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developer.dolby.com screenshot

Report Summary

  • 12

    Performance

    Renders faster than
    25% of other websites

  • 73

    Accessibility

    Visual factors better than
    that of 38% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    55% of websites

  • 79

    SEO

    Google-friendlier than
    40% of websites

developer.dolby.com

High Quality Live Streaming & Playback | Dolby OptiView

Page Load Speed

3.5 sec in total

First Response

132 ms

Resources Loaded

2.3 sec

Page Rendered

1.1 sec

developer.dolby.com screenshot

About Website

Visit developer.dolby.com now to see the best up-to-date Developer Dolby content for China and also check out these interesting facts you probably never knew about developer.dolby.com

Dolby OptiView enables you to deliver next-level streams with real-time engagement, seamless ad integration, & cross-platform consistency.

Visit developer.dolby.com

Key Findings

We analyzed Developer.dolby.com page load time and found that the first response time was 132 ms and then it took 3.4 sec to load all DOM resources and completely render a web page. This is a poor result, as 60% of websites can load faster.

Performance Metrics

developer.dolby.com performance score

12

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value5.1 s

9/100

10%

LCP (Largest Contentful Paint)

Value8.7 s

1/100

25%

SI (Speed Index)

Value11.7 s

4/100

10%

TBT (Total Blocking Time)

Value3,490 ms

1/100

30%

CLS (Cumulative Layout Shift)

Value0.183

66/100

15%

TTI (Time to Interactive)

Value25.3 s

0/100

10%

Network Requests Diagram

developer.dolby.com

132 ms

developer.dolby.com

367 ms

dolby.io

449 ms

gtm.js

149 ms

21501632993.js

70 ms

Our browser made a total of 158 requests to load all elements on the main page. We found that 1% of them (2 requests) were addressed to the original Developer.dolby.com, 80% (126 requests) were made to Dolby.io and 4% (7 requests) were made to Cdn.cookielaw.org. The less responsive or slowest element that took the longest time to load (559 ms) relates to the external source Dolby.io.

Page Optimization Overview & Recommendations

Page size can be reduced by 1.5 MB (30%)

Content Size

5.2 MB

After Optimization

3.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Developer.dolby.com main page is 5.2 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. Only a small number of websites need less resources to load. Images take 2.8 MB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 214.6 kB

  • Original 258.2 kB
  • After minification 252.3 kB
  • After compression 43.5 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. 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 214.6 kB or 83% of the original size.

Image Optimization

-0%

Potential reduce by 739 B

  • Original 2.8 MB
  • After minification 2.8 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. Developer Dolby images are well optimized though.

JavaScript Optimization

-61%

Potential reduce by 1.0 MB

  • Original 1.7 MB
  • After minification 1.7 MB
  • After compression 672.2 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 1.0 MB or 61% of the original size.

CSS Optimization

-70%

Potential reduce by 292.9 kB

  • Original 416.2 kB
  • After minification 414.2 kB
  • After compression 123.3 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. Developer.dolby.com needs all CSS files to be minified and compressed as it can save up to 292.9 kB or 70% of the original size.

Requests Breakdown

Number of requests can be reduced by 79 (53%)

Requests Now

148

After Optimization

69

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 148 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Developer Dolby. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 36 to 1 for JavaScripts and from 31 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

