University of Derby - 10007851ACTIVE

Emissions

• URL: https://www.derby.ac.uk/

  Time to load: 1.4 seconds

  Date checked	CO2 / grams	Page size	Energy
  2023-12-07	1.03	4.7MB	GREEN
  2022-09-06	1.56	2.9MB	GREEN
  2022-06-09	1.65	3.0MB	GREEN
  2022-04-12	3.08	5.6MB	GREEN
  2022-02-01	3.95	7.2MB	GREEN
  2021-11-03	3.79	6.9MB	GREEN
  2021-10-06	3.80	7.0MB	GREEN
  2021-09-01	3.64	6.7MB	GREEN
  2021-07-29	3.44	6.3MB	GREEN
  2021-06-30	2.96	5.4MB	GREEN
  2021-06-01	3.59	6.6MB	GREEN

  Tip: Optimise images

  We estimate potential to save at least 144kB* by optimising images:

  1. Solar-Panels-tiny.jpg is 441kB
  2. derby-white-(1).jpg is 430kB and could be 53kB smaller
  3. Turtle-Promo-block.png is 427kB
  4. Turtle-Clearing.jpg is 389kB
  5. MicrosoftTeams-image... is 347kB and could be 53kB smaller
  6. REF-2021-2000x1500-p... is 338kB
  7. Kedleston-Road-tiny.... is 296kB
  8. PICS011-BW-113194-(1... is 249kB and could be 31kB smaller
  9. Bryan-Steel-headshot... is 198kB
  10. UG-prospectus(2000x1... is 63kB and could be 7.2kB smaller

  First, check that images are appropriately sized - you most likely don't need a 6000x4000 pixel image straight from a digital camera. In Windows, the Photos software will let you quickly shrink huge images and will give you an improvement.

  Next you could try using tinyjpg.com (JPG image) or tinypng.com (PNG image) to further optimise your image. This will strip out metadata that may be taking up lots of space.

  *This is an estimate from Google PageSpeed and you may get much better results than this in practice.

  Tip: Large files

  Aside from images, here are the biggest resources:

  1. app.css?version=174.0 is 523kB

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. Google Tag Manager uses 204kB
  2. terminalfour.net uses 3.2MB
  3. Facebook uses 191kB
  4. Optanon uses 158kB
  5. squiz.cloud uses 50kB
  6. Google Fonts uses 42kB
  7. Convert Insights uses 38kB
  8. Google CDN uses 31kB

  Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading.