much faster than using Vbox or cygwin or miktex on windows. I wonder if the issue is dvisvgm needing to call out to an external gs process on these Windows machines, instead of linking against libgs.
Anyway, if you want to pursue it further, the author of dvisvgm is Martin Gieseking <martin.giesek...@uos.de>. I imagine he might be interested in your experiments even if there is nothing to be done. --best, karl.