeholder.js
98 ms
js
56 ms
js
79 ms
WebResource.axd
131 ms
jquery-1.11.1.js
227 ms
script.js
88 ms
global.css
90 ms
layout.css
95 ms
tables.css
91 ms
util.css
99 ms
ga.js
57 ms
logo.gif
66 ms
labs_logo.png
65 ms
col_why.jpg
107 ms
col_challenge.jpg
99 ms
col_calc.jpg
68 ms
video_channel2.jpg
66 ms
youtube_slider.jpg
143 ms
__utm.gif
45 ms
caret.png
48 ms
col_arrow.png
55 ms
login_panel.gif
53 ms
ajax_alpha.png
83 ms
avantgarde_demibt-webfont.woff
90 ms
avantgarde_demibt-webfont.ttf
48 ms
avantgarde_demibt-webfont.svg
46 ms
essilorlabs.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
Links do not have a discernible name
essilorlabs.com 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
User Experience
Impact
Issue
Displays images with incorrect aspect ratio
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
essilorlabs.com 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
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
robots.txt is not valid
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
EN
EN
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Essilorlabs.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 Essilorlabs.com 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.
essilorlabs.com
Open Graph description is not detected on the main page of Essilorlabs. 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: