Should I use lazy or eager transformations?

Cloudinary can manipulate your images during the image upload process (eager transformations), or on demand, when accessed by your visitors (lazy transformations).
For lazy transformations, all transformed images are generated on-the-fly, stored persistently, cached and delivered through a fast CDN. This means that the first view request of a derived image will be somewhat slower, while subsequent requests will be fast. The time required for generating a transformation depends on various factors: original image dimensions, requested dimensions, applied effects and specific transformations.
The eager approach requires a little planning, but is highly recommended if you have pages with many transformed images. In addition, using eager transformations allows you to make sure that all transformed images are ready for fast delivery even for the first visitors of your site. See additional information here.

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