Hi Administrator,
Did you test the performance for Shipping By Country & Order Weight page?  http://localhost/NopCommerce1.05/Administration/ShippingRateComputationMethodDetails.aspx?ShippingRateComputationMethodID=9

entering 250 records on this page will be make it very very slow (~ make the site down), I want to enter around 750 records to comply with my shipping computation.

country1:: 0-1:: 8$
country2:: 0-1:: 6$
...
and again
country1:: 1-2:: 4$
country2:: 1-2:: 2$
...
...

it is very long so I suggest that make a groups for countries to make it faster.
group1:: 0-1:: 8$
group2:: 1-2:: 8$

thats it

Thanks,
Qais Afaneh