[great-users] runtime for crosslink creation increases exponentially

[Belschner, Tim]

Hello everybody,

 
we are facing a runtime issue with our GReAT transformations, if crosslinks are used extensively. Due to the fact, that the runtime for our affected transformations are increasing exponentially if the number of objects within their input models is raised linear, we did some timing measurements. The measurements were conducted with our specific as well as an example transformation with different input model sizes. Depending on the size, a single crosslink creation takes up to 9 seconds.

The problem’s source could be narrowed down to the crosslink creation within the effector ( e.g. “currMatch.matchContainer_4a.gl100dst()+= currMatch.element1_4c;“), but we struggled when examining it further on.

This is why we would like to ask if someone could have a look at it?

 
With the following link, we provide our example transformation and three input models. The transformation creates two kinds of crosslinks, between two objects of the same metamodel and between a metamodel and a temporary class defined in the transformation itself. The runtime issue occurs in both cases.

 
https://belschner.org/owncloud/index.php/s/95rn9A1AhvOqU7S

PW: GReAT

 
Thanks in advance and best regards

 
Tim

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