str(bigint) is slow
Delaney, Timothy C (Timothy)
tdelaney at avaya.com
Fri Jul 9 02:34:03 EDT 2004
Bryan wrote:
> does anyone know how to make this faster? it seems that str(x) is
> the slow part.
>
>
> >>> def foo():
> ... t1 = time.time()
> ... x = 19 ** 314159
> ... t2 = time.time()
> ... y = str(x)
> ... t3 = time.time()
> ... print y
> ... t4 = time.time()
> ... print t2-t1, t3-t2, t4-t3
> ...
> >>> foo()
> <snip a print out of a billion numbers>
> 3.78499984741 230.490999937 0.0700001716614
Bryan wrote:
> does anyone know how to make this faster? it seems that str(x) is
> the slow part.
>
> >>> def foo():
> ... t1 = time.time()
> ... x = 19 ** 314159
> ... t2 = time.time()
> ... y = str(x)
> ... t3 = time.time()
> ... print y
> ... t4 = time.time()
> ... print t2-t1, t3-t2, t4-t3
> ...
> >>> foo()
> <snip a print out of a billion numbers>
> 3.78499984741 230.490999937 0.0700001716614
401732 digits actually ... that's not even half a million ...
There was a recent thread titled "How to get decimal form of largest
known prime?" ...
http://tinyurl.com/3b2no
http://groups.google.com.au/groups?hl=en&lr=&ie=UTF-8&threadm=2is27mFqee
n8U1%40uni-berlin.de&rnum=1&prev=/groups%3Fhl%3Den%26lr%3D%26ie%3DUTF-8%
26selm%3D2is27mFqeen8U1%2540uni-berlin.de
Tim Delaney
Tim Delaney
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