University College London - 10007784ACTIVE

Replaced Institute of Education, University of London, School of Pharmacy University of London(The).

Emissions

• URL: https://www.ucl.ac.uk/

  Time to load: 0.9 seconds

  Date checked	CO2 / grams	Page size	Energy
  2023-12-07	1.00	4.6MB	GREEN
  2022-09-06	10.09	18.5MB	GREEN
  2022-06-09	9.35	17.1MB	GREEN
  2022-04-12	7.20	13.2MB	GREEN
  2022-02-01	10.46	19.1MB	GREEN
  2021-11-03	8.81	16.1MB	GREEN
  2021-10-06	10.19	18.7MB	GREEN
  2021-09-01	10.10	18.5MB	GREEN
  2021-07-29	9.45	17.3MB	GREEN
  2021-06-30	9.73	17.8MB	GREEN
  2021-06-01	10.15	18.6MB	GREEN

  Tip: Optimise images

  We estimate potential to save at least 539kB* by optimising images:

  1. homepage-bannerv2_0.... is 1.0MB
  2. 404298761_3179784677... is 442kB
  3. charles-summerschool... is 362kB and could be 234kB smaller
  4. disabledandhere-t02.... is 289kB and could be 167kB smaller
  5. prx_figure_cropped.p... is 237kB
  6. studentseventsactivi... is 182kB and could be 28kB smaller
  7. 407485815_1272753393... is 155kB
  8. ucl-portico-side-psw... is 117kB and could be 41kB smaller
  9. video-ucl-societies.... is 92kB and could be 24kB smaller
  10. bravethinkers-still-... is 70kB and could be 11kB smaller
  11. ucl_minds_1060_5971_... is 66kB and could be 22kB smaller
  12. helenczerski-7-credi... is 43kB and could be 9.4kB smaller
  13. chia-jung-tsay-poets... is 30kB and could be 4.3kB 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. all.js is 520kB
  2. widget_iframe.d37472b4a6622d0b... is 106kB

  Tip: Limit third-party code

  Here are the largest sources of third-party code:

  1. Cloudflare CDN uses 94kB
  2. FontAwesome CDN uses 520kB
  3. Twitter uses 135kB
  4. Instagram uses 695kB
  5. Facebook uses 93kB
  6. Google CDN uses 34kB

  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.

  If you use the Twitter widget to load a timeline it may be loading as many as 100 of your recent tweets which may contain lots of images. Try setting 'data-tweet-limit' to the most recent 3.