Users are complaining that listing pages with a large number of images are loading very...

In Drupal 10 and Drupal 11, the correct way to display resized images (such as thumbnails) is by using Image Styles . Image styles allow Drupal to generate derivative images with specific dimensions (e.g., thumbnail size) and serve those instead of the original full-sized image. This significantly improves performance because smaller image files are loaded, reducing page load time and bandwidth usage.

Drupal’s Image module documentation explains that image styles can apply effects such as scaling, cropping, and resizing, and are typically used in Views or field display settings to ensure appropriately sized images are rendered.

Options C and D (JavaScript and CSS resizing) only change how images appear visually but still load the full-size image , which does not improve performance. Option A refers to performance settings but does not specifically handle image resizing.

Therefore, using an image style is the correct, recommended, and documented approach for optimizing image display and improving site performance.