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optisurf.com screenshot

Report Summary

  • 50

    Performance

    Renders faster than
    68% of other websites

  • 67

    Accessibility

    Visual factors better than
    that of 32% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 54

    SEO

    Google-friendlier than
    19% of websites

optisurf.com

Optical Components and Instruments - Optical Surfaces Limited | Optical Surfaces Limited

Page Load Speed

6.1 sec in total

First Response

1.5 sec

Resources Loaded

4.4 sec

Page Rendered

237 ms

optisurf.com screenshot

About Website

Welcome to optisurf.com homepage info - get ready to check Optisurf best content right away, or after learning these important things about optisurf.com

UK supplier of optical components and instruments incl. flats, spheres, aspherics, paraboloids, toroids, windows, large optics, beam expanders & collimators

Visit optisurf.com

Key Findings

We analyzed Optisurf.com page load time and found that the first response time was 1.5 sec and then it took 4.6 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

optisurf.com performance score

50

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value4.4 s

17/100

10%

LCP (Largest Contentful Paint)

Value5.8 s

15/100

25%

SI (Speed Index)

Value8.6 s

17/100

10%

TBT (Total Blocking Time)

Value220 ms

88/100

30%

CLS (Cumulative Layout Shift)

Value0.154

75/100

15%

TTI (Time to Interactive)

Value6.8 s

55/100

10%

Network Requests Diagram

www.optisurf.com

1459 ms

style.css

96 ms

comment-style.css

182 ms

style.min.css

335 ms

styles.css

256 ms

Our browser made a total of 43 requests to load all elements on the main page. We found that 95% of them (41 requests) were addressed to the original Optisurf.com, 5% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (1.5 sec) belongs to the original domain Optisurf.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 64.1 kB (7%)

Content Size

983.7 kB

After Optimization

919.6 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Optisurf.com main page is 983.7 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. 25% of websites need less resources to load. Images take 822.6 kB which makes up the majority of the site volume.

HTML Optimization

-80%

Potential reduce by 37.9 kB

  • Original 47.6 kB
  • After minification 45.1 kB
  • After compression 9.7 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 37.9 kB or 80% of the original size.

Image Optimization

-1%

Potential reduce by 9.6 kB

  • Original 822.6 kB
  • After minification 813.0 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. Optisurf images are well optimized though.

JavaScript Optimization

-13%

Potential reduce by 11.9 kB

  • Original 90.8 kB
  • After minification 90.8 kB
  • After compression 79.0 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 11.9 kB or 13% of the original size.

CSS Optimization

-21%

Potential reduce by 4.7 kB

  • Original 22.7 kB
  • After minification 22.7 kB
  • After compression 18.0 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. Optisurf.com needs all CSS files to be minified and compressed as it can save up to 4.7 kB or 21% of the original size.

Requests Breakdown

Number of requests can be reduced by 25 (60%)

Requests Now

42

After Optimization

17

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 42 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Optisurf. 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 from 7 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

www.optisurf.com

www.optisurf.com

1459 ms

style.css

style.css

96 ms

comment-style.css

comment-style.css

182 ms

style.min.css

style.min.css

335 ms

styles.css

styles.css

256 ms

basic.css

basic.css

344 ms

shinyblack.css

shinyblack.css

345 ms

jquery.min.js

jquery.min.js

432 ms

jquery-migrate.min.js

jquery-migrate.min.js

268 ms

scroll.js

scroll.js

340 ms

jscript.js

jscript.js

355 ms

comment.js

comment.js

421 ms

style.css

style.css

423 ms

comment-reply.min.js

comment-reply.min.js

426 ms

wp-polyfill.min.js

wp-polyfill.min.js

590 ms

index.js

index.js

457 ms

wp-embed.min.js

wp-embed.min.js

500 ms

smooth.js

smooth.js

584 ms

dim.js

dim.js

508 ms

jquery.touchwipe.js

jquery.touchwipe.js

512 ms

wp-emoji-release.min.js

wp-emoji-release.min.js

315 ms

back1.gif

back1.gif

141 ms

back2.png

back2.png

314 ms

header-image.png

header-image.png

646 ms

side-noside.png

side-noside.png

181 ms

20940B_.jpg

20940B_.jpg

300 ms

OAP-mirrors-x4.jpg

OAP-mirrors-x4.jpg

381 ms

on-axis-parabolic-mirrors.jpg

on-axis-parabolic-mirrors.jpg

391 ms

A1-series-respective-beam-expander.jpg

A1-series-respective-beam-expander.jpg

494 ms

Mirror-mount-LR.jpg

Mirror-mount-LR.jpg

541 ms

fast-focusing-on-axis-parabolic-mirrors-.jpg

fast-focusing-on-axis-parabolic-mirrors-.jpg

603 ms

CUOS-researchers.jpg

CUOS-researchers.jpg

794 ms

bottom-noside.png

bottom-noside.png

592 ms

analytics.js

analytics.js

16 ms

collect

collect

12 ms

wp-polyfill-fetch.min.js

wp-polyfill-fetch.min.js

408 ms

wp-polyfill-dom-rect.min.js

wp-polyfill-dom-rect.min.js

450 ms

wp-polyfill-url.min.js

wp-polyfill-url.min.js

578 ms

wp-polyfill-formdata.min.js

wp-polyfill-formdata.min.js

513 ms

wp-polyfill-element-closest.min.js

wp-polyfill-element-closest.min.js

516 ms

wp-polyfill-object-fit.min.js

wp-polyfill-object-fit.min.js

537 ms

next.png

next.png

92 ms

prev.png

prev.png

168 ms

Accessibility Review

optisurf.com accessibility score

67

Accessibility Issues

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

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

Best Practices

optisurf.com best practices score

75

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

Low

Detected JavaScript libraries

SEO Factors

optisurf.com SEO score

54

Search Engine Optimization Advices

Content Best Practices

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

Impact

Issue

High

Links do not have descriptive text

High

Image elements do not have [alt] attributes

Crawling and Indexing

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

Impact

Issue

High

Links are not crawlable

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 Optisurf.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 Optisurf.com 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

optisurf.com

Open Graph data is detected on the main page of Optisurf. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: