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Latest Performance Report for:

https://www.tudelft.nl/tbm/

Sat, May 28, 2022 2:32 AM -0700
London, UK
Chrome (Desktop) 98.0.4758.102, Lighthouse 9.3.1

GTmetrix Grade

Performance 

72%

Structure 

70%

Web Vitals

Largest Contentful PaintLCP 

2.2s

Total Blocking TimeTBT 

255ms

Cumulative Layout ShiftCLS 

0.01

Speed Visualization

0.3s
0.7s
1s
1.3s
1.6s
2s
2.3s
2.6s
2.9s
3.3s

Top Issues

These audits are identified as the top issues impacting your performance.

Impact Audit
High Avoid enormous network payloads LCP Total size was 15.3MB
High Reduce initial server response time FCP LCP Root document took 1.0s
Med Properly size images Potential savings of 7.69MB
Med Serve static assets with an efficient cache policy Potential savings of 8.44MB
Med Efficiently encode images Potential savings of 6.09MB
Med-Low Use a Content Delivery Network (CDN) 9 resources found
Low Avoid an excessive DOM size TBT 988 elements
Low Use passive listeners to improve scrolling performance 3 event listeners not passive
Low Avoid long main-thread tasks TBT 5 long tasks found
Low Serve images in next-gen formats Potential savings of 10.9MB
Low Reduce unused CSS FCP LCP Potential savings of 141KB
Low Avoid chaining critical requests FCP LCP 9 chains found
Low Reduce unused JavaScript LCP Potential savings of 194KB
Low Eliminate render-blocking resources FCP LCP Potential savings of 0 ms
Low Ensure text remains visible during webfont load FCP LCP 4 fonts found
Low Reduce JavaScript execution time TBT 368ms spent executing JavaScript
Low Avoid serving legacy JavaScript to modern browsers TBT Potential savings of 6.27KB
Low Defer offscreen images Potential savings of 10.3MB
Low Minify CSS FCP LCP Potential savings of 2.43KB
No impactful audits found - Great job! No other impactful audits found

Focus on these audits first

These audits likely have the largest impact on your page performance.

Structure audits do not directly affect your Performance Score, but improving the audits seen here can help as a starting point for overall performance gains.

See all Structure audits

Page Details

Your page content is broken down into the following:

3.3s

Fully Loaded Time

Total Page Size - 15.3MB

IMG
14.5MB
JS
421KB
Font
214KB
HTML
130KB
CSS
70.9KB
Other
19.0KB

Total Page Requests - 108

IMG
63.9%
JS
16.7%
Other
11.1%
Font
3.7%
CSS
2.8%
HTML
1.9%

Relative Score

The average score for this recommendation is XX%

Learn more

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