MobileRead Forums - View Single Post - Calibre always freezes with tag browser shown

chaley · 10-15-2011, 09:30 AM

Regarding making columns: every column you add will add some work, somewhere. However, the work added for non-composite columns is minimal.

Regarding GPM: you got it right. GPM starts with the word program. Do note that the word "program" *must* start in column one. Your example has a space before program. That shouldn't do anything good, but it might be attempting to evaluate it somehow.

One advantage is you can have more than one line, which can make things easier to read. Using your example, you could have:

Code:

program:
list_sort(
   list_difference(
      list_union(field('#shelf'), field('tags'), ','),
      list_union(
         list_union(field('#genre'), field('#length'), ','), 
         field('#character'), 
         ','), 
      ','),
   0, ',')

This lines up the arguments for a function.

As for it running 2 times slower, that makes no sense at all to me. If and when you have some time, could you verify it? First make sure that your templates are working (e.g. no space before program, correct results). Then switch the one that you changed back to template program mode as you had before, and see if it gets faster. If it does, then something very mysterious is going on.

10-15-2011, 09:30 AM	#9
chaley Grand Sorcerer Posts: 12,469 Karma: 8025600 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	Regarding making columns: every column you add will add some work, somewhere. However, the work added for non-composite columns is minimal. Regarding GPM: you got it right. GPM starts with the word program. Do note that the word "program" must start in column one. Your example has a space before program. That shouldn't do anything good, but it might be attempting to evaluate it somehow. One advantage is you can have more than one line, which can make things easier to read. Using your example, you could have: Code: program: list_sort( list_difference( list_union(field('#shelf'), field('tags'), ','), list_union( list_union(field('#genre'), field('#length'), ','), field('#character'), ','), ','), 0, ',') This lines up the arguments for a function. As for it running 2 times slower, that makes no sense at all to me. If and when you have some time, could you verify it? First make sure that your templates are working (e.g. no space before program, correct results). Then switch the one that you changed back to template program mode as you had before, and see if it gets faster. If it does, then something very mysterious is going on.