Change Details

== Background It seem likes currently Page previews requests images that are constrained within a 300x300 pixels box. With retina displays considered, that means 300 and 600 boxed thumbnails are requested. Those sizes are commonly used, but 320/640 are more prevalent and are also pre-rendered for new images. Switching Page previews to 320 for its thumbnail sizes (640 when retina) would increase the likelihood of the thumbnail being a cache hit by a factor of 2 to 3. Meaning better performance on average. == Acceptance criteria [] Switch page previews to 320 for thumbnail sizes

== Background It seem likes currently Page previews requests images that are constrained within a 300x300 pixels box. With retina displays considered, that means 300 and 600 boxed thumbnails are requested. Those sizes are commonly used, but 320/640 are more prevalent and are also pre-rendered for new images. Switching Page previews to 320 for its thumbnail sizes (640 when retina) would increase the likelihood of the thumbnail being a cache hit by a factor of 2 to 3. Meaning better performance on average. == Acceptance criteria [] Switch Page Previews to 320 for thumbnail sizes == Developer Notes # The thumbnail size is defined: - In `src/constants.js` [here](https://github.com/wikimedia/mediawiki-extensions-Popups/blob/cb37dc83d6c1ceee541bf9c06eaf74d75f0a46d2/src/constants.js#L17); and - In `src/ui/renderer.js` [here](https://github.com/wikimedia/mediawiki-extensions-Popups/blob/8510b4b9428457c54bdc7ce4a97d3e45c819029f/src/ui/renderer.js#L16) and [here](https://github.com/wikimedia/mediawiki-extensions-Popups/blob/8510b4b9428457c54bdc7ce4a97d3e45c819029f/src/ui/renderer.js#L19). # The spec (T173434#3539276) does require the changes to `src/ui/renderer.js`.

== Background It seem likes currently Page previews requests images that are constrained within a 300x300 pixels box. With retina displays considered, that means 300 and 600 boxed thumbnails are requested. Those sizes are commonly used, but 320/640 are more prevalent and are also pre-rendered for new images. Switching Page previews to 320 for its thumbnail sizes (640 when retina) would increase the likelihood of the thumbnail being a cache hit by a factor of 2 to 3. Meaning better performance on average. == Acceptance criteria [] Switch page previews to 320 for thumbnail sizesPage Previews to 320 for thumbnail sizes == Developer Notes # The thumbnail size is defined: - In `src/constants.js` [here](https://github.com/wikimedia/mediawiki-extensions-Popups/blob/cb37dc83d6c1ceee541bf9c06eaf74d75f0a46d2/src/constants.js#L17); and - In `src/ui/renderer.js` [here](https://github.com/wikimedia/mediawiki-extensions-Popups/blob/8510b4b9428457c54bdc7ce4a97d3e45c819029f/src/ui/renderer.js#L16) and [here](https://github.com/wikimedia/mediawiki-extensions-Popups/blob/8510b4b9428457c54bdc7ce4a97d3e45c819029f/src/ui/renderer.js#L19). # The spec (T173434#3539276) does require the changes to `src/ui/renderer.js`.