Re: change in handling missing data.

[Ethan A M. <merritt@u.washington.edu>]

On Monday 07 August 2006 12:44 am, Dmitri A. Sergatskov wrote:
> On 8/7/06, Ethan A Merritt <merritt@u.washington.edu> wrote:
> > On Sunday 06 August 2006 10:07 pm, Dmitri A. Sergatskov wrote:

> > For plot "t.dat" using ($1):($2)
> > 4.456u 2.342s 0:06.79 100.0%    0+0k 0+0io 0pf+0w
> >
> > > I did multiple passes, so I am pretty sure the data file is in disk cache.
> > > All this is on FedoraCore 5/ Pentiun4 2.6GHz / 2GB of RAM
> >
> > So it runs faster on my machine, but yes it spends more time on the second test.
> 
> I am surprised that the difference is so large. I tried running both
> hyperthreaded and non-hyperthreaded and it is pretty much the same.
> My file is available at
> ftp://coffee.phys.unm.edu/pub/dima/incoming/t-das.dat.bz2

I get the same timings as before if I use your input data file.
Benchmark script
  set term post
  set output '/dev/null'
  plot "t-das.dat" using 1:2 with lines
Timing
  2.728u 0.133s 0:02.86 99.6%     0+0k 0+0io 0pf+0w

Same with
  plot "t-das.dat" using ($1):($2) with lines
Timing
  4.479u 2.295s 0:06.77 99.8%     0+0k 0+0io 0pf+0w

System info
-----------
lascaux [188] uname -a
Linux lascaux 2.6.12-24mdksmp #1 SMP Mon Jul 17 12:46:00 MDT 2006 
         i686 Intel(R) Pentium(R) 4 CPU 2.60GHz unknown GNU/Linux
lascaux [189] head -1 /proc/meminfo
MemTotal:       514176 kB

gcc version 4.0.1 
CFLAGS = -Wall -g  -O

-- 
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742