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Feature/parallel in time optimization

Issue/feature addressed

Optimization was disable for Parallel-in-Time simulation. This MR provide a full implementation of optimization for Parallel-in-Time support.

Proposed solution

Update CollectionOptimization to independently optimizing for each time level. This is achieved by using a map of a map with the time level as a key parameter. If a time level is missing from the optfile, then only the missing time level will be updated.


A more detailed description of the changes. Please include any details necessary for reviewers to understand your work, and point out particular points would like them to pay particular attention to.


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  • Functions and classes, or changes to them, are documented.
  • [ ] User guide/documentation is updated.
  • Changelog is updated.
  • [ ] Suitable tests added for new functionality.
  • Contributed code is correctly formatted. (See the contributing guidelines).
  • [ ] License added to any new files.
  • No extraneous files have been added (e.g. compiler output or test data files).
Edited by Jacques Xing

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