On 08/23/2012 09:10 AM, Uri Guttman wrote:
> On 08/23/2012 02:54 AM, Salvador Fandino wrote:
>
>>>
>>> It's a pity Sort::Maker not in Debian
>>
>> There is also Sort::Key, available in Debian testing and unstable, and
>> which is usually faster than Sort::Maker and also Sort::Key::Radix, even
>> faster when sorting by numeric keys but not available in Debian.
>>
>> use Sort::Key qw(ukeysort);
>>
>> my @sorted = ukeysort { /^(\d+)-(\d+)/
>> or die "bad key $_";
>> $1 * 100 + $2 } @data;
>>
>>
>> The 'u' prefix in 'ukeysort' specifies that the sorting key is an
>> unsigned integer.
>
> you are comparing apples and oranges.
I don't thing so. I am comparing two modules that generate sorters. The
may have different APIs, but at the functional level they are the same
thing.
> your module provides numerous
> specialized sort subs (like php does) which means the coder has to
> remember or lookup what each one does. i counted at least 32 similarly
> names subs which is very confusing.
Actually Sort::Key provides both, you can choose between the
Sort::Key::Maker declarative API that allows to create multi-key sorting
subs and the prebuild mono-key sorters from Sort::Key (and also, the
jit-build multi-key sorters of Sort::Key::Multi).
> having a single sub with a flexible api is a much better interface.
Well, it depends, the flexible API of Sort::Maker results in code that's
probably more legible and easy to understand without reading the module
documentation first.
On the other hand, using the pre-build sorters from Sort::Key results in
more concise and simpler code. If you need to include sorting operations
in your code frequently you get to appreciate that.
> your claim for it being faster needs backing with benchmarks with
> multiple keys. single key sorts are fast with just the sort function as
> is. since your multikey sorts must use a map/sort/map method, again
> showing how they are faster then the GRT would be interesting.
IIRC, a long time ago I send you a patch for Sort::Maker benchmarking
script incorporating Sort::Key variants that showed how faster my module
can be. I would try to find it and send it to you again.
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