Is it just me or are long sweeps brutally slow?

I have a long run of flexible hose that I would like to model as a sweep along a spline, the hose is ~0.5dia and 50ft long.

After creating the weep, If I edit the spline, I have to sit and wait several minutes every time I move a spline point.

If the sweep is deleted, I can edit the spline with no performance hit - I believe SW is rebuilding the sweep while I am editing the defining sketch - why would this be so, it seems out of order to me.

Should I not use this approach to model the hose? (I don't have routing)

I am running XP64 SW 2009 SP 4.1