Report Summary

  • 42

    Performance

    Renders faster than
    61% of other websites

  • 59

    Accessibility

    Visual factors better than
    that of 26% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 62

    SEO

    Google-friendlier than
    22% of websites

femto.com.ua

Физическая энциклопедия

Page Load Speed

3 sec in total

First Response

433 ms

Resources Loaded

2.4 sec

Page Rendered

206 ms

femto.com.ua screenshot

About Website

Visit femto.com.ua now to see the best up-to-date Femto content for Ukraine and also check out these interesting facts you probably never knew about femto.com.ua

Научно-справочное OnLine издание по физике.

Visit femto.com.ua

Key Findings

We analyzed Femto.com.ua page load time and found that the first response time was 433 ms and then it took 2.6 sec to load all DOM resources and completely render a web page. This is quite a good result, as only 45% of websites can load faster.

Performance Metrics

femto.com.ua performance score

42

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.4 s

72/100

10%

LCP (Largest Contentful Paint)

Value5.7 s

16/100

25%

SI (Speed Index)

Value5.9 s

48/100

10%

TBT (Total Blocking Time)

Value930 ms

30/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value10.8 s

22/100

10%

Network Requests Diagram

femto.com.ua

433 ms

style.css

138 ms

SchListProcessing.js

942 ms

toggle.js

274 ms

show_ads.js

8 ms

Our browser made a total of 57 requests to load all elements on the main page. We found that 37% of them (21 requests) were addressed to the original Femto.com.ua, 18% (10 requests) were made to Google.com and 9% (5 requests) were made to Pagead2.googlesyndication.com. The less responsive or slowest element that took the longest time to load (942 ms) belongs to the original domain Femto.com.ua.

Page Optimization Overview & Recommendations

Page size can be reduced by 41.4 kB (24%)

Content Size

172.1 kB

After Optimization

130.7 kB

In fact, the total size of Femto.com.ua main page is 172.1 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. 50% of websites need less resources to load. Images take 79.7 kB which makes up the majority of the site volume.

HTML Optimization

-70%

Potential reduce by 16.8 kB

  • Original 23.9 kB
  • After minification 23.2 kB
  • After compression 7.1 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 16.8 kB or 70% of the original size.

Image Optimization

-1%

Potential reduce by 918 B

  • Original 79.7 kB
  • After minification 78.7 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. Femto images are well optimized though.

JavaScript Optimization

-30%

Potential reduce by 18.8 kB

  • Original 62.1 kB
  • After minification 61.9 kB
  • After compression 43.3 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 18.8 kB or 30% of the original size.

CSS Optimization

-76%

Potential reduce by 4.9 kB

  • Original 6.5 kB
  • After minification 5.7 kB
  • After compression 1.6 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. Femto.com.ua needs all CSS files to be minified and compressed as it can save up to 4.9 kB or 76% of the original size.

Requests Breakdown

Number of requests can be reduced by 32 (64%)

Requests Now

50

After Optimization

18

The browser has sent 50 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Femto. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 20 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

femto.com.ua accessibility score

59

Accessibility Issues

ARIA

These are opportunities to improve the usage of ARIA in your application which may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

[aria-*] attributes do not match their roles

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

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

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Form elements do not have associated labels

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

femto.com.ua best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

High

Browser errors were logged to the console

SEO Factors

femto.com.ua SEO score

62

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

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

High

Image elements do not have [alt] attributes

Language and Encoding

  • Language Detected

    RU

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Femto.com.ua 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 Femto.com.ua 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.

Social Sharing Optimization

Open Graph description is not detected on the main page of Femto. 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: