University of Bristol - 10007786ACTIVE

Emissions

• URL: https://www.bristol.ac.uk/

  Time to load: 1.6 seconds

  Date checked	CO2 / grams	Page size	Energy
  2023-12-07	1.13	4.5MB	GRID?
  2022-09-06	1.16	1.9MB	GRID?
  2022-06-09	1.07	1.8MB	GRID?
  2022-04-12	1.08	1.8MB	GRID?
  2022-02-01	1.04	1.7MB	GRID?
  2021-11-03	1.05	1.7MB	GRID?
  2021-10-06	1.33	2.2MB	GRID?
  2021-09-01	1.26	2.1MB	GRID?
  2021-07-29	1.18	2.0MB	GRID?
  2021-06-30	1.10	1.8MB	GRID?
  2021-06-01	1.15	1.9MB	GRID?

  Tip: Optimise images

  We estimate potential to save at least 691kB* by optimising images:

  1. think-big-hero-v2.jpg is 786kB and could be 530kB smaller
  2. bristol-banner-on-br... is 133kB and could be 30kB smaller
  3. park-street-at-night... is 126kB and could be 71kB smaller
  4. looking-to-future.jpg is 108kB and could be 62kB 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. sykO-zNym6YjUruM-QrEh7-nyTnjDw... is 1.1MB
  2. chunk-57ccc441.29d13a15.js is 139kB ×2
  3. gtm.js?id=GTM-MWCJ929 is 134kB
  4. chunk-vendors.3972e8b1.js is 126kB
  5. responsive-web-project-main-2.... is 123kB
  6. fa-brands-400.woff2 is 110kB

  There is 1 duplicate resource included on the page.

  The page uses 2 fonts which require 1.2MB. Could system fonts be used instead?

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. Google Tag Manager uses 383kB
  2. TikTok uses 148kB
  3. Google Fonts uses 1.2MB
  4. Facebook uses 171kB
  5. Cludo uses 86kB
  6. Hotjar uses 60kB

  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.