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Groups > comp.graphics.apps.gnuplot > #4187
| From | Hans-Bernhard Bröker <HBBroeker@t-online.de> |
|---|---|
| Newsgroups | comp.graphics.apps.gnuplot |
| Subject | Re: Why does plotting with point labels make plot generation extremely slow? |
| Date | 2019-04-28 19:11 +0200 |
| Message-ID | <gim56eFmmliU1@mid.dfncis.de> (permalink) |
| References | <0d17edd5-6246-4f25-8edd-df15a0832de8@googlegroups.com> |
Am 28.04.2019 um 11:36 schrieb ciro.santilli@gmail.com:
> This made me curious, since I wouldn't intuitively expect that just adding point labels would add so much overhead.
>
> In particular if the point labels are hypertext, in which case they don't even show and no placement calculation needs to be done for them.
The "hypertext" aspect is a red herring. You're comparing the default
plot style ("with points") with one that has to store and output a
string per input point ("with labels").
Actually the test case can be simplified to
set samples 1000000 # change to see the differences
plot "+" u 1:1:1 w labels
Well, jumping all the way up to a million (intended) clickable links in
your output is soewhat excessive.
But a bit of experimentation with smaller tests reveals quickly what
kind of problem this is: the run time usage grows with the square of the
number of data points. That's because of the choice of data structure
for the labels.
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Why does plotting with point labels make plot generation extremely slow? ciro.santilli@gmail.com - 2019-04-28 02:36 -0700
Re: Why does plotting with point labels make plot generation extremely slow? Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2019-04-28 19:11 +0200
Re: Why does plotting with point labels make plot generation extremely slow? Ethan Merritt <eamerritt@gmail.com> - 2019-04-29 06:52 +0000
Re: Why does plotting with point labels make plot generation extremely slow? ciro.santilli@gmail.com - 2019-04-29 01:01 -0700
Re: Why does plotting with point labels make plot generation extremely slow? Ethan Merritt <eamerritt@gmail.com> - 2019-04-30 01:49 +0000
Re: Why does plotting with point labels make plot generation extremely slow? ciro.santilli@gmail.com - 2019-04-30 01:17 -0700
Re: Why does plotting with point labels make plot generation extremely slow? Ethan Merritt <sfeam@users.sf.net> - 2019-04-30 19:06 +0000
Re: Why does plotting with point labels make plot generation extremely slow? ciro.santilli@gmail.com - 2019-04-30 14:26 -0700
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