Hi,
We recently had also troubles with larger saved SVG files from IGV-Web. Issue was less the file size but that it was practically impossible to edit the SVG files in Inkscape or Illustrator (most likely to the amount of elements).
I solved the issue converting the files from SVG to PDF using "
rsvg-convert" of the "
librsvg2-bin" (2.52.5+dfsg-3) package (e.g. "
rsvg-convert -f pdf -o fixed_file.pdf file_with_issues.svg"; using Ubuntu 22.04)
Reduced the file size from MB to KB, and the PDF files opened without issues in other software and with no larger delay manipulating them.
Aware that it is an old post, but maybe above helps someone.
Best regards,
Andreas