In the file Zitouna_Mosque_plan.svg, the excessive memory usage appears to be related to the attribute stroke-miterlimit. The original file has a lot of objects in it with the style attribute 'stroke-miterlimit:500'. In the Inkscape Fill and Stroke dialog, the maximum allowed value is 100. If I edit the svg file and globally replace 'stroke-miterlimit:500' with 'stroke-miterlimit:5' then the memory problem appears to go away, as far as I can tell, sample file attached.
Alvin http://inkscape.13.n6.nabble.com/file/n3382542/Zitouna_Mosque_plan5.svg Zitouna_Mosque_plan5.svg
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