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spiedigitallibrary.org screenshot

Report Summary

  • 18

    Performance

    Renders faster than
    34% of other websites

  • 91

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    35% of websites

  • 85

    SEO

    Google-friendlier than
    55% of websites

spiedigitallibrary.org

Page Load Speed

14.2 sec in total

First Response

3.4 sec

Resources Loaded

10.5 sec

Page Rendered

322 ms

spiedigitallibrary.org screenshot

About Website

Welcome to spiedigitallibrary.org homepage info - get ready to check Spiedigitallibrary best content for China right away, or after learning these important things about spiedigitallibrary.org

Search the SPIE Digital Library, the world's largest collection of optics and photonics peer-reviewed applied research. Subscriptions and Open Access content available.

Visit spiedigitallibrary.org

Key Findings

We analyzed Spiedigitallibrary.org page load time and found that the first response time was 3.4 sec and then it took 10.8 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

spiedigitallibrary.org performance score

18

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value7.9 s

0/100

10%

LCP (Largest Contentful Paint)

Value9.0 s

1/100

25%

SI (Speed Index)

Value15.2 s

1/100

10%

TBT (Total Blocking Time)

Value2,000 ms

8/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value15.9 s

6/100

10%

Network Requests Diagram

www.spiedigitallibrary.org

3405 ms

MathJax.js

39 ms

gpt.js

101 ms

casa.js

75 ms

dlcss

46 ms

Our browser made a total of 68 requests to load all elements on the main page. We found that 60% of them (41 requests) were addressed to the original Spiedigitallibrary.org, 9% (6 requests) were made to and 6% (4 requests) were made to Securepubads.g.doubleclick.net. The less responsive or slowest element that took the longest time to load (3.4 sec) belongs to the original domain Spiedigitallibrary.org.

Page Optimization Overview & Recommendations

Page size can be reduced by 309.9 kB (28%)

Content Size

1.1 MB

After Optimization

795.8 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Spiedigitallibrary.org main page is 1.1 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 637.3 kB which makes up the majority of the site volume.

HTML Optimization

-79%

Potential reduce by 95.9 kB

  • Original 121.3 kB
  • After minification 109.6 kB
  • After compression 25.4 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 95.9 kB or 79% of the original size.

Image Optimization

-1%

Potential reduce by 1.9 kB

  • Original 258.8 kB
  • After minification 256.9 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. Spiedigitallibrary images are well optimized though.

JavaScript Optimization

-32%

Potential reduce by 203.3 kB

  • Original 637.3 kB
  • After minification 637.3 kB
  • After compression 434.0 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 203.3 kB or 32% of the original size.

CSS Optimization

-10%

Potential reduce by 8.9 kB

  • Original 88.4 kB
  • After minification 88.4 kB
  • After compression 79.5 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. Spiedigitallibrary.org has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 30 (51%)

Requests Now

59

After Optimization

29

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 59 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Spiedigitallibrary. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 22 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

