message: Make y-axis linear for speedup.
diff: @@ -396,7 +396,7 @@ if(speedup > 1) {
  // TODO: when there is data missing at one end, the axes might be weird
  picture secondary = secondaryY(new void(picture pic) {
  - scale(pic,Log,Log);
  + scale(pic,Log,Linear);
  real ymin = inf;
  real ymax = -inf;
  int penidx = testlist.length;
  