When not to do maximum compression in png?

Posted by user1444680 on Stack Overflow See other posts from Stack Overflow or by user1444680
Published on 2013-06-27T10:10:07Z Indexed on 2013/06/27 10:21 UTC
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Filed under:

graphics

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compression

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png

Intro
When saving png images through GIMP, I've always used level 9 (maximum) compression, as I knew that it's lossless. Now I've to specify compression level when saving png format image through GD extension of PHP.

Question
Is there any case when I shouldn't compress PNG to maximum level? Like any compatibility issues? If there's no problem then why to ask user; why not automatically compress to max?

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