Tools & Wizards About Us
d1w9csuen3k837.cloudfront.net screenshot

Report Summary

  • 23

    Performance

    Renders faster than
    41% of other websites

  • 96

    Accessibility

    Visual factors better than
    that of 88% of websites

  • 67

    Best Practices

    More advanced features
    available than in
    24% of websites

  • 91

    SEO

    Google-friendlier than
    70% of websites

d1w9csuen3k837.cloudfront.net

Chemistry news, research and opinions | Chemistry World

Page Load Speed

3.3 sec in total

First Response

10 ms

Resources Loaded

2.6 sec

Page Rendered

740 ms

d1w9csuen3k837.cloudfront.net screenshot

About Website

Visit d1w9csuen3k837.cloudfront.net now to see the best up-to-date D 1 W 9 Csuen 3 K 837 Cloudfront content for United States and also check out these interesting facts you probably never knew about d1w9csuen3k837.cloudfront.net

Chemistry, covered. Science news, research, reviews, features and opinions. Read Chemistry World to keep up with stories from across the chemical sciences.

Visit d1w9csuen3k837.cloudfront.net

Key Findings

We analyzed D1w9csuen3k837.cloudfront.net page load time and found that the first response time was 10 ms and then it took 3.3 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

d1w9csuen3k837.cloudfront.net performance score

23

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.4 s

37/100

10%

LCP (Largest Contentful Paint)

Value20.4 s

0/100

25%

SI (Speed Index)

Value7.3 s

29/100

10%

TBT (Total Blocking Time)

Value2,790 ms

3/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value24.3 s

0/100

10%

Network Requests Diagram

d1w9csuen3k837.cloudfront.net

10 ms

www.chemistryworld.com

394 ms

gpt.js

53 ms

core.css

143 ms

jquery.min.js

29 ms

Our browser made a total of 93 requests to load all elements on the main page. We found that 1% of them (1 request) were addressed to the original D1w9csuen3k837.cloudfront.net, 52% (48 requests) were made to D2cbg94ubxgsnp.cloudfront.net and 18% (17 requests) were made to Chemistryworld.com. The less responsive or slowest element that took the longest time to load (1.1 sec) relates to the external source Account.chemistryworld.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 302.1 kB (16%)

Content Size

1.9 MB

After Optimization

1.6 MB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of D1w9csuen3k837.cloudfront.net main page is 1.9 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. 75% of websites need less resources to load and that’s why Accessify’s recommendations for optimization and resource minification can be helpful for this project. Images take 805.8 kB which makes up the majority of the site volume.

HTML Optimization

-83%

Potential reduce by 185.3 kB

  • Original 222.1 kB
  • After minification 215.8 kB
  • After compression 36.8 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 185.3 kB or 83% of the original size.

Image Optimization

-6%

Potential reduce by 45.5 kB

  • Original 805.8 kB
  • After minification 760.2 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. D 1 W 9 Csuen 3 K 837 Cloudfront images are well optimized though.

JavaScript Optimization

-5%

Potential reduce by 40.6 kB

  • Original 753.8 kB
  • After minification 753.8 kB
  • After compression 713.2 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. This website has mostly compressed JavaScripts.

CSS Optimization

-22%

Potential reduce by 30.8 kB

  • Original 142.8 kB
  • After minification 135.8 kB
  • After compression 112.0 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. D1w9csuen3k837.cloudfront.net needs all CSS files to be minified and compressed as it can save up to 30.8 kB or 22% of the original size.

Requests Breakdown

Number of requests can be reduced by 20 (24%)

