function fcount(x::Vector{Bool})
    sumx = sum(x)
    Dict{Bool, Int}(true => sumx, false => length(x) - sumx)
end

srand(2)
bool = rand(Bool, 1000000000)
@time fcount(bool)
# 0.612951 seconds (629 allocations: 36.195 KiB)
# Dict{Bool,Int64} with 2 entries:
#   false => 499978312
#   true  => 500021688

The original Julia code ```julia function fcount(x::Vector{Bool}) sumx = sum(x) Dict{Bool, Int}(true => sumx, false => length(x) - sumx) end srand(2) bool = rand(Bool, 1000000000) @time fcount(bool) # 0.612951 seconds (629 allocations: 36.195 KiB) # Dict{Bool,Int64} with 2 entries: # false => 499978312 # true => 500021688 ```