Quote:
Originally Posted by PatNY
A question: What kind of a a performance hit would I incur by setting the quality level to 90 or 99? Is it just the length of time it takes for Calibre to send new covers to CC? If so, I don't mind that at all. I am not too concerned with speed when importing books as that won't happen too frequently. Or will it slow down metadata sync on every single connect? That is a different matter and something to be concerned about.
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My tests indicate that the cover grows by around 40% when compression is changed from 90 to 99. That will impact the time to send metadata either direction. It shouldn't significantly change the processing time to display the images.
As regards sending time, the new metadata caching stuff I am working on will make that much less of an issue. The next CC prerelease cycle that should start next week will send metadata to calibre only if calibre hasn't seen that metadata before. This means that the "sending metadata to calibre" time will be reduced dramatically. See
https://www.mobileread.com/forums/sho...32#post2630832 for some timing test results.
What isn't clear to me is whether 99 is visibly much different from 90. I didn't see much difference, but then I am not a good critic of this sort of thing. Once the code works, let me know.