[texhax] Throughput

Heiko Oberdiek heiko.oberdiek at googlemail.com
Fri Mar 4 18:28:55 CET 2011

On Fri, Mar 04, 2011 at 11:46:31AM -0500, William Adams wrote:

> Will things be better in LuaTeX? Really, all one would need would be a
> list structure which one could check before loading a graphic to see if it
> had already been loaded --- add it to the list if not and it ``just
> works''.

Some things can be done better with and without LuaTeX,
some things can never be done better with or without LuaTeX,
and some things can be done better with LuaTeX.
Those "things" depend on the macro interface, the macro driver interface,
the output driver, the TeX compiler and the output format.

If the same image is used twice you have also take into account,
how it is used. There are many parameters that influence the
image loading (width, height, scaling, rotating, clipping, viewport,
image manipulation options, ...). Some of the parameters can also
be applied on the black box where the image is previously saved.
Others require the reloading of the image. Of course, the set
of parameters might differ for different drivers and image types.

Yours sincerely
  Heiko Oberdiek

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