University of Durham - 10007143ACTIVE

Emissions

• URL: https://www.dur.ac.uk/

  Time to load: 0.9 seconds

  Date checked	CO2 / grams	Page size	Energy
  2023-12-07	1.05	4.2MB	GRID?
  2022-09-06	3.63	6.0MB	GRID?
  2022-06-09	16.28	27.0MB	GRID?
  2022-04-12	12.68	21.0MB	GRID?
  2022-02-01	8.39	13.9MB	GRID?
  2021-11-03	8.68	14.4MB	GRID?
  2021-10-06	9.63	16.0MB	GRID?
  2021-09-01	13.53	22.4MB	GRID?
  2021-07-29	13.55	22.5MB	GRID?
  2021-06-30	10.57	17.5MB	GRID?
  2021-06-01	4.06	6.7MB	GRID?

  Tip: Optimise images

  1. QS-World-University-... is 148kB
  2. untitled-by-Hossein-... is 123kB

  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. base.js is 784kB
  2. style-durham-20231018.css is 256kB
  3. sprite.svg?v=125fb830 is 141kB
  4. sprite.svg is 141kB
  5. gtm.js?id=GTM-MD895GR is 112kB
  6. curator.embed.js is 101kB
  7. www-embed-player.js is 99kB
  8. js?id=G-HTQ6N1C1EK&cx=c&_slc=1 is 95kB

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. YouTube uses 1.1MB
  2. curator.io uses 169kB
  3. Google Tag Manager uses 300kB
  4. Hotjar uses 60kB
  5. terminalfour.net uses 896kB
  6. b-cdn.net uses 282kB
  7. Facebook uses 224kB
  8. Other Google APIs/SDKs uses 64kB
  9. durham.ac.uk uses 56kB
  10. jQuery 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.