The City University - `10001478`ACTIVE

Emissions

Time to load: 0.8 seconds

Date checked	CO2 / grams	Page size	Energy
2023-12-07	5.13	20.4MB	GRID?
2022-09-06	9.47	15.7MB	GRID?
2022-06-09	8.84	14.7MB	GRID?
2022-04-12	9.24	15.3MB	GRID?
2022-02-01	9.05	15.0MB	GRID?
2021-11-03	8.97	14.9MB	GRID?
2021-10-06	8.97	14.9MB	GRID?
2021-09-01	8.70	14.4MB	GRID?
2021-07-29	8.97	14.9MB	GRID?
2021-06-30	9.27	15.4MB	GRID?
2021-06-01	8.81	14.6MB	GRID?

Tip: Optimise images

We estimate potential to save at least 4.3MB* by optimising images:

student-life-desktop... is 1.9MB and could be 1.2MB smaller
research-centre.jpg is 1.0MB and could be 626kB smaller
school-and-departmen... is 924kB and could be 628kB smaller
london.jpg is 913kB and could be 556kB smaller
research.jpg is 712kB and could be 462kB smaller
doctoral-collage.jpg is 664kB and could be 468kB smaller
breakpoint-desktop.j... is 494kB
breakpoint-desktop.j... is 483kB
research-case-studie... is 444kB and could be 332kB 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:

2023-city-hero-video-1920x1080... is 7.6MB

Tip: Limit third-party code

Here are the largest sources of third-party code:

Cookiebot uses 124kB
Google Tag Manager uses 117kB

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.