Report Summary

  • 88

    Performance

    Renders faster than
    90% of other websites

  • 93

    Accessibility

    Visual factors better than
    that of 82% of websites

  • 0

    Best Practices

  • 86

    SEO

    Google-friendlier than
    60% of websites

serco.co.nz

Serco Group Plc - A Leading Provider of Public Services

Page Load Speed

5.2 sec in total

First Response

391 ms

Resources Loaded

4.3 sec

Page Rendered

477 ms

serco.co.nz screenshot

About Website

Visit serco.co.nz now to see the best up-to-date Serco content and also check out these interesting facts you probably never knew about serco.co.nz

We are a trusted partner of governments, combining people, processes and technology to achieve our purpose of delivering superb public services

Visit serco.co.nz

Key Findings

We analyzed Serco.co.nz page load time and found that the first response time was 391 ms and then it took 4.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 70% of websites can load faster.

Performance Metrics

serco.co.nz performance score

88

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value2.5 s

67/100

10%

LCP (Largest Contentful Paint)

Value2.5 s

89/100

25%

SI (Speed Index)

Value6.0 s

46/100

10%

TBT (Total Blocking Time)

Value0 ms

100/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value2.5 s

98/100

10%

Network Requests Diagram

serco.co.nz

391 ms

www.serco.com

277 ms

www.serco.com

1606 ms

gtm.js

57 ms

d22bc417-4683-4b42-8d6b-cc3af5b95f52.css

21 ms

Our browser made a total of 34 requests to load all elements on the main page. We found that 3% of them (1 request) were addressed to the original Serco.co.nz, 56% (19 requests) were made to Serco.com and 21% (7 requests) were made to Polaris.brighterir.com. The less responsive or slowest element that took the longest time to load (1.8 sec) relates to the external source Serco.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 599.9 kB (10%)

Content Size

5.7 MB

After Optimization

5.1 MB

In fact, the total size of Serco.co.nz main page is 5.7 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. 30% of websites need less resources to load. Images take 5.2 MB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 40.1 kB

  • Original 47.7 kB
  • After minification 30.2 kB
  • After compression 7.5 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. This page needs HTML code to be minified as it can gain 17.5 kB, which is 37% 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 40.1 kB or 84% of the original size.

Image Optimization

-3%

Potential reduce by 172.2 kB

  • Original 5.2 MB
  • After minification 5.0 MB

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. Serco images are well optimized though.

JavaScript Optimization

-68%

Potential reduce by 229.4 kB

  • Original 335.9 kB
  • After minification 308.2 kB
  • After compression 106.5 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 229.4 kB or 68% of the original size.

CSS Optimization

-88%

Potential reduce by 158.2 kB

  • Original 179.8 kB
  • After minification 143.0 kB
  • After compression 21.6 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. Serco.co.nz needs all CSS files to be minified and compressed as it can save up to 158.2 kB or 88% of the original size.

Requests Breakdown

Number of requests can be reduced by 9 (31%)

Requests Now

29

After Optimization

20

The browser has sent 29 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Serco. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and from 6 to 1 for CSS and as a result speed up the page load time.

Accessibility Review

serco.co.nz accessibility score

93

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

SEO Factors

serco.co.nz SEO score

86

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

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

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Serco.co.nz 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 Serco.co.nz 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 Serco. 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: