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2013 Sep 19
0
Performance problem generating URL for thousands of images, due to hitting HDD for each one
....
The problem seems to be that just by accessing to the model attribute that
has the uploader mounted, Carrierwave seems to be hitting the disk to
either read the file, check that it exists, or something. In other words,
calling:
user.avatar
user.avatar.cropped
user.avatar.present?
user.avatar.anything_really
All of these hit the HDD.
In the worst case I found, for one of our clients that have a massive
amount of data, the page renders in 10 seconds my dev machine, and 30
seconds on the server. This page render implies about 1200 calls to
"user.avatar.cropped". The difference seems t...