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Improve getting matrix entries after permutation in _palp_PM_max() #35997

Merged
merged 12 commits into from
Jul 30, 2023
Merged

Improve getting matrix entries after permutation in _palp_PM_max() #35997

merged 12 commits into from
Jul 30, 2023

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xuluze
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@xuluze xuluze commented Jul 28, 2023 •
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Modify the _palp_PM_max() to obtain the matrix entry after permutation without make copy of the matrix. @mkoeppe

before

sage: %timeit -n 10 -r 3 o = lattice_polytope.cross_polytope(3); o._palp_PM_max();
36.8 ms ± 5.19 ms per loop (mean ± std. dev. of 3 runs, 10 loops each)

after

sage: %timeit -n 10 -r 3 o = lattice_polytope.cross_polytope(3); o._palp_PM_max();
4.88 ms ± 2.23 ms per loop (mean ± std. dev. of 3 runs, 10 loops each)

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  • The title is concise, informative, and self-explanatory.
  • The description explains in detail what this PR is about.
  • I have linked a relevant issue or discussion.
  • I have created tests covering the changes.
  • I have updated the documentation accordingly.

⌛ Dependencies

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mkoeppe commented Jul 28, 2023

Also add some before/after timings (use %time or %timeit) in the PR description please

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mkoeppe commented Jul 28, 2023 •
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I tried it out but it does not pass tests for me:
./sage -t --long src/sage/geometry/lattice_polytope.py

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xuluze commented Jul 28, 2023 via email

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mkoeppe approved these changes Jul 29, 2023
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Works for me, great improvement, thanks!

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Documentation preview for this PR (built with commit 2df0d10; changes) is ready! 🎉

@vbraun vbraun merged commit 79dc351 into sagemath:develop Jul 30, 2023
@mkoeppe mkoeppe added this to the sage-10.1 milestone Jul 30, 2023
@xuluze xuluze mentioned this pull request Aug 23, 2023
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vbraun pushed a commit to vbraun/sage that referenced this pull request Nov 27, 2023
sagemathgh-36031: Cythonize `LatticePolytope.normal_form(algorithm='p…
87c87e2 
…alp_native')`, change to default, add as a `Polyhedron` method

    
<!-- ^^^^^
Please provide a concise, informative and self-explanatory title.
Don't put issue numbers in there, do this in the PR body below.
For example, instead of "Fixes sagemath#1234" use "Introduce new method to
calculate 1+1"
-->
<!-- Describe your changes here in detail -->

<!-- Why is this change required? What problem does it solve? -->
The current default algorithm, using the external, unmaintained `palp`
package, is unreliable.

Here, as a follow-up on sagemath#35997, we make the reimplementation of the PALP
algorithm in Python (`palp_native`) suitable as the new default by
speeding it up.

We also fix a bug in introduced in sagemath#35997.

We also make it available as a method of `Polyhedron` (for base ring
`ZZ`).

@xuluze
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example "Fixes sagemath#12345". -->
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- [x] The title is concise, informative, and self-explanatory.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

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- sagemath#34567: ...
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URL: sagemath#36031
Reported by: Matthias Köppe
Reviewer(s): Dima Pasechnik, Frédéric Chapoton, Matthias Köppe
vbraun pushed a commit to vbraun/sage that referenced this pull request Dec 4, 2023
sagemathgh-36031: Cythonize `LatticePolytope.normal_form(algorithm='p…
cf99b51 
…alp_native')`, change to default, add as a `Polyhedron` method

    
<!-- ^^^^^
Please provide a concise, informative and self-explanatory title.
Don't put issue numbers in there, do this in the PR body below.
For example, instead of "Fixes sagemath#1234" use "Introduce new method to
calculate 1+1"
-->
<!-- Describe your changes here in detail -->

<!-- Why is this change required? What problem does it solve? -->
The current default algorithm, using the external, unmaintained `palp`
package, is unreliable.

Here, as a follow-up on sagemath#35997, we make the reimplementation of the PALP
algorithm in Python (`palp_native`) suitable as the new default by
speeding it up.

We also fix a bug in introduced in sagemath#35997.

We also make it available as a method of `Polyhedron` (for base ring
`ZZ`).

@xuluze
<!-- If this PR resolves an open issue, please link to it here. For
example "Fixes sagemath#12345". -->
<!-- If your change requires a documentation PR, please link it
appropriately. -->

### 📝 Checklist

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here to help! -->
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- [x] The title is concise, informative, and self-explanatory.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on
- sagemath#12345: short description why this is a dependency
- sagemath#34567: ...
-->

<!-- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
    
URL: sagemath#36031
Reported by: Matthias Köppe
Reviewer(s): Dima Pasechnik, Frédéric Chapoton, Matthias Köppe
vbraun pushed a commit to vbraun/sage that referenced this pull request Dec 5, 2023
sagemathgh-36031: Cythonize `LatticePolytope.normal_form(algorithm='p…
c31f22e 
…alp_native')`, change to default, add as a `Polyhedron` method

    
<!-- ^^^^^
Please provide a concise, informative and self-explanatory title.
Don't put issue numbers in there, do this in the PR body below.
For example, instead of "Fixes sagemath#1234" use "Introduce new method to
calculate 1+1"
-->
<!-- Describe your changes here in detail -->

<!-- Why is this change required? What problem does it solve? -->
The current default algorithm, using the external, unmaintained `palp`
package, is unreliable.

Here, as a follow-up on sagemath#35997, we make the reimplementation of the PALP
algorithm in Python (`palp_native`) suitable as the new default by
speeding it up.

We also fix a bug in introduced in sagemath#35997.

We also make it available as a method of `Polyhedron` (for base ring
`ZZ`).

@xuluze
<!-- If this PR resolves an open issue, please link to it here. For
example "Fixes sagemath#12345". -->
<!-- If your change requires a documentation PR, please link it
appropriately. -->

### 📝 Checklist

<!-- Put an `x` in all the boxes that apply. -->
<!-- If your change requires a documentation PR, please link it
appropriately -->
<!-- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
<!-- Feel free to remove irrelevant items. -->

- [x] The title is concise, informative, and self-explanatory.
- [ ] The description explains in detail what this PR is about.
- [x] I have linked a relevant issue or discussion.
- [ ] I have created tests covering the changes.
- [ ] I have updated the documentation accordingly.

### ⌛ Dependencies

<!-- List all open PRs that this PR logically depends on
- sagemath#12345: short description why this is a dependency
- sagemath#34567: ...
-->

<!-- If you're unsure about any of these, don't hesitate to ask. We're
here to help! -->
    
URL: sagemath#36031
Reported by: Matthias Köppe
Reviewer(s): Dima Pasechnik, Frédéric Chapoton, Matthias Köppe
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