During a performance profile session of the rendering we discovered some issues when rendering planar figures (many of them actually). One big part of it were unneccessary heap allocations in mitkPlanarFigureMapper2D.cpp.

float* colorVector = new float[4];
colorVector[0]     = color[0];
colorVector[1]     = color[1];
colorVector[2]     = color[2];
colorVector[3]     = opacity;

Should be replaced with:

const float colorVector[] = {color[0], color[1], color[2], opacity};

The same for shadow and helperColorVector.

Sorry for not using the standard patch workflow...