Proper Julia code is much faster than this. Embed in a function. #8
Description
In Julia you need to insert the code within a function. Doing so makes the code much faster.
And you shouldn't have to include the first time execution time.
This code takes only 1.2ms in my computer, properly benchmarked with the package Benchmarktools.
function f()
rounds = parse(Int64,strip(read("rounds.txt", String)))
x = 1.0
pi = 1.0
for i in 2:(rounds + 2)
x *= -1
pi += x / (2 * i - 1)
end
pi *= 4
print(pi)
end
(I have updated the read function to make it compatible with Julia 1.3. Other packages are faster reading files)
It's not fair that you predeclare types in other languages benchmarks, such as C, and not in Julia.
You could also use @fastmath, @inbounds, @simd, and in version 1.3 you can easily create a multithreaded version (many other languages cannot do it).