[REBOL] Re: byte frequencies
From: g:santilli:tiscalinet:it at: 7-Jul-2001 14:40
Hello Joel!
On 06-Lug-01, you wrote:
JN> ------ test file size ------
JN> Function 1 Mb 2 Mb 4 Mb 8 Mb
JN> -------- ---- ---- ---- ----
JN> cfdir 3.38 3.71 3.75 3.84
JN> cfcpy 1.00 1.00 1.00 1.00
JN> cfbuf 1.08 1.06 1.10 1.06
IMHO, CFBUF is likely to "explode" for files larger than current
available memory (because of swapping), but this is probably very
platform dependend. CFDIR is probably slow because, with /DIRECT,
it calls lowlevel OS funtions to read from the file for each pick,
reading a char at a time. If the OS is not doing buffering
internally, I'm not surprised it is really so slow.
CFCPY is definitely the way to go to read from (very) large files
IMHO.
Regards,
Gabriele.
--
Gabriele Santilli <[giesse--writeme--com]> - Amigan - REBOL programmer
Amiga Group Italia sez. L'Aquila -- http://www.amyresource.it/AGI/
