Plot performance
Undocumented inner plot mechanisms can significantly improve plotting performance
Performance
Plot LimInclude properties
The plot objects' XLimInclude, YLimInclude, ZLimInclude, ALimInclude and CLimInclude properties are an important feature, that has both functional and performance implications.
Performance: scatter vs. line
In many circumstances, the line function can generate visually-identical plots as the scatter function, much faster
Undocumented scatter plot behavior
The scatter plot function has an undocumented behavior when plotting more than 100 points: it returns a single unified patch object handle, rather than a patch handle for each specific
tic / toc – undocumented option
Matlab's built-in tic/toc functions have an undocumented option enabling multiple nested clockings
cellfun – undocumented performance boost
Matlab's built-in cellfun function has an undocumented option to significantly improve performance in some cases.
ismembc – undocumented helper function
Matlab has several undocumented internal helper functions that can be useful on their own in some cases. This post presents the ismembc function.
Undocumented profiler options
The Matlab profiler has some undocumented options that facilitate debugging memory bottlenecks and JIT (Just-In-Time Java compilation) problems.