[imp] imp memory requirement when large image is attached

[Matus UHLAR - fantomas]

Hello,

one of our customers received an e-mail with a big, large, huge image
- 2.1MB jpeg file, 6603x4708 pixels.

The image was supposed to be an atachment, not viewable inline.
(Content-Disposition: attachment; filename="...")
The user even did not have IMP set up to display attachments inline.

However I found out that imp needs ~170MB of memory to display the
message, which did not contain anything else.

Could I know, what causes IMP to eat that much memory?
(gd library?) Is there any possibility to avoid this?
Thank you.
-- 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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