[sqlite] Pre-allocating disk space to avoid db file fragments

[GreatNews]

Hi D. Richard Hipp,
 
I'm developing a desktop rss reader using your excellent sqlite engine. One
issue my users found is that sqlite database can get heavily fragmented over
time. I'm wondering if it's a viable suggestion that sqlite pre-allocates
disk space when creating database, and grows the db file by bigger
chunk(e.g. grow by 20% or so in size each time)?
 
Thanks,
 
Jack