jnicklas/carrierwave — pull request #627 by ferblape (2012-02-21 15:35:05+00:00)
Title: Allow a new option in versions from which start to process the file.

For performance reasons, when you are working with big files it makes sense, if possible, start processing the file from a small version, instead of using the original one. I.e.:

version :thumb do
process resize_to_fill: [280, 280]
end

version :small, from_version: :thumb do
process resize_to_fill: [60, 60]
end