2007-01-22
Python VS Ruby
今天突发奇想，把Python做了一个小比较，代码来自ruby的计算PI的例子，我以算10000位为标准，比较了一下二者的效率。
pi.rb
k, a, b, a1, b1 = 2, 4, 1, 12, 4
n=10000
time1 = Time.new
while n>0
# Next approximation
p, q, k = k*k, 2*k+1, k+1
a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
# Print common digits
d = a / b
d1 = a1 / b1
while d == d1
#print d
#$stdout.flush
a, a1 = 10*(a%b), 10*(a1%b1)
d, d1 = a/b, a1/b1
end
n-=1
end
time2 = Time.new
print (time2-time1).to_f
pi.py
from time import clock
k, a, b, a1, b1 = 2, 4, 1, 12, 4
time = clock()
n=10000
while n>0:
# Next approximation
p, q, k = k*k, 2*k+1, k+1
a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
# Print common digits
d = a / b
d1 = a1 / b1
while d == d1:
#print d,
a, a1 = 10*(a%b), 10*(a1%b1)
d, d1 = a/b, a1/b1
n-=1
print clock() - time
为了屏蔽IO操作对效率的影响，注释调了输出语句。
结果如下：
>ruby pi.rb
12.985
>Exit code: 0
>pythonw -u "pi.py"
12.405357027
>Exit code: 0
还是Python略胜一筹。
pi.rb
k, a, b, a1, b1 = 2, 4, 1, 12, 4
n=10000
time1 = Time.new
while n>0
# Next approximation
p, q, k = k*k, 2*k+1, k+1
a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
# Print common digits
d = a / b
d1 = a1 / b1
while d == d1
#print d
#$stdout.flush
a, a1 = 10*(a%b), 10*(a1%b1)
d, d1 = a/b, a1/b1
end
n-=1
end
time2 = Time.new
print (time2-time1).to_f
pi.py
from time import clock
k, a, b, a1, b1 = 2, 4, 1, 12, 4
time = clock()
n=10000
while n>0:
# Next approximation
p, q, k = k*k, 2*k+1, k+1
a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
# Print common digits
d = a / b
d1 = a1 / b1
while d == d1:
#print d,
a, a1 = 10*(a%b), 10*(a1%b1)
d, d1 = a/b, a1/b1
n-=1
print clock() - time
为了屏蔽IO操作对效率的影响，注释调了输出语句。
结果如下：
>ruby pi.rb
12.985
>Exit code: 0
>pythonw -u "pi.py"
12.405357027
>Exit code: 0
还是Python略胜一筹。
# posted by tinylee @ 7:44 下午 
