There is a new feature in Acceleo 2.5. This feature allows users to profile the generation process of Acceleo. To activate the profiling you should check the profiling checkbox in the launch configuration of the chain.
The result of the profiling session is saved as a model, it's very useful for performance comparison (using EMF Compare) or report creation in batch environment (using Acceleo :) ).
Basicaly the model is the execution tree of Acceleo, each node being a step of the generation process. Those nodes give statistics like the time spent in the node and its subtree, the percentage of time it represents, and the number of times the element have been run by Acceleo. You can also find the list of EObjects for each node in the outline.
The model can be sorted by chronogical order or by the time spent as shown on the screenshot. It can help in the understanding of the generation process and finding the hotspot(s). Once this hotspot is found you can open the template editor on this element by double clicking it.
I am sure this will help to optimize your Acceleo templates.
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