JFFS2 - speed up while booting

[linux newbie]

Hi,

I am using linux version (linux.2.6.31) on my embedded ARM based target.

We are using JFFS2 filesystem to read/write data to NAND flash
(32MBytes) and our root file system resides in it.

It takes long time during kernel booting, if we have root file system
in NAND, but its very fast if we place our file system in SDRAM.

Is there any way to speed up the booting process?

Eagerly waiting for your valuable suggestion.

Thanking You