Mock execution with imported STL takes a really long time

[adamchalmers]

Download the STL from here. Note it's 40mb.

import "Julius Caesar.stl" as juliusCaesar

juliusCaesar |> translate(x = -30)
sketch001 = sketch(on = -YZ) {
  line1 = line(start = [var -67.91mm, var -18.86mm], end = [var 29.2mm, var -18.86mm])
  line2 = line(start = [var 29.2mm, var -18.86mm], end = [var 29.2mm, var 137.68mm])
  line3 = line(start = [var 29.2mm, var 137.68mm], end = [var -67.91mm, var 137.68mm])
  line4 = line(start = [var -67.91mm, var 137.68mm], end = [var -67.91mm, var -18.86mm])
  coincident([line1.end, line2.start])
  coincident([line2.end, line3.start])
  coincident([line3.end, line4.start])
  coincident([line4.end, line1.start])
  parallel([line2, line4])
  parallel([line3, line1])
  perpendicular([line1, line2])
  horizontal(line3)
}

When I click to extrude the region, mock execution takes a very very long time, then eventually times out.