Comment 3 for bug 1458616

The filter definition defines a rather large height of the filter effects region (FER) of the Gaussian blur (same filter effect is in use for the blurred lines):

    <filter
       height="1081.0118"
       y="-540.00592"
       width="1.0120001"
       x="-0.0060000666"
       id="filter16122-64-8-2-01-3-1-7"
       inkscape:collect="always"
       color-interpolation-filters="sRGB">
      <feGaussianBlur
         id="feGaussianBlur16124-29-9-1-0-4-12-8"
         stdDeviation="0.22500248"
         inkscape:collect="always" />
    </filter>

Reducing the the y-offset and the height of the FER (can be done via built-in filter editor) to a reasonable value (these are percentages of the geom bbox, not absolute values in SVG user units) improves rendering performance and the size of the selection bounding box in 0.91 AFAICT (tested with 0.91 r13725 and 0.91+devel r14172 on OS X 10.7.5).