paper on OO performance with gfortran

[Paul Richard Thomas]

Dear Damian,

That is fascinating. The fact that g++ is issuing SMD instructions and
gfortran is not is concerning. Funnily enough, I have just started
looking into precisely this area and so will follow it up.

Parameterized Derived Types are much, much more complicated to
implement than I ever imagined. Unexpectedly relative to my first
thoughts, it is the KIND parameters that are troublesome because of
the need to generate separate instances of the derived type for each
value(s) of the KIND parameter(s), using the original declaration as a
template. I am going to raise the question fairly soon as to how to
name these instances.... Were there only LEN parameters,
implementation would be very straight forward.

Cheers

Paul

On 10 August 2015 at 20:40, Damian Rouson <damian@sourceryinstitute.org> wrote:
> All,
>
> In case it’s of interest to you, the following paper provides some performance data based on compiling
> object-oriented code with gfortran and comparing the performance of similar code in C++ and java:
>
> http://airccse.org/journal/ijsea/papers/5314ijsea03.pdf
>
> Damian



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