a)"When it came to the SQLite performance, a serious performance regression began with the Linux 2.6.26 kernel and ended with the Linux 2.6.29 release. Normally it required 27~28 seconds to perform 12,500 database insertions using SQLite, but with the Linux 2.6.26 through 2.6.28 kernel releases it took 109 seconds! Fortunately, this regression is now fixed."
és
"With the SQLite test profile to measure how long it takes to perform 12,500 insertions using this lightweight SQL database, EXT3 and NILFS2 were the clear winner. It took 20 seconds for this database test to complete under EXT3, 34 seconds under NILFS2, but 870 seconds for EXT4! XFS was at 1312 seconds and Btrfs was at 1472 seconds!"
Ez alapján szerintem foglalkoznak valamelyest (regressziók), ill. erősebb a használt fájlrendszer korlátossága. Pontosabban az a ~600 insert/sec szvsz már házi célokra elég lenne - ha még mindig az ext3-nál tartanánk :)