chore (Algebra.Basic): make RingHom.id and related declarations reducible
#9025
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Here are the benchmark results for commit ca5cf29. Benchmark Metric Change
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- build instructions 5.7%
- build simp 29.6%
- build wall-clock 8.2%
- ~Mathlib.Algebra.Lie.BaseChange instructions 2789.9%
- ~Mathlib.Algebra.Lie.Killing instructions 211.7%
- ~Mathlib.AlgebraicGeometry.ProjectiveSpectrum.Scheme instructions 52.3%
- ~Mathlib.Analysis.Calculus.LagrangeMultipliers instructions 383.8%
- ~Mathlib.Analysis.InnerProductSpace.Adjoint instructions 3.9%
- ~Mathlib.Analysis.NormedSpace.Extend instructions 154.7%
- ~Mathlib.Analysis.NormedSpace.Multilinear.Basic instructions 3.6%
- ~Mathlib.Analysis.SpecialFunctions.PolarCoord instructions 467.2%
- ~Mathlib.Analysis.SpecialFunctions.Pow.Deriv instructions 369.1%
- ~Mathlib.Data.Polynomial.Derivation instructions 131.0%
- ~Mathlib.Geometry.Manifold.Instances.Sphere instructions 5.0%
- ~Mathlib.LinearAlgebra.AffineSpace.AffineMap instructions 29.2%
- ~Mathlib.LinearAlgebra.Basis instructions 594.4%
- ~Mathlib.LinearAlgebra.BilinearForm.Hom instructions 52.9%
- ~Mathlib.LinearAlgebra.Matrix.BilinearForm instructions 304.7%
- ~Mathlib.LinearAlgebra.Matrix.SesquilinearForm instructions 217.5%
- ~Mathlib.LinearAlgebra.Prod instructions 159.5%
- ~Mathlib.RepresentationTheory.Character instructions 803.6%
- ~Mathlib.RepresentationTheory.GroupCohomology.Basic instructions 53.3%
- ~Mathlib.RepresentationTheory.GroupCohomology.Resolution instructions 2.9%
- ~Mathlib.RingTheory.PowerSeries.Basic instructions 28.8% |
eric-wieser
reviewed
Dec 13, 2023
Mathlib/Algebra/Algebra/Basic.lean
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| instance id : Algebra R R := | ||
| @[reducible] instance id : Algebra R R := |
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I thought the whole point in instance is that it's reducible enough for anything typeclass related?
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Apparently not
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Do you have a mwe to demo that?
(I agree with the principle behind the rest of this PR to change the non-instances to be reducible)
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Ah processing what you are saying now. You are correct, that is silly.
mattrobball
changed the title
Algebra.id, RingHom.id, MonoidHom.id reducible RingHom.id and related declarations reducible