www.spiedigitallibrary.org

www.spiedigitallibrary.org

3405 ms

MathJax.js

MathJax.js

39 ms

gpt.js

gpt.js

101 ms

casa.js

casa.js

75 ms

dlcss

dlcss

46 ms

fonts.css

fonts.css

126 ms

jquery

jquery

71 ms

bootstrap

bootstrap

44 ms

js

js

252 ms

iMAWebCookie.js

iMAWebCookie.js

147 ms

cookieconsent.min.css

cookieconsent.min.css

89 ms

cookieconsent.min.js

cookieconsent.min.js

125 ms

passwordVisibility.js

passwordVisibility.js

187 ms

video

video

264 ms

LoadMore.js

LoadMore.js

227 ms

MML_CHTML.js

MML_CHTML.js

85 ms

_Incapsula_Resource

_Incapsula_Resource

14 ms

pubads_impl.js

pubads_impl.js

27 ms

ppub_config

ppub_config

127 ms

CAA18E558A08B6ED9.css

CAA18E558A08B6ED9.css

84 ms

gtm.js

gtm.js

103 ms

SPIE_Logo_Header.svg

SPIE_Logo_Header.svg

87 ms

SPIE_DL_Logo_Header.svg

SPIE_DL_Logo_Header.svg

31 ms

CC_logo_header.svg

CC_logo_header.svg

98 ms

o-o_top_logo.svg

o-o_top_logo.svg

29 ms

SPIE_DL_Logo_Nav.svg

SPIE_DL_Logo_Nav.svg

88 ms

Conference_Button_HP.png

Conference_Button_HP.png

1152 ms

Search_HP_Icon_Clear.svg

Search_HP_Icon_Clear.svg

86 ms

CircleAnchor.svg

CircleAnchor.svg

268 ms

Test.svg

Test.svg

482 ms

AL-2022.svg

AL-2022.svg

88 ms

MI.svg

MI.svg

186 ms

XR.svg

XR.svg

90 ms

Magnetic_assembly_stimuli-responsive_chiral_superstructures.png

Magnetic_assembly_stimuli-responsive_chiral_superstructures.png

92 ms

Deep_learning-based_method_spinach_health_monitoring.png

Deep_learning-based_method_spinach_health_monitoring.png

93 ms

Peer-reviewer-course-336x235%20%282%29.jpg

Peer-reviewer-course-336x235%20%282%29.jpg

93 ms

Lens.png

Lens.png

94 ms

Editage_300x210pxl_v2.jpg

Editage_300x210pxl_v2.jpg

185 ms

OpenAccessIcon.svg

OpenAccessIcon.svg

267 ms

BackToTop.svg

BackToTop.svg

612 ms

Facebook_Footer.svg

Facebook_Footer.svg

189 ms

Twitter_Footer_X.svg

Twitter_Footer_X.svg

190 ms

LinkedIn_Footer.svg

LinkedIn_Footer.svg

191 ms

SPIE_Logo_Footer.svg

SPIE_Logo_Footer.svg

1097 ms

Float_Nav_SPIE_Logo.svg

Float_Nav_SPIE_Logo.svg

402 ms

cross.png

cross.png

699 ms

Rail_Carrot.svg

Rail_Carrot.svg

589 ms

ads

ads

121 ms

container.html

container.html

107 ms

qrWMTH5+9OlvLdZ7X3wBgchag

qrWMTH5+9OlvLdZ7X3wBgchag

41 ms

uBXbKumYWkoiof6q1jEx+fvTpby3We198AYHIWoA==

uBXbKumYWkoiof6q1jEx+fvTpby3We198AYHIWoA==

41 ms

js

js

97 ms

tealeaf.min.js

tealeaf.min.js

230 ms

boomerang.min.js

boomerang.min.js

303 ms

Search_HP_Icon.svg

Search_HP_Icon.svg

431 ms

6789427960880217234

6789427960880217234

238 ms

abg_lite.js

abg_lite.js

331 ms

window_focus.js

window_focus.js

365 ms

ufs_web_display.js

ufs_web_display.js

237 ms

Video_Play_Button.png

Video_Play_Button.png

532 ms

R2xlRQH

R2xlRQH

11 ms

j00NWhWp4Hef0dsZUUBw==

j00NWhWp4Hef0dsZUUBw==

11 ms

qd+TGu6XJzLwK3qzzXKYeqc+L442CIxHdRkZdbYGaLU7ja73I7tkXbsoSEVVPlx0npf49NDVoVqeB3n9HbGVFAc=

qd+TGu6XJzLwK3qzzXKYeqc+L442CIxHdRkZdbYGaLU7ja73I7tkXbsoSEVVPlx0npf49NDVoVqeB3n9HbGVFAc=

10 ms

R2xlRQH

R2xlRQH

10 ms

insight.min.js

insight.min.js

213 ms

scholar_casa

scholar_casa

509 ms

_Incapsula_Resource

_Incapsula_Resource

154 ms

insight_tag_errors.gif

insight_tag_errors.gif

193 ms

Accessibility Review

spiedigitallibrary.org accessibility score

91

Accessibility Issues

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

Heading elements are not in a sequentially-descending order

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

Best Practices

spiedigitallibrary.org best practices score

75

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

General

Impact

Issue

Low

Detected JavaScript libraries

High

Browser errors were logged to the console

High

Page has valid source maps

SEO Factors

spiedigitallibrary.org SEO score

85

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

    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 Spiedigitallibrary.org 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 Spiedigitallibrary.org 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

spiedigitallibrary.org

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