Integrated Performance Improvements

FIXME: this page is new

pngperf Some performance enhancements which especially benefit Impress
- #54953 Accelerate PNG import
- #55136 avoid BitInt math in LogicToPixel conversion
- #55170 Allow fast and nicer looking JPEG preview
- #55174 Allow fast PNG preview
- #67234 png export: limit the chunk size
- #67237 jpeg export: use "jpeg progressive mode" for big images
#68520 Improve performance on text formatting, if a lot of objects (>50) have to be considered for text wrapping
#69915 Performance: Increase pack velocity ..
swqbf81 Improve performance with many drawing objects (>50) and text wrapping.
- #68520 Improve performance on text formatting, if a lot of objects (>50) have to be considered for text wrapping
- #69335 frames anchored to page have always "wrap through"]

#66688 performance problem when loading many customshapes from the OpenDocument format

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