Open University(The) - 10007773ACTIVE

Emissions

  • URL: https://www.open.ac.uk/

    Time to load: 2.8 seconds

    Date checkedCO2 / gramsPage sizeEnergy
    2023-12-070.893.5MBGRID?
    2022-09-065.639.3MBGRID?
    2022-06-092.604.3MBGRID?
    2022-04-121.031.7MBGRID?
    2022-02-010.931.5MBGRID?
    2021-11-034.076.8MBGRID?
    2021-10-064.076.8MBGRID?
    2021-09-010.881.5MBGRID?
    2021-07-290.941.6MBGRID?
    2021-06-301.031.7MBGRID?
    2021-06-010.981.6MBGRID?

    Tip: Optimise images

    We estimate potential to save at least 1.7MB* by optimising images:

    1. home-research-new.jpg is 1.7MB and could be 1.5MB smaller
    2. Planet%20Earth3.png is 158kB
    3. TEF-website-banner-m... is 125kB and could be 64kB smaller
    4. Homepage_banner_imag... is 72kB
    5. TEF-website-banner-h... is 69kB and could be 39kB smaller
    6. open-learn.jpg is 64kB and could be 48kB smaller
    7. train-your-staff2.jpg is 41kB and could be 26kB 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. 221317523.js is 149kB
    2. hawksearch.min.js?v1.0 is 125kB
    3. gtm.js?id=GTM-PPS2SH is 114kB
    4. Page is 97kB
    5. js?id=G-Z74G55VLY4&l=dataLayer... is 97kB

    Tip: Limit third-party code

    Here are the largest sources of third-party code:

    1. Google Tag Manager uses 211kB
    2. Optimizely uses 150kB
    3. Hawk Search uses 148kB
    4. Adobe Tag Manager uses 72kB
    5. YouTube uses 72kB
    6. cassiecloud.com uses 45kB
    7. Google 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.

    Screenshot