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@vchuravy
Created Aug 5, 2014
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Julia
x = {[1:100]...}
function f1(X)
T = None
for x in X
T = promote_type(T,typeof(x))
end
return T
end
function f2(X)
T = promote_type(map(typeof,X)...)
return T
end
function f3(X)
T = reduce((acc, x) -> promote_type(acc, typeof(x)), None, X)
return T
end
inner(acc, x) = promote_type(acc, typeof(x))
function f4(X)
T = reduce(inner, None, X)
return T
end
num_iter = 1000
f1(x)
f2(x)
f3(x)
f4(x)
println("f1")
@time for i in 1:num_iter
f1(x)
end
println("f2")
@time for i in 1:num_iter
f2(x)
end
println("f3")
@time for i in 1:num_iter
f3(x)
end
println("f4")
@time for i in 1:num_iter
f4(x)
end
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