developer.dolby.com

developer.dolby.com

132 ms

developer.dolby.com

developer.dolby.com

367 ms

dolby.io

dolby.io

449 ms

gtm.js

gtm.js

149 ms

21501632993.js

21501632993.js

70 ms

otSDKStub.js

otSDKStub.js

125 ms

style.min.css

style.min.css

54 ms

styles-blocks.css

styles-blocks.css

54 ms

blocks.style.build.css

blocks.style.build.css

54 ms

index.css

index.css

58 ms

copy-the-code.css

copy-the-code.css

53 ms

copy-inline.css

copy-inline.css

57 ms

dolby-notification-bar.css

dolby-notification-bar.css

138 ms

socialsnap.css

socialsnap.css

122 ms

svgs-attachment.css

svgs-attachment.css

120 ms

style.css

style.css

122 ms

blocks_elements.css

blocks_elements.css

136 ms

wg-custom.css

wg-custom.css

141 ms

main.min.css

main.min.css

141 ms

style.css

style.css

138 ms

shiftnav.min.css

shiftnav.min.css

142 ms

style-global.css

style-global.css

155 ms

ubermenu.min.css

ubermenu.min.css

145 ms

blackwhite.css

blackwhite.css

148 ms

blackwhite2.css

blackwhite2.css

148 ms

all.min.css

all.min.css

150 ms

style-77.css

style-77.css

149 ms

navigation-branding-flex.min.css

navigation-branding-flex.min.css

154 ms

font-awesome.min.css

font-awesome.min.css

173 ms

jquery.min.js

jquery.min.js

179 ms

jquery-migrate.min.js

jquery-migrate.min.js

172 ms

general.js

general.js

171 ms

api_use_case.css

api_use_case.css

162 ms

slick.css

slick.css

51 ms

blog_carousel.css

blog_carousel.css

163 ms

cta_block.css

cta_block.css

166 ms

sticky.min.js

sticky.min.js

166 ms

mpp-frontend.js

mpp-frontend.js

167 ms

accordion-blocks.min.js

accordion-blocks.min.js

167 ms

copy-the-code.js

copy-the-code.js

171 ms

clipboard.js

clipboard.js

171 ms

copy-inline.js

copy-inline.js

171 ms

14544730.js

14544730.js

129 ms

slick.min.js

slick.min.js

105 ms

v2.js

v2.js

136 ms

dolby-notification-bar.js

dolby-notification-bar.js

453 ms

smooth-scroll.min.js

smooth-scroll.min.js

133 ms

socialsnap.js

socialsnap.js

133 ms

menu.min.js

menu.min.js

150 ms

ubermenu.min.js

ubermenu.min.js

154 ms

ubermenu.sticky.min.js

ubermenu.sticky.min.js

144 ms

shiftnav.min.js

shiftnav.min.js

299 ms

api_use_case.js

api_use_case.js

78 ms

isotope.min.js

isotope.min.js

235 ms

2623e6be-a348-4a34-afe8-14b1b862d3ee.json

2623e6be-a348-4a34-afe8-14b1b862d3ee.json

55 ms

blog_carousel.js

blog_carousel.js

222 ms

location

location

177 ms

940940766

940940766

361 ms

viewer.millicast.com

viewer.millicast.com

196 ms

f3a5be458aa22c8a62e8ca1aab36e9ab

f3a5be458aa22c8a62e8ca1aab36e9ab

167 ms

notification-bar-close.svg

notification-bar-close.svg

152 ms

2020_DolbyIO_Horiz_White.svg

2020_DolbyIO_Horiz_White.svg

153 ms

fan-engagement-icon-black-lt-bg.svg

fan-engagement-icon-black-lt-bg.svg

154 ms

dio-icon-igaming-black.svg

dio-icon-igaming-black.svg

161 ms

DLB_IO_Icon_Soltn_SportsBetting_LTE.svg

DLB_IO_Icon_Soltn_SportsBetting_LTE.svg

155 ms

horse-race-icon-black.svg

horse-race-icon-black.svg

162 ms

DLB_IO_Icon_Soltn_Auctions_rgb_LTE.svg

DLB_IO_Icon_Soltn_Auctions_rgb_LTE.svg

163 ms

DLB_IO_Icon_Soltn_Evnts_rgb_LTE.svg

DLB_IO_Icon_Soltn_Evnts_rgb_LTE.svg

164 ms

DLB_IO_Icon_Soltn_VirtualWorlds_rgb_LTE.svg

DLB_IO_Icon_Soltn_VirtualWorlds_rgb_LTE.svg

181 ms

DLB_IO_Icon_RemoteProduction_LTE.svg

DLB_IO_Icon_RemoteProduction_LTE.svg

184 ms

DLB_IO_Icon_CustomerStories_rgb_LTE.svg

DLB_IO_Icon_CustomerStories_rgb_LTE.svg

