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index 87b7a54d236..54688463c10 100644
--- a/Master/texmf-dist/doc/latex/pgfplots/pgfplots.resources.tex
+++ b/Master/texmf-dist/doc/latex/pgfplots/pgfplots.resources.tex
@@ -34,6 +34,21 @@
\end{tikzpicture}
\end{codeexample}
+\pgfplotsexpensiveexample
+\begin{codeexample}[]
+\begin{tikzpicture}
+\begin{axis}[
+ title=$120 \times 120$ Smooth Surface,
+ xlabel=$x$,
+ ylabel=$y$]
+\addplot3[surf,samples=120,shader=interp,domain=0:1]
+ {sin(deg(8*pi*x))* exp(-20*(y-0.5)^2)
+ + exp(-(x-0.5)^2*30
+ - (y-0.25)^2 - (x-0.5)*(y-0.25))};
+\end{axis}
+\end{tikzpicture}
+\end{codeexample}
+
\PGFPlots\ relies completely on \TeX\ to do all typesetting. It uses the front-end-layer and basic layer of \PGF\ to perform all drawing operations. For complicated plots, this may take some time, and you may want to read section~\ref{sec:pgfplots:importexport} for how to write single figures to external graphics files. Externalization is the best way to reduce typesetting time.
However, for large scale plots with a lot of points, limitations of \TeX's capacities are reached easily.