University of Glasgow - 10007794ACTIVE

Emissions

• URL: https://www.gla.ac.uk/

  Time to load: 1.6 seconds

  Date checked	CO2 / grams	Page size	Energy
  2023-12-07	0.41	1.6MB	GRID?
  2022-09-06	0.72	1.2MB	GRID?
  2022-06-09	1.26	2.1MB	GRID?
  2022-04-12	0.73	1.2MB	GRID?
  2022-02-01	0.72	1.2MB	GRID?
  2021-11-03	0.68	1.1MB	GRID?
  2021-10-06	0.75	1.2MB	GRID?
  2021-09-01	0.73	1.2MB	GRID?
  2021-07-29	0.72	1.2MB	GRID?
  2021-06-30	0.71	1.2MB	GRID?
  2021-06-01	0.71	1.2MB	GRID?

  Tip: Optimise images

  We estimate potential to save at least 49kB* by optimising images:

  1. Media_711772_smxx.webp is 244kB
  2. Media_813392_smxx.jpg is 140kB and could be 15kB smaller
  3. Media_627185_smxx.jpg is 107kB and could be 19kB smaller
  4. Media_383416_smxx.jpg is 100kB and could be 9.9kB smaller
  5. Media_334536_smxx.jpg is 99kB
  6. Media_683231_smxx.jpg is 78kB
  7. Media_773746_smxx.jpg is 66kB and could be 5.7kB 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. main.css?_=1701949853 is 209kB
  2. main.min.js?_=1701949853 is 132kB
  3. js?id=G-BH0Z4FTSKF&l=dataLayer... is 93kB
  4. gtm.js?id=GTM-K4S47B4 is 69kB

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. Google Tag Manager uses 162kB
  2. Google Fonts uses 62kB

  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.