187 ms

dolbyio-icon-blog-dark-bg.svg

dolbyio-icon-blog-dark-bg.svg

182 ms

dolbyio-icon-documentation-dark-bg.svg

dolbyio-icon-documentation-dark-bg.svg

193 ms

RealTimeStreaming-black.svg

RealTimeStreaming-black.svg

335 ms

RemoteMultivewer-blck.svg

RemoteMultivewer-blck.svg

204 ms

dolbyio-logo-wh.png

dolbyio-logo-wh.png

205 ms

DolbyIO-Social-Preview-Image.png

DolbyIO-Social-Preview-Image.png

214 ms

gradient-bg20-4-2023-fix.jpg

gradient-bg20-4-2023-fix.jpg

201 ms

arrow_static_link_white.svg

arrow_static_link_white.svg

333 ms

dolbyio-streaming-massive-audiences-1.png

dolbyio-streaming-massive-audiences-1.png

338 ms

fan-engagement-lt-bg.svg

fan-engagement-lt-bg.svg

335 ms

dio_igaming-live-casino-icon-dk-bg-elevated.svg

dio_igaming-live-casino-icon-dk-bg-elevated.svg

336 ms

dio_live-sports-icon-dk-bg-elevated.svg

dio_live-sports-icon-dk-bg-elevated.svg

333 ms

dolby-live-horse-race-betting-icon-elevated-dk-bg.svg

dolby-live-horse-race-betting-icon-elevated-dk-bg.svg

345 ms

393333566553Scroll_Down_4.gif

393333566553Scroll_Down_4.gif

348 ms

DLB_IO_Icon_FeatBen_HDVideo_rgb_DRK.svg

DLB_IO_Icon_FeatBen_HDVideo_rgb_DRK.svg

454 ms

icon-benefit-latency-white.svg

icon-benefit-latency-white.svg

346 ms

icon-benefit-affordability-white.svg

icon-benefit-affordability-white.svg

345 ms

DLB_IO_Icon_FeatBen_ServiceLevelGuarantee_DRK.svg

DLB_IO_Icon_FeatBen_ServiceLevelGuarantee_DRK.svg

455 ms

icon-benefit-reach-white.svg

icon-benefit-reach-white.svg

456 ms

icon-support-dark-dolbyio.svg

icon-support-dark-dolbyio.svg

457 ms

gradient-background.png

gradient-background.png

465 ms

a21501632993.html

a21501632993.html

184 ms

icon-benefit-latency-white.svg

icon-benefit-latency-white.svg

357 ms

icon-support-dark-dolbyio.svg

icon-support-dark-dolbyio.svg

399 ms

otBannerSdk.js

otBannerSdk.js

58 ms

icon-benefit-affordability-white.svg

icon-benefit-affordability-white.svg

438 ms

2a1d06fe-73d7-4df1-9d59-5227c3c01d03.woff

2a1d06fe-73d7-4df1-9d59-5227c3c01d03.woff

353 ms

7667f1c1-c3ca-4520-aead-66f9d93d55a0.woff

7667f1c1-c3ca-4520-aead-66f9d93d55a0.woff

464 ms

fa-brands-400.woff

fa-brands-400.woff

392 ms

icon-derisk-investment-white-dk-bg-2.svg

icon-derisk-investment-white-dk-bg-2.svg

387 ms

nfl-logo-white-1.png

nfl-logo-white-1.png

380 ms

nbc-logo-white.png

nbc-logo-white.png

426 ms

cbs-logo-white-.png

cbs-logo-white-.png

387 ms

en.json

en.json

26 ms

nasa-logo-white.png

nasa-logo-white.png

374 ms

css2

css2

165 ms

chunk-vendors.6181fa6b.css

chunk-vendors.6181fa6b.css

64 ms

app.21f2fe7a.css

app.21f2fe7a.css

36 ms

chunk-vendors.e1f8ad51.js

chunk-vendors.e1f8ad51.js

290 ms

app.45cdf69c.js

app.45cdf69c.js

170 ms

prime-video-logo-white.png

prime-video-logo-white.png

366 ms

Playgon-logo-white-@2x.png

Playgon-logo-white-@2x.png

366 ms

SoundCloud-logo-white-horiz-@2x.png

SoundCloud-logo-white-horiz-@2x.png

407 ms

Crazy-Claw-logo-white-@2x.png

Crazy-Claw-logo-white-@2x.png

361 ms

Livespin-logo-white-@2x.png

Livespin-logo-white-@2x.png

394 ms

roots-logo.png

roots-logo.png

386 ms

logo-5thkind-dolby.io_.png

logo-5thkind-dolby.io_.png

384 ms

DolbyIO-Icon-DolbyDifference-DRK.svg

DolbyIO-Icon-DolbyDifference-DRK.svg

380 ms

fb.js

fb.js

327 ms

web-interactives-embed.js

web-interactives-embed.js

324 ms

14544730.js

14544730.js

329 ms

banner.js

banner.js

324 ms

Dolby.io_blog-art_1088x450_top-3-health-metric.jpg

