Report Summary

  • 40

    Performance

    Renders faster than
    60% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 39% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

cenlib.tau.ac.il

הספרייה המרכזית ע"ש סוראסקי | אוניברסיטת ת"א

Page Load Speed

5.3 sec in total

First Response

877 ms

Resources Loaded

4.2 sec

Page Rendered

235 ms

cenlib.tau.ac.il screenshot

About Website

Click here to check amazing Cenlib Tau content for Israel. Otherwise, check out these important facts you probably never knew about cenlib.tau.ac.il

Visit cenlib.tau.ac.il

Key Findings

We analyzed Cenlib.tau.ac.il page load time and found that the first response time was 877 ms and then it took 4.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 65% of websites can load faster.

Performance Metrics

cenlib.tau.ac.il performance score

40

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.3 s

17/100

10%

LCP (Largest Contentful Paint)

Value4.3 s

41/100

25%

SI (Speed Index)

Value10.8 s

6/100

10%

TBT (Total Blocking Time)

Value880 ms

32/100

30%

CLS (Cumulative Layout Shift)

Value0.011

100/100

15%

TTI (Time to Interactive)

Value9.2 s

32/100

10%

Network Requests Diagram

cenlib.tau.ac.il

877 ms

css_R-slMEj6rJBamqClUE8NGYB_qxwBfAW582ITDGL3RBQ.css

165 ms

css_uBiBA-s4SVypptYBOVJMesxoNyIyZNXPcNLF1DtYAr4.css

493 ms

css_Kthftwwj4UaWnOhOz--M1C9jM_fdsJqD0_BQvvD0ZAI.css

659 ms

css_PzDHtBQJmhz5-7eR7_dpyI18E2aXoyVaC-oomb3Re2s.css

509 ms

Our browser made a total of 74 requests to load all elements on the main page. We found that 73% of them (54 requests) were addressed to the original Cenlib.tau.ac.il, 7% (5 requests) were made to My.nanorep.com and 4% (3 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.4 sec) belongs to the original domain Cenlib.tau.ac.il.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.0 MB (61%)

Content Size

1.7 MB

After Optimization

648.8 kB

In fact, the total size of Cenlib.tau.ac.il main page is 1.7 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. 70% of websites need less resources to load. Javascripts take 791.2 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 80.6 kB

  • Original 102.4 kB
  • After minification 99.6 kB
  • After compression 21.9 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. 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 80.6 kB or 79% of the original size.

Image Optimization

-4%

Potential reduce by 17.6 kB

  • Original 415.6 kB
  • After minification 398.0 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. Cenlib Tau images are well optimized though.

JavaScript Optimization

-79%

Potential reduce by 625.0 kB

  • Original 791.2 kB
  • After minification 573.3 kB
  • After compression 166.2 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 625.0 kB or 79% of the original size.

CSS Optimization

-83%

Potential reduce by 309.8 kB

  • Original 372.6 kB
  • After minification 362.4 kB
  • After compression 62.8 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. Cenlib.tau.ac.il needs all CSS files to be minified and compressed as it can save up to 309.8 kB or 83% of the original size.

Requests Breakdown

Number of requests can be reduced by 38 (54%)

Requests Now

71

After Optimization

33

The browser has sent 71 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Cenlib Tau. 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 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

cenlib.tau.ac.il accessibility score

73

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

button, link, and menuitem elements do not have accessible names.

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

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Tables and lists

These are opportunities to improve the experience of reading tabular or list data using assistive technology, like a screen reader.

Impact

Issue

High

Lists do not contain only <li> elements and script supporting elements (<script> and <template>).

High

List items (<li>) are not contained within <ul> or <ol> parent elements.

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

cenlib.tau.ac.il best practices score

67

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

User Experience

Impact

Issue

High

Serves images with low resolution

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

cenlib.tau.ac.il SEO score

79

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

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

High

Document uses legible font sizes

Language and Encoding

  • Language Detected

    IW

  • Language Claimed

    HE

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Cenlib.tau.ac.il can be misinterpreted by Google and other search engines. Our service has detected that Hebrew is used on the page, and it does not match the claimed language. Our system also found out that Cenlib.tau.ac.il 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 Cenlib Tau. 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: