Graphic file formatsx

[Neal Becker]

I've had some issues similar to this, although none of my timings are
as long as you describe.  I often create plots with matplotlib.  I
believe that if you draw, say a scatterplot with 10^6 data points, the
resulting pdf will contain 10^6 instructions to draw points.  This may
cause slow rendering (and printing!).  The most straightforward fix I
know of is don't do that, write code to resample the results to a
smaller set.  However, that requires work on my part.

I've searched a couple of times for a software solution (say, a
backend for mpl that would automatically simplify plots), but so far I
haven't found anything.  Similarly, it would be nice to have a
solution that directly simplifies a pdf.  I don't think this is the
same thing as compressing a pdf (although I could be wrong).

On Thu, Dec 9, 2021 at 4:44 AM Dr Eberhard Lisse via lyx-users
<lyx-users at lists.lyx.org> wrote:
>
> Steve,
>
> On the Mac I do
>
>         brew install --cask pdf-squeezer
>
> works well, and so I bought the license.  Comes even with a command line
> utility so it went straight into the Makefile :-)-O
>
> I must confess, I have a 3.9 MB accounting software of which I only need
> the installation part which is 6 pages, so I use qpdf to pull out those,
> making 75K.
>
>          brew install qpdf
>
> Besides not having answered (timed) how long it takes, I would
> personally, besides looking at shrinkers, int he first instance look at
> how the sucker is generated and work on that.
>
> I save my images on R with ggplot2::ggsave and the help page shows:
>
>         device  Device to use. Can either be a device function (e.g. png),
>                 or one of "eps", "ps", "tex" (pictex), "pdf", "jpeg",
>                 "tiff", "png", "bmp", "svg" or "wmf" (windows only).
>
> I however, put the R chunks into my LyX files so that the images are
> generated on the fly (knitR).
>
> You asked in another message how many words my handbook has.  It has 25
> child documents and I don't know how to run the stats from the comand
> line, but the result has 950 pages. As I wrote elsewhere when working
> on a chapter I can compile that child document separately which takes
> 5-10 seconds and look at that before running the Makefile. Works for me.
>
> greetings, el
>
> On 08/12/2021 19:37, Steve Litt wrote:
> > Rich Shepard said on Wed, 8 Dec 2021 07:51:56 -0800 (PST)
> >
> >> On Wed, 8 Dec 2021, Dr Eberhard Lisse wrote:
> >
> >>> For my big handbook (which takes 110 seconds to compile (70 on the
> >>> M1)) I have split this into child documents which compile
> >>> individually within 10 to 15 seconds.
> >>
> >> How about loading a PDF image that's 3,704,503 bytes in size while
> >> reading your big handbook?
> >
> > OK, 3,704,503 bytes got my attention. No wonder it's slow.
> >
> > There are ways to shrink PDF size:
> >
> > Web search: linux shrink pdf size
> >
> > SteveT
> [...]
>
>
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