Algorithm A1 hist_amount pruning method
pruned ← 0	▹ set the number of pruned weights to 0
i ← 0	▹ used for bins indexing
while pruned < fhist_amount · size (W) do	▹ pruned is lower than the threshold
for all w ∈ Bi do	▹ set all the weights in the bin Bi to 0
w ← 0
end for
pruned ← pruned + size (Bi)	▹ update the pruned weights amount
i ← i + 1
end while