RFile

Hi Initially i used the following code to read from a file to memory.

file *fp;
fp=fopen(filename);
fp.read(RGB.Base(),src[0]*src[1]*3/2);

But later i used RFile as follows

RFile fp;
file.Open(iFsSession, KFileName1, EFileStream|EFileRead);
TPtr8 base1(YUV.Base(),length) ;
file.Read(base1, src[0]*src[1]*3/2);

I found a great improvement in the performance. I could get a performance improvement of allmost five times. Can anybody explain me why? Thanks in advance.