.. note that if this is changed from the default approach of using an *include* (in index.rst) to a separate performance page, the header needs to be changed from === to ***, the filename extension needs to be changed from .inc.rst to .rst, and a link needs to be added in the subpackage toctree .. _astropy-visualization-performance: .. Performance Tips .. ================ .. .. Here we provide some tips and tricks for how to optimize performance of code .. using `astropy.visualization`.