[Android App] Calibre Companion latest numbers

DoctorOhh · 10-11-2012, 10:41 AM

Calibre 0.9.2
Calibre Companion 2.3

I connected my Nexus 7 with 2028 books to calibre in 1 minute 17 seconds. The time that calibre took to compare the metadata was negligible. Previously the time was north of 30 seconds. Very quick.

I deleted all 2028 books and it took 19 minutes and 21 seconds. Also very quick.

I sent all 2028 books back to device. It took 3 minutes for calibre to queue the job and send it to the jobs menu. Then another 3 minutes before it actually started to send books to CC. Total time recorded by calibre in the jobs queue 30 minutes and 47 seconds. Fair time, along the lines of what I would expect.

Once it started the actual physical transfer of the books it sent 1 book every .82 seconds.

chaley · 10-11-2012, 11:58 AM

Thanks for the tests and for the numbers.

An average of .6 seconds per book seems right for a library that size. We put a lot of information about each book in the database to make grouping and sorting fast. The time to remove that info for a book is related to the number of books in the library. For small libraries it takes around 300 ms. My guess is that in your experiment the time started at close to a second and got faster as the library got smaller.

As for sending, for my lib I see an average of around .7 seconds. My guess is that on average your books are slightly bigger than mine.

Note that the (long) db update is overlapped with the network traffic, but it does put a lower limit on the per-book time of around 300 ms, longer if there are lots of tags in each book.

10-11-2012, 10:41 AM	#1
DoctorOhh US Navy, Retired Posts: 9,894 Karma: 13806776 Join Date: Feb 2009 Location: North Carolina Device: Icarus Illumina XL HD, Kindle PaperWhite SE 11th Gen	[Android App] Calibre Companion latest numbers Calibre 0.9.2 Calibre Companion 2.3 I connected my Nexus 7 with 2028 books to calibre in 1 minute 17 seconds. The time that calibre took to compare the metadata was negligible. Previously the time was north of 30 seconds. Very quick. I deleted all 2028 books and it took 19 minutes and 21 seconds. Also very quick. I sent all 2028 books back to device. It took 3 minutes for calibre to queue the job and send it to the jobs menu. Then another 3 minutes before it actually started to send books to CC. Total time recorded by calibre in the jobs queue 30 minutes and 47 seconds. Fair time, along the lines of what I would expect. Once it started the actual physical transfer of the books it sent 1 book every .82 seconds. Last edited by DoctorOhh; 10-11-2012 at 10:46 AM.

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10-11-2012, 11:58 AM	#2
chaley Grand Sorcerer Posts: 12,362 Karma: 8012652 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	Thanks for the tests and for the numbers. An average of .6 seconds per book seems right for a library that size. We put a lot of information about each book in the database to make grouping and sorting fast. The time to remove that info for a book is related to the number of books in the library. For small libraries it takes around 300 ms. My guess is that in your experiment the time started at close to a second and got faster as the library got smaller. As for sending, for my lib I see an average of around .7 seconds. My guess is that on average your books are slightly bigger than mine. Note that the (long) db update is overlapped with the network traffic, but it does put a lower limit on the per-book time of around 300 ms, longer if there are lots of tags in each book.

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