#14516: Refactoring of crystals for speedup
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Reporter: tscrim | Owner:
sage-combinat
Type: enhancement | Status:
needs_review
Priority: major | Milestone:
sage-5.10
Component: combinatorics | Resolution:
Keywords: crystals speedup | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Travis Scrimshaw | Merged in:
Dependencies: #2023 #14402 #14413 #14143 #14573 | Stopgaps:
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Description changed by tscrim:
Old description:
> In order to speed up many of the crystals computations, I'm proposing the
> following:
>
> - Cythonize `CrystalOfLetters`
> - Instead of `e()`, `f()`, `epsilon()`, `phi()` checking the index set
> each time, these functions will check to make sure i is in the index set,
> then call `_e()`, `_f()`, `_epsilon()`, `_phi()` which assume i is valid
> input and respectively call the private methods.
> - Make `index_set()` a cached method. Subsequently this requires it to be
> returned as a tuple instead of a list
> - Make different letters classes, one for integers (classical types), one
> for tuples (exceptional/spin)
> - Store by caching result of `_element_constructor_()` the elements of
> `CrystalOfLetters`.
New description:
In order to speed up many of the crystals computations, I'm proposing the
following:
- Cythonize `CrystalOfLetters`
- Make `index_set()` a cached method. Subsequently this requires it to be
returned as a tuple instead of a list
- Make different letters classes, one for integers (classical types), one
for tuples (exceptional/spin)
- Store by caching result of `_element_constructor_()` the elements of
`CrystalOfLetters`.
See #14686 for a followup.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14516#comment:4>
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