Speed up preparation of data for estimates computation
Function preparing data for consequent computation of estimates takes considerable large amount of total processing time:
test fst_1p_data ... ok 9190 ms
test fst_1p_total ... ok 12221 ms
test fst_1p_ratio ... ok 14315 ms
...
test fst_2p_data ... ok 12763 ms
test fst_2p_total ... ok 14462 ms
test fst_2p_ratio ... ok 50470 ms