I have tested open flash chart, gruff, scruffy… They all failed.
1000 bars, open flash chart took 15-20s. Gruff and scruffy were worse.
Sub the work out to gnuplot and have it generate the image maybe…
Indeed: GnuPlot is the oldest and most professional of those plotters
which are only on the list because they got good press!).
Contrarily, GnuPlot is often very cranky to use and poorly documented.
I wrote up how to use GnuPlot for log charts here:
Next, I would not inflict 1 000 bars on my uses. Could you find a way to
data down to useful segments? That’s why I used log charts, for example!