Access sciencea-z.com. Science A-Z

name

value

score

weighting

FCP (First Contentful Paint)

Value6.0 s

4/100

10%

LCP (Largest Contentful Paint)

Value8.0 s

2/100

25%

SI (Speed Index)

Value6.6 s

37/100

10%

TBT (Total Blocking Time)

Value680 ms

43/100

30%

CLS (Cumulative Layout Shift)

Value0.192

64/100

15%

TTI (Time to Interactive)

Value13.0 s

13/100

10%

sciencea-z.com

806 ms

www.sciencea-z.com

934 ms

jquery-ui--clt_17_08_011-1503948935.css

397 ms

layerslider--clt_17_08_011-1503948935.css

464 ms

jquery-1.9.1.min--clt_17_08_011-1503948935.js

825 ms

Our browser made a total of 73 requests to load all elements on the main page. We found that 93% of them (68 requests) were addressed to the original Sciencea-z.com, 4% (3 requests) were made to Ssl.google-analytics.com and 1% (1 request) were made to Bat.bing.com. The less responsive or slowest element that took the longest time to load (6.8 sec) belongs to the original domain Sciencea-z.com.

Content Size

4.3 MB

After Optimization

1.5 MB

In fact, the total size of Sciencea-z.com main page is 4.3 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. 75% 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. Javascripts take 1.8 MB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 83.6 kB

Original 104.5 kB
After minification 88.8 kB
After compression 20.9 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. This page needs HTML code to be minified as it can gain 15.7 kB, which is 15% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 83.6 kB or 80% of the original size.

Image Optimization

-10%

Potential reduce by 102.9 kB

Original 1.1 MB
After minification 957.8 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. Science A Z images are well optimized though.

JavaScript Optimization

-74%

Potential reduce by 1.3 MB

Original 1.8 MB
After minification 1.6 MB
After compression 460.7 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 1.3 MB or 74% of the original size.

CSS Optimization

-93%

Potential reduce by 1.2 MB

Original 1.3 MB
After minification 432.5 kB
After compression 88.2 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. Sciencea-z.com needs all CSS files to be minified and compressed as it can save up to 1.2 MB or 93% of the original size.

Requests Now

After Optimization

The browser has sent 62 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Science A Z. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 30 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Issues

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.

High

ARIA IDs are not unique

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

High

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

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.

High

Links do not have a discernible name

Areas of Improvement

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

High

Serves images with low resolution

Low

Detected JavaScript libraries

High

Missing source maps for large first-party JavaScript

Search Engine Optimization Advices

Format your HTML in a way that enables crawlers to better understand your app’s content.

High

Links do not have descriptive text

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

High

Links are not crawlable

Language and Encoding

Language Detected

EN
Language Claimed

N/A
Encoding

ISO-8859-1

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Sciencea-z.com can be misinterpreted by Google and other search engines. Our service has detected that English 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 Sciencea-z.com main page’s claimed encoding is iso-8859-1. 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.

Social Sharing Optimization

sciencea-z.com

Open Graph description is not detected on the main page of Science A Z. 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:

Report Summary

Performance

Accessibility

Best Practices

SEO

Science A-Z

Page Load Speed

First Response

Resources Loaded

Page Rendered

About Website

Key Findings

Performance Metrics

Measured Metrics

FCP (First Contentful Paint)

LCP (Largest Contentful Paint)

SI (Speed Index)

TBT (Total Blocking Time)

CLS (Cumulative Layout Shift)

TTI (Time to Interactive)

Network Requests Diagram

sciencea-z.com

www.sciencea-z.com

jquery-ui--clt_17_08_011-1503948935.css

layerslider--clt_17_08_011-1503948935.css

jquery-1.9.1.min--clt_17_08_011-1503948935.js

Page Optimization Overview & Recommendations

Content Size

After Optimization

HTML Optimization

Image Optimization

JavaScript Optimization

CSS Optimization

Requests Breakdown

Requests Now

After Optimization

Network Requests Diagram

sciencea-z.com

www.sciencea-z.com

jquery-ui--clt_17_08_011-1503948935.css

layerslider--clt_17_08_011-1503948935.css

jquery-1.9.1.min--clt_17_08_011-1503948935.js

jquery-ui.min--clt_17_08_011-1503948935.js

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jquery.accordion-1.2.2.source.js

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builder.js

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dragdrop.js

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slider.js

sound.js

ga.js

bat.js

bg-bundlebar-clouds.png

logo-learninga-z.svg

logo-sciencea-z.svg

sciencea-z-video.jpg

home-slide01.png