Dolby.io_blog-art_1088x450_top-3-health-metric.jpg

352 ms

rosepower-600x600-1.jpg

rosepower-600x600-1.jpg

338 ms

otFlat.json

otFlat.json

195 ms

otPcCenter.json

otPcCenter.json

201 ms

otCommonStyles.css

otCommonStyles.css

241 ms

dolbyio-future-igaming.jpg

dolbyio-future-igaming.jpg

258 ms

dolbyIO_real-time-engagement-trivia-show.jpg

dolbyIO_real-time-engagement-trivia-show.jpg

260 ms

amy-gehling-2.jpg

amy-gehling-2.jpg

258 ms

Dolby.io-Revolutionizing-Microbetting-in-Sports-with-Real-Time-Streaming-Purple-BG-1088x450-1.jpg

Dolby.io-Revolutionizing-Microbetting-in-Sports-with-Real-Time-Streaming-Purple-BG-1088x450-1.jpg

330 ms

Capture-decran-2023-06-20-a-8.21.28-AM.png

Capture-decran-2023-06-20-a-8.21.28-AM.png

276 ms

Ryan-Jespersen-96x96.jpeg

Ryan-Jespersen-96x96.jpeg

271 ms

cta_default_background.jpg

cta_default_background.jpg

266 ms

dolby-logo-icon.png

dolby-logo-icon.png

266 ms

ISO-IEC-27001-2022-005.png

ISO-IEC-27001-2022-005.png

265 ms

x-twitter.png

x-twitter.png

268 ms

fontawesome-webfont.woff

fontawesome-webfont.woff

211 ms

fa-solid-900.woff

fa-solid-900.woff

211 ms

fa-regular-400.woff

fa-regular-400.woff

559 ms

logo-dolby-footer.png

logo-dolby-footer.png

209 ms

fan-engagement-icon-white-dk-bg.svg

fan-engagement-icon-white-dk-bg.svg

210 ms

dio-igaming-white.svg

dio-igaming-white.svg

200 ms

DLB_IO_Icon_Soltn_SportsBetting_DRK.svg

DLB_IO_Icon_Soltn_SportsBetting_DRK.svg

169 ms

horse-race-icon-white.svg

horse-race-icon-white.svg

138 ms

DLB_IO_Icon_Soltn_Auctions_rgb_DRK.svg

DLB_IO_Icon_Soltn_Auctions_rgb_DRK.svg

132 ms

DLB_IO_Icon_Soltn_Evnts_rgb_DRK.svg

DLB_IO_Icon_Soltn_Evnts_rgb_DRK.svg

132 ms

dio-game-engines-white.svg

dio-game-engines-white.svg

133 ms

api.js

api.js

43 ms

DLB_IO_Icon_RemoteProduction_DRK.svg

DLB_IO_Icon_RemoteProduction_DRK.svg

130 ms

DLB_IO_Icon_CustomerStories_rgb_DRK.svg

DLB_IO_Icon_CustomerStories_rgb_DRK.svg

170 ms

dolbyio-icon-dev-blog-dark-bg.svg

dolbyio-icon-dev-blog-dark-bg.svg

213 ms

dolbyio-documentation-white.svg

dolbyio-documentation-white.svg

169 ms

real-time-streaming-demo-white-dark-bg.svg

real-time-streaming-demo-white-dark-bg.svg

169 ms

RemoteMultivewer-white.svg

RemoteMultivewer-white.svg

136 ms

__ptq.gif

__ptq.gif

60 ms

14544730.js

14544730.js

61 ms

Accessibility Review

developer.dolby.com 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

[aria-hidden="true"] elements contain focusable descendents

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

Buttons do not have an accessible name

High

<frame> or <iframe> elements do not have a title

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

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.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

High

Some elements have a [tabindex] value greater than 0

Best Practices

developer.dolby.com best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

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

developer.dolby.com SEO score

79

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

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

    EN

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Developer.dolby.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that Developer.dolby.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

developer.dolby.com

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