Slow rendering for specific PDF File with small chunks 16x8

I have another PDF with many small chunks. From PDFBOX-5051 we see chunk sizes of either 1px with or height.

This PDF contains chunks with a size of ~16x8 and rendering times could also be improved by a huge factor if the conditions at https://github.com/apache/pdfbox/blob/283d6f8cdd1695ebe8515355b17ddea7527b5f96/pdfbox/src/main/java/org/apache/pdfbox/pdmodel/graphics/color/PDColorSpace.java#L349 are changed accordingly.