[web2py] LIKE is slow on RDBS; true for GAE also?

[Matthew]

When implementing "LIKE", I noticed that the following line is
extremely slow (for large numbers of records) on RDBS:

rows = db(buyer.id>0).select().find(lambda
row:row.name.startswith('C'))

I haven't uploaded my data to GAE yet to test. Before I do, since the
upload is rather monotonous, does anyone know that the speed on GAE is
much faster with the syntax above?

Reference: http://www.web2pyslices.com/main/slices/take_slice/16

Thanks,
Matthew