Re^8: how to read multiple line from a file

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Re^9: how to read multiple line from a file by LanX (Saint) on Apr 14, 2013 at 22:16 UTC
Did I mention that in this case benchmarking goes over theory? Have no time to dig into details, that's why in the meantime I trust others ... see Shift, Pop, Unshift and Push with Impunity!š ... who give me the impression, that Perl arrays have more optimizations than C-Arrays do. > How do you think xav_alloc works? I'm no C-Programmer ... but did I mention that I prefer benchmarking before digging into theory? Cheers Rolf ( addicted to the Perl Programming Language) updates š) excerpt: In comparison, a stack implemented with a perl list will only require reallocations as the list grows larger. However, perl is smartly coded because the use of lists as queues was anticipated. Consequently, these queue-type reallocations have a negligible impact on performance. In benchmarked tests, queue access of a list (using repeated push/shift operations) is nearly as fast as stack access to a list (using repeated push/pop operations). emphasize added!	[reply]
Re^10: how to read multiple line from a file by educated_foo (Vicar) on Apr 16, 2013 at 14:34 UTC
perl is smartly coded because the use of lists as queues was anticipated This is what I meant about memcpy(). I'm surprised that repeatedly shifting an array over doesn't have a noticeable cost, but I believe the numbers. Point taken. Just another Perler interested in Algol Programming.	[reply]


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