G'Day Paul,

On 03-02-96, Lewin Edwards said to Paul Edwards the following :

 PE>> is 2 meg.  Or are you saying that reading from an HPFS disk is
 PE>> faster than reading from memory?  I'd like to see that hard

 LE> It can happen. On my A2000, my hard drive benchmarked considerably
 LE> faster than a RAM drive.

It comes down to what is swapped to disk, and what is not.

HPFS cache is never paged to the swap file, for obvious reasons.  RAM disk
can be.  Thus, every time a cached HPFS read is made, you know it is from
the physical RAM.  Whereas a read from a RAM disk may have actually come
from the swapper.dat file.

Obviously, an UNcached read from a hard disk, regardless of HPFS or FAT
will always be slower than a true RAM disk read (not swapped out).

Benchmarks can be misleading because if it is a repetitive read-write on
the same data, it is likely to be cached by the operating system.

Regards,


       Jason Meaden
       - TeamOS/2

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