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000280_news@newsmaster….columbia.edu _Sun Nov 8 17:44:48 1998.msg
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From: Christopher Mosley <cmosley@voicenet.com>
Subject: Re: sluggishness of c-kermit vs. dos kermit
Newsgroups: comp.protocols.kermit.misc
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Date: Sun, 08 Nov 1998 22:44:39 GMT
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Kent B Erickson <kbe@u.washington.edu> wrote:
e> In the customization file of c-kermit I had lines
> which went
> If fail set speed
> It starts out at 115200 and goes down to 19200.
> I may have to modify my earlier assertion regarding file transfer under
> mskermit (dos). Today I downloaded a binary file under mskermit and got a
> speed of 2000 cps plus/minus 100. Then I re-downloaded after calling the
> FAST script. (It does all that unprefixing, minimal error check, etc.
> and says "Use at own risk!") Using at my own risk, I found the speed went
> up to about 2100 cps +/- 100. Anyway the file transfer under os2 +
> obsolete version of c-kermit (of a different binary) was a little faster
> (2500 cps), at least according to these single-time experiments. Still,
> file transfer is slow no matter what.
With mskermit:
Over a plain serial connection I get ~3100 cps with a 28.8 connection
Telneting, using c/slip or ppp not as good ~ 2700 cps with a 28.8
connection (for a compressed file - jpg or zip). Not much degradation
from overhead when done in windows' dos. I think these
thoughputs are what can be expected with _good_ phone lines.
P.S.?
I seem to remember a small faq like document about: set line *,
ppp etc.. It was written in hopes of lessening the barrage of
questions from people using ckermit with linux. Have not been
able to locate this doc. Am I imagining things or maybe not
looking in the right place ?
> If I use the "no speed negotiation" thing and set speed at 34.x ,
> will that speed things up?
> I thought perhaps I ought to get an even speedier modem, but now I doubt
> very much that will improve matters. At one time I had a 14.4 modem.
> Using z-modem and something called COMIT for dos (long gone) I
> consistently got 2 to 3 k cps transfers. I am not knocking kermit, mind,
> I like it, but I still think I should get faster (binary) transfers.
> (Text transfers do not cause as much annoyance: usually they are smaller
> and text transfer is (seems) generally faster. Perhaps because
> compression is more efficient with text transfers?)
> kbe