speed of compilation

[boriel]

Good news. I got the performance bottleneck fixed! :!:

I was puzzled, because with default optimization I got:

time ./zxb.py ocman.bas -TaB
real 0m43.375s
user 0m37.190s
sys 0m6.188s

./zxb.py -O3 ocman.bas -TaB
real 3m26.474s
user 3m18.344s
sys 0m8.105s

---

And now I got:
time ./zxb.py scratch/ocman.bas
real 0m16.769s
user 0m16.497s
sys 0m0.256s

time ./zxb.py scratch/ocman.bas -O3 -TaB
real 2m55.524s
user 2m53.971s
sys 0m1.516s

I will upload this new version tonight.