MobileRead Forums - View Single Post - PRS-900 Sony Reader "hangs" for a minute after adding notes

bobo23 · 09-01-2010, 09:23 AM

I checked the metadata saved by the reader.
If it only would use a database we probably won't have any problems.
Unfortunately it seems that is does not use a "real" database, but saves all annotations together in one huge XML file (\dtabase\cache\cacheExt.xml).
I guess that the serialization of this XML file - which has to be done after each note edit - takes far too long. Modern databases can do this a lot (!) more efficient. (Sony: why do not save them separately for each book??)

My cacheExt.xml file is 2.3MB - note adding time is ~1 minute. Anybody has values to compare?

I generally like my PRS-900, but this is a killer. I would never have bought it in the first place. Actually I spent quite a while reading reviews before making the buying decision, but this issue never popped up.

btw: Does anybody know how a Kindle handles a lot of notes?

09-01-2010, 09:23 AM	#7
bobo23 Junior Member Posts: 4 Karma: 176 Join Date: Aug 2010 Device: Sony PRS-900	I checked the metadata saved by the reader. If it only would use a database we probably won't have any problems. Unfortunately it seems that is does not use a "real" database, but saves all annotations together in one huge XML file (\dtabase\cache\cacheExt.xml). I guess that the serialization of this XML file - which has to be done after each note edit - takes far too long. Modern databases can do this a lot (!) more efficient. (Sony: why do not save them separately for each book??) My cacheExt.xml file is 2.3MB - note adding time is ~1 minute. Anybody has values to compare? I generally like my PRS-900, but this is a killer. I would never have bought it in the first place. Actually I spent quite a while reading reviews before making the buying decision, but this issue never popped up. btw: Does anybody know how a Kindle handles a lot of notes?