Recommendation : 9. Implement technical solutions with the lowest impact
Are image resizing processed upstream and statically (server side) ?
UI
C People
A Planet
B Prosperity
Difficulty
*
Priority
High
Récurrence
OnUpdate
Tests
Is each image available in its useful format?
Precisions
Services use multiple sizes of the same image for different purposes. The resizing of the images, when it is carried out on demand, generates processing loads, the production of intermediate files which introduce energy losses at each request. It is more efficient if the images are available in the different sizes used by the service.
Use Case
Browser tools/consoles allow to check compliance w/ best practices for images resizing, compression (CHROME: extension greenIT : best practices)
Additional elements
Operational issues related to the project
Rule for assessing the level of compliance of the criterion
Number of images analyzed / Number of images
Life cycle
Déploiement
20 other criteria related to the recommendation: Implement technical solutions with the lowest impact
UI
Is a clean version available for prints ?
user Experience
Is a CSS alternative available for an animation ?
user Experience
Is the service suitable for different accessibility media formats ?
UI
Are the animations necessary, desired by the user ?
UI
Is the service developed in accordance with RGAA recommendations ?
UI
Are the fonts used not loaded only for a small number of objects ?
UI
If printing, is an ink saving font installed ?
UI
Do you limit the number of fonts loaded for the service ?
UI
Are you reducing the number of pictograms used in the service ?
UI
Is a video the only solution for the expected illustration ?
UI
Are videos or animations outside the active area automatically paused / stopped ?
UI
Is it really a user action that triggers the "play" ?
UI
Is the definition of the sound suitable ?
UI
Does the lazy load bring a gain (weight of the page, CPU resource) ?
UI
Is formatting in css preferred, to limit the use of images ?
UI
Are CSS sprites implemented to limit the flow of image fetching ?
UI
Are alternative image formats made available through srcset ?
UI
Do all images have a text alternative ?
UI
Is the definition of the image reduced and adapted to its objective (illustration, contractual, ...) ?
UI
Have the different image formats available been evaluated to select only the most effective ?