Re: [Gpsbabel-code] -vs on input

[Robert L. <rob...@us...>]

Robert Lipe wrote:

> If you want to see magproto light up, use the (intentionally vaguely
> documented ) "noack" suboption.  But given your customer base, Clyde, I
> can't at all recommend trading reliability - even if mythical - for xfer
> speed.

And I'm still not recommending it, but let me put this into perspective
at 4800bps:

$ time ./gpsbabel -vs -i magellan,noack -f /dev/ttyS0 -o csv -F /dev/null
100/376/376

real    0m54.221s
user    0m0.000s
sys     0m0.000s
(robertl) rjloud:/home/robertl/src/gpsbabel.virgin
$ time ./gpsbabel -vs -i magellan -f /dev/ttyS0 -o csv -F /dev/null
100/376/376

real    2m30.914s
user    0m0.000s
sys     0m0.000s



At 115K, the distortion is even more pronounced:

(robertl) rjloud:/home/robertl/src/gpsbabel.virgin
$ time ./gpsbabel -vs -i magellan,baud=115200 -f /dev/ttyS0 -o csv -F /dev/null
100/376/376

real    2m30.617s
user    0m0.000s
sys     0m0.000s
(robertl) rjloud:/home/robertl/src/gpsbabel.virgin
$ time ./gpsbabel -vs -i magellan,noack,baud=115200 -f /dev/ttyS0 -o csv -F /dev/null
100/376/376

real    0m3.737s
user    0m0.000s
sys     0m0.000s



The highly trained eye notices the problem when you crank the speed up 
by a factor of 24 yet the speed remains the same...