3.8 sec in total
697 ms
3 sec
121 ms
Visit deltabook.ru now to see the best up-to-date Deltabook content for Russia and also check out these interesting facts you probably never knew about deltabook.ru
Интернет-магазин учебников для изучения иностранных языков deltabook.ru (Дельтабук) предлагает купить учебники английского, немецкого, французского, итальянского и испанского языка с доставкой в Москв...
Visit deltabook.ruWe analyzed Deltabook.ru page load time and found that the first response time was 697 ms and then it took 3.1 sec to load all DOM resources and completely render a web page. This is a poor result, as 55% of websites can load faster.
deltabook.ru performance score
name
value
score
weighting
Value5.3 s
7/100
10%
Value6.7 s
7/100
25%
Value9.7 s
10/100
10%
Value2,170 ms
6/100
30%
Value0.006
100/100
15%
Value14.8 s
8/100
10%
697 ms
27 ms
39 ms
50 ms
97 ms
Our browser made a total of 59 requests to load all elements on the main page. We found that 53% of them (31 requests) were addressed to the original Deltabook.ru, 12% (7 requests) were made to Api-maps.yandex.ru and 10% (6 requests) were made to Fonts.gstatic.com. The less responsive or slowest element that took the longest time to load (1 sec) belongs to the original domain Deltabook.ru.
Page size can be reduced by 433.5 kB (58%)
747.1 kB
313.6 kB
In fact, the total size of Deltabook.ru main page is 747.1 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. 45% of websites need less resources to load. HTML takes 228.3 kB which makes up the majority of the site volume.
Potential reduce by 149.5 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 149.5 kB or 65% of the original size.
Potential reduce by 25.9 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, Deltabook needs image optimization as it can save up to 25.9 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.
Potential reduce by 110.3 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 110.3 kB or 65% of the original size.
Potential reduce by 147.8 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. Deltabook.ru needs all CSS files to be minified and compressed as it can save up to 147.8 kB or 85% of the original size.
Number of requests can be reduced by 25 (57%)
44
19
The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Deltabook. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 18 to 1 for JavaScripts and from 9 to 1 for CSS and as a result speed up the page load time.
deltabook.ru
697 ms
css
27 ms
css
39 ms
css
50 ms
owl.carousel.css
97 ms
owl.theme.css
191 ms
main.css
580 ms
jquery-1.9.1.js
949 ms
fastclick.js
295 ms
jquery-ui-1.10.4.custom.min.js
294 ms
owl.carousel.min.js
295 ms
jquery.maskedinput-1.3.1.min.js
322 ms
jquery.autosize.min.js
397 ms
main.js
395 ms
citysearch.js
397 ms
page_713d885b07883c402d61fc07d3d1acb6_3ded718b7b7c42bcdacc191d10c1622e.css
417 ms
kernel_main.css
493 ms
template_f83b873e8891a80d910fee8550303f5f_f68ad15932fc6c86197d6e33856ef14b.css
496 ms
kernel_main.js
1032 ms
template_295e69bec4c1a6be4a28e82c517c1577_23eb65a0124301cc297d4309ef6534b8.js
510 ms
228 ms
watch.js
180 ms
watch.js
448 ms
649 ms
bg-page.jpg
134 ms
img-basket.png
143 ms
c7c46c54f54dbc99032fca03ccca6212.jpeg
143 ms
1fa7a11c895d49c320c4cf243d6b988a.jpeg
128 ms
fa27a9c5682d4c53b9b86ce718313dcf.jpeg
156 ms
8d2e113159b7e7bc77d5c27fc738067e.jpg
207 ms
44f4b22fe835a0af3e25b1ebb30d9941.jpeg
331 ms
06a1093cf143075c2daeda0c9d5a7dc7.jpeg
243 ms
tracking.js
380 ms
sprite.png
438 ms
logo.png
225 ms
btn-dropdown-arrow.png
238 ms
book-shadow-2.png
285 ms
combine.xml
671 ms
advert.gif
87 ms
client.js
264 ms
analytics.js
14 ms
yrzXiAvgeQQdopyG8QSg8Q.woff
15 ms
g46X4VH_KHOWAAa-HpnGPhsxEYwM7FgeyaSgU71cLG0.woff
24 ms
4z2U46_RRLOfkoHsWJG3vz8E0i7KZn-EPnyo3HZu7kw.woff
29 ms
c2KTkZ_oLp2UOMwi4GGs9A.woff
28 ms
nBF2d6Y3AbOwfkBM-9HcWD8E0i7KZn-EPnyo3HZu7kw.woff
29 ms
rouble.woff
274 ms
7dSh6BcuqDLzS2qAASIeuj8E0i7KZn-EPnyo3HZu7kw.woff
29 ms
collect
14 ms
collect
56 ms
ga-audiences
38 ms
1
85 ms
jsonp
191 ms
app3.js
590 ms
ef50ac9e93aaebe3299791c79f277f8e.cur
111 ms
main.class.geoip.php
258 ms
3ce22e999d54bb9ca8150a59207f9d3e.cur
156 ms
4965b66fe115b2f2ed500ece66514d86.cur
265 ms
77492cf358d8b12629399322926c93f2.cur
363 ms
deltabook.ru 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.
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
deltabook.ru 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
RU
RU
UTF-8
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Deltabook.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian is used on the page, and it matches the claimed language. Our system also found out that Deltabook.ru 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.
deltabook.ru
Open Graph description is not detected on the main page of Deltabook. 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: