Hi Arink,

Have you already done some profiling? That could be tricky at the C level.
I'm also curious about the hash table, what gets hashed and where do you get the improved efficiency? Admittedly, the way in which ufuncs currently detect scalars is a bit heavy weight and a fast path for certain inputs values could help. Is that what you are doing?

As to the schedule, I suspect that it may be a bit ambitious but I don't see that as fatal by any means. Identifying bottlenecks and experimenting with solutions would be useful work.

Chuck