A few notes on choosing between Go and D for a quick project
Walter Bright via Digitalmars-d
digitalmars-d at puremagic.com
Fri Mar 20 03:50:30 PDT 2015
On 3/20/2015 12:42 AM, Paulo Pinto wrote:
> On Friday, 20 March 2015 at 05:17:11 UTC, Walter Bright wrote:
>> Sigh. The Python version:
>> import sys
>> if __name__ == "__main__":
>> if (len(sys.argv) < 2):
>> infile = open(sys.argv)
>> linect = 0
>> for line in infile:
>> linect += 1
>> print "There are %d lines" % linect
>> does not allocate memory. The splitLines() version:
>> [...] cutted
> Of course it does allocate memory.
> Python's "for...in" makes use of iterators and generators, already there you
> have some allocations going around.
> Not only that, there is one string being allocated for each line in the file
> being read, even if it isn't used.
Since 'line' is never referred to again after constructed, even a simple
optimizer could elide it.
It would be easy to test - accumulate the lines in an array, and check the times.
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