2.2 sec in total
523 ms
1.5 sec
211 ms
Welcome to opt-tech.ru homepage info - get ready to check Opt Tech best content for Russia right away, or after learning these important things about opt-tech.ru
Продажа оборудования и материалов для обеспечения объектов системами безопасности и связи: охранно-пожарная сигнализация, системы видео-наблюдения, пожаротушения, контроля и управления доступом, опове...
Visit opt-tech.ruWe analyzed Opt-tech.ru page load time and found that the first response time was 523 ms and then it took 1.7 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 30% of websites can load faster.
opt-tech.ru performance score
name
value
score
weighting
Value4.0 s
22/100
10%
Value4.7 s
31/100
25%
Value7.2 s
29/100
10%
Value10,210 ms
0/100
30%
Value0
100/100
15%
Value17.2 s
4/100
10%
523 ms
124 ms
245 ms
257 ms
255 ms
Our browser made a total of 32 requests to load all elements on the main page. We found that 91% of them (29 requests) were addressed to the original Opt-tech.ru, 6% (2 requests) were made to Counter.yadro.ru and 3% (1 request) were made to Ad.adriver.ru. The less responsive or slowest element that took the longest time to load (608 ms) belongs to the original domain Opt-tech.ru.
Page size can be reduced by 27.2 kB (25%)
108.2 kB
81.0 kB
In fact, the total size of Opt-tech.ru main page is 108.2 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. Only 10% of websites need less resources to load. Images take 72.9 kB which makes up the majority of the site volume.
Potential reduce by 13.1 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 13.1 kB or 73% of the original size.
Potential reduce by 191 B
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. Opt Tech images are well optimized though.
Potential reduce by 4.5 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 4.5 kB or 80% of the original size.
Potential reduce by 9.4 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. Opt-tech.ru needs all CSS files to be minified and compressed as it can save up to 9.4 kB or 79% of the original size.
Number of requests can be reduced by 13 (45%)
29
16
The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Opt Tech. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests and as a result speed up the page load time.
opt-tech.ru
523 ms
style_opt.css
124 ms
checkform.js
245 ms
CSS_A.css
257 ms
autozap.js
255 ms
body_bg.gif
130 ms
print.gif
127 ms
sitemap.gif
123 ms
email.gif
124 ms
menu_bg.gif
245 ms
home.gif
246 ms
postav.png
248 ms
header5.jpg
498 ms
announce.gif
252 ms
announce_image.gif
250 ms
check.gif
365 ms
newsarc.gif
366 ms
sendletter.gif
373 ms
1_new.gif
371 ms
2.gif
374 ms
5.gif
488 ms
4.jpg
487 ms
6.jpg
493 ms
zr.gif
496 ms
search_left.gif
497 ms
submit.gif
608 ms
left_bg.gif
605 ms
hit
259 ms
catalog_bg.gif
591 ms
search_bg.gif
593 ms
hit
135 ms
rle.cgi
273 ms
opt-tech.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.
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
<input type="image"> elements do not have [alt] text
Form elements do not have associated labels
Links do not have a discernible name
opt-tech.ru 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
Serves images with low resolution
General
Impact
Issue
Detected JavaScript libraries
Browser errors were logged to the console
Missing source maps for large first-party JavaScript
opt-tech.ru SEO score
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
N/A
WINDOWS-1251
Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Opt-tech.ru can be misinterpreted by Google and other search engines. Our service has detected that Russian 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 Opt-tech.ru main page’s claimed encoding is windows-1251. 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.
opt-tech.ru
Open Graph description is not detected on the main page of Opt Tech. 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: