Cython vs Golang

cy.pyx

def do():
    cdef long sum = 0
    cdef int i = 0
    for i in range(2000):
        sum += i*i

    print(sum)

main.go

package main

import "fmt"

func main() {
	sum := 0
	for i := 0; i < 2000; i++ {
		sum += i * i
	}
	fmt.Println(sum)
}

main.py

# The first run would need to compile `cy.pyx` module, so benchmark from the 2nd run
# In real life, we would use setup.py to compile the module into a shared lib before hand
# and we would not need the pyximport stuff. But for quick benchmark, pyximport is more convenient. 

import pyximport
pyximport.install()

import cy

cy.do()

results.txt

➜  playground time go run main.go
2664667000
go run main.go  0.43s user 0.08s system 119% cpu 0.426 total

➜  playground time python main.py
2664667000
python main.py  0.20s user 0.08s system 97% cpu 0.286 total

➜  playground