7.1 sec in total
284 ms
6.1 sec
659 ms
Click here to check amazing Blackstone Dive Center content. Otherwise, check out these important facts you probably never knew about blackstonedivecenter.com
We offer diving on Tenerife all year round, all over the island. High-quality rental equipment and free transport! Check also our snorkeling offer!
Visit blackstonedivecenter.comWe analyzed Blackstonedivecenter.com page load time and found that the first response time was 284 ms and then it took 6.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 80% of websites can load faster.
blackstonedivecenter.com performance score
name
value
score
weighting
Value7.2 s
1/100
10%
Value24.3 s
0/100
25%
Value25.1 s
0/100
10%
Value3,350 ms
2/100
30%
Value0.052
99/100
15%
Value24.9 s
0/100
10%
284 ms
580 ms
208 ms
405 ms
1457 ms
Our browser made a total of 71 requests to load all elements on the main page. We found that 83% of them (59 requests) were addressed to the original Blackstonedivecenter.com, 7% (5 requests) were made to Youtube.com and 3% (2 requests) were made to . The less responsive or slowest element that took the longest time to load (1.8 sec) belongs to the original domain Blackstonedivecenter.com.
Page size can be reduced by 1.8 MB (27%)
6.8 MB
5.0 MB
In fact, the total size of Blackstonedivecenter.com main page is 6.8 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. 85% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 5.3 MB which makes up the majority of the site volume.
Potential reduce by 129.7 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 129.7 kB or 84% of the original size.
Potential reduce by 1.5 MB
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, Blackstone Dive Center needs image optimization as it can save up to 1.5 MB or 28% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 92.9 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 92.9 kB or 15% of the original size.
Potential reduce by 96.3 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. Blackstonedivecenter.com needs all CSS files to be minified and compressed as it can save up to 96.3 kB or 14% of the original size.
Number of requests can be reduced by 28 (42%)
67
39
The browser has sent 67 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Blackstone Dive Center. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 25 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.
blackstonedivecenter.com
284 ms
www.blackstonedivecenter.com
580 ms
8a6o.css
208 ms
8a6o.css
405 ms
8b5g.css
1457 ms
8a6o.js
894 ms
8b5g.css
378 ms
f12-cf7-captcha-cf7.js
224 ms
index.js
304 ms
index.js
339 ms
swiped-events.min.js
408 ms
imagesloaded.min.js
415 ms
effect.min.js
467 ms
ditty-news-ticker.js
505 ms
swiper.jquery.js
661 ms
jquery.magnific-popup.min.js
540 ms
trx_addons.js
626 ms
__scripts.js
675 ms
mediaelement-and-player.min.js
759 ms
mediaelement-migrate.min.js
735 ms
wp-mediaelement.min.js
766 ms
js_composer_front.min.js
795 ms
vc-waypoints.min.js
851 ms
skrollr.min.js
890 ms
jquery.flexslider.min.js
913 ms
init.min.js
911 ms
Blackstone-Dive-Center-logo-300px.png
180 ms
dummy.png
176 ms
Tenerife-diving-small-map.png
177 ms
Presentation-Dive-Center-300x300.jpg
177 ms
Kerstin-002.jpg
199 ms
SSI-franz.-deu.-span.-engl..jpg
529 ms
Markus-266x400-1.jpg
1325 ms
SSI-deu.-engl..jpg
667 ms
Carlos.jpg
514 ms
SSI-span.-engl..jpg
528 ms
image5.jpeg
841 ms
image0.jpeg
989 ms
image2.jpeg
933 ms
image7.jpeg
779 ms
image3.jpeg
1299 ms
image1.jpeg
950 ms
BDC-logo-170x160v3.png
984 ms
DSD-main.jpg
1061 ms
cert.divers-main.jpg
1066 ms
Become350.jpg
1118 ms
Mares-360.png
1125 ms
Horizontal-Black.png
1546 ms
Professional-Black.png
1354 ms
AquaLung.png
1256 ms
Apeks.png
1255 ms
logo_xs.png
1383 ms
Mares-360-300x134.png
1400 ms
tecline.png
1441 ms
suunto.png
1451 ms
Tripadvisor_Recommended.jpg
1528 ms
sa_C82FcKaQ
178 ms
Footer_BG.jpg
1784 ms
DewXAiKGIjI2Nf5AbGnRwMHAzJBRsZWJ02MTAyaIEYm7mYGDkgLD4GMIvNaRfTAaA0J5DN7rSLwQHCZmZw2ajC2BEYscGhI2Ijc4rLRjUQbxdHAwMji0NHckgESEkkEGzmYWLk0drB+L91A0vvRiYGFwAMdiP0AAA=
70 ms
fontello.svg
1627 ms
dQNL70YmBhcADHYj9AAA
67 ms
trx_addons_icons.svg
1581 ms
www-player.css
6 ms
www-embed-player.js
24 ms
base.js
50 ms
ad_status.js
156 ms
RaBoRo_xCymm2dlJSrwnNMYK_3vPxGMh2bfo3dfd9HE.js
108 ms
embed.js
34 ms
id
24 ms
Create
100 ms
GenerateIT
15 ms
blackstonedivecenter.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
Best practices
These items highlight common accessibility best practices.
Impact
Issue
[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.
blackstonedivecenter.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
Page has valid source maps
blackstonedivecenter.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
Image elements do not have [alt] attributes
Crawling and Indexing
To appear in search results, crawlers need access to your app.
Impact
Issue
Links are not crawlable
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
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Blackstonedivecenter.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 Blackstonedivecenter.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.
blackstonedivecenter.com
Open Graph data is detected on the main page of Blackstone Dive Center. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: