Subj : kermit protocol in syncterm
To   : Christian Sacks
From : Digital Man
Date : Fri Aug 18 2023 10:31:50

  Re: kermit protocol in syncterm
  By: Christian Sacks to Digital Man on Fri Aug 18 2023 10:42 am

 > On 17 Aug 2023, Digital Man said the following...
 >
 >  DM> And how fast is that? Is possible that the Qodem Zmodem implementation
 >  DM> is just slower than its Kermit implementation?
 >
 > Using Zmodem I'm getting about 850,000 cps or about 106KB/s (if my
 > conversion is correct) locally using SyncTERM
 > Using Kermit I'm getting about 25,900,000 cps or about 3237KB/s (or
 > 3.237MB/s) locally using qodem
 >
 > Both were downloading the same 45MB file from my BBS.
 >
 >  DM> The suggestion was to try Ymodem-G. Ymodem should normally be much
 >  DM> slower than Zmodem over any kind of decent transport due to its ack/nak
 >  DM> nature.
 >
 > Ymodem-G either is broken in mystic or SyncTERM and Mystic don't play well
 > as it just locks up the terminal and doesn't do
 > anything until I force hang up. Ymodem (non -G) is ~same as Zmodem, maybe a
 > little slower.
 >
 > I just tried Regular Ymodem again and now that seems to be borking up too...
 > hmm, might need to restart mystic maybe.

Maybe test with a different BBS software or different protocol driver on the BBS side?

Ymodem-G has almost 0 overhead, so (without compression or other cheats), it's really not possible for Kermit (the protocol) to be faster than Ymodem-G. And Zmodem is only a little slower than Ymodem-G.

So any major speed difference you're seeing (and reporting here) are due to the *implementation* of the protocol on either the sending or receiving side, and not the protocol itself.
-- 
                                            digital man (rob)

Synchronet/BBS Terminology Definition #24:
DOVE = Domain/Vertrauen
Norco, CA WX: 78.8øF, 56.0% humidity, 4 mph SSE wind, 0.00 inches rain/24hrs
---
 þ Synchronet þ Vertrauen þ Home of Synchronet þ [vert/cvs/bbs].synchro.net

.