Requests Now

82

After Optimization

62

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 82 CSS, Javascripts, AJAX and image requests in order to completely render the main page of D 1 W 9 Csuen 3 K 837 Cloudfront. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 17 to 1 for JavaScripts and from 5 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

d1w9csuen3k837.cloudfront.net

d1w9csuen3k837.cloudfront.net

10 ms

www.chemistryworld.com

www.chemistryworld.com

394 ms

gpt.js

gpt.js

53 ms

core.css

core.css

143 ms

jquery.min.js

jquery.min.js

29 ms

global_2024.css

global_2024.css

354 ms

eme_2024.css

eme_2024.css

661 ms

spin_2024.css

spin_2024.css

658 ms

adsbygoogle.js

adsbygoogle.js

79 ms

core.js

core.js

280 ms

global_2024.js

global_2024.js

654 ms

index.min.js

index.min.js

76 ms

eme_2024.js

eme_2024.js

650 ms

spin_2024.js

spin_2024.js

762 ms

pubads_impl.js

pubads_impl.js

7 ms

print.css

print.css

73 ms

prum.min.js

prum.min.js

655 ms

templatejs

templatejs

1135 ms

gtm.js

gtm.js

337 ms

gtm.js

gtm.js

769 ms

536258_3db5740e7d584d719f461b004fe7e21b_369493.jpg

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154 ms

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330 ms

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352 ms

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353 ms

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353 ms

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353 ms

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354 ms

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354 ms

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354 ms

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536231_idx41557_2024_1622_author3icopy_778987.jpg

355 ms

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638 ms

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355 ms

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638 ms

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637 ms

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355 ms

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637 ms

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637 ms

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760 ms

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944 ms

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942 ms

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942 ms

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942 ms

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941 ms

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943 ms

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1054 ms

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1054 ms

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1054 ms

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1055 ms

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1056 ms

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1055 ms

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1057 ms

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1057 ms

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1056 ms

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1056 ms

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1056 ms

sprite.css-aea60e94.svg

sprite.css-aea60e94.svg

256 ms

ads

ads

486 ms

container.html

container.html

778 ms

PlantinLight.woff

PlantinLight.woff

484 ms

AvenirNextMedium.woff

AvenirNextMedium.woff

485 ms

AvenirNextLight.woff

AvenirNextLight.woff

789 ms

AvenirNextDemi.woff

AvenirNextDemi.woff

788 ms

AvenirNextBold.woff

AvenirNextBold.woff

792 ms

ads

ads

579 ms

ads

ads

735 ms

ads

ads

681 ms

5324123983045291725

5324123983045291725

488 ms

abg_lite.js

abg_lite.js

488 ms

window_focus.js

window_focus.js

488 ms

ufs_web_display.js

ufs_web_display.js

313 ms

icon.png

icon.png

482 ms

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536208_gettyimages1337249693_429934.jpg

423 ms

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479 ms

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536233_index_1_811635.jpg

423 ms

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536193_gregory_robinson3_2copy_440266.jpg

482 ms

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536183_00033500_493088_crop.jpg

424 ms

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535771_shutterstock_1897442377_463622.jpg

479 ms

534002_cbdimageindexshutterstock_172286.jpg

534002_cbdimageindexshutterstock_172286.jpg

479 ms

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536157_3dmolecularimageonblurredbackgroundshutterstock_736323.jpg

482 ms

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535453_shutterstock_5564512511_63443_crop.jpg

482 ms

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536233_index_1_811635.jpg

483 ms

newslettersingleclick

newslettersingleclick

410 ms

newslettersingleclick

newslettersingleclick

412 ms

newslettersingleclick

newslettersingleclick

414 ms

most

most

404 ms

redirectcaptcha.htm

redirectcaptcha.htm

172 ms

icon.png

icon.png

73 ms

api.js

api.js

58 ms

reactionhero_578232.jpg

reactionhero_578232.jpg

30 ms

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6 ms

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5 ms

sprite.css-4705f15d.svg

sprite.css-4705f15d.svg

135 ms

recaptcha__en.js

recaptcha__en.js

53 ms

Accessibility Review

d1w9csuen3k837.cloudfront.net accessibility score

96

Accessibility Issues

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

Links do not have a discernible name

Best Practices

d1w9csuen3k837.cloudfront.net 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

High

Browser errors were logged to the console

High

Missing source maps for large first-party JavaScript

SEO Factors

d1w9csuen3k837.cloudfront.net SEO score

91

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

High

Tap targets are not sized appropriately

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 D1w9csuen3k837.cloudfront.net 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 D1w9csuen3k837.cloudfront.net 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

d1w9csuen3k837.cloudfront.net

Open Graph data is detected on the main page of D 1 W 9 Csuen 3 K 837 Cloudfront. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook: