Resizing of covers is the
only performance issue on any computer, in my experience.
On my NAS, Synology DS-110j (128Mb main memory), I use the setting
Code:
$config['cops_recentbooks_limit'] = '50';
on faster machines I use
Code:
$config['cops_recentbooks_limit'] = '250';
or more. But that only applies to "Recent Items".
When you have a lot of books from one writer or if you have a lot of books with the title starting with the same letter it really can become an issue.
However in my experience if you use a server running Debian or any other flavour of Linux the reading app stays reasonably responsive even when the CPU of your NAS is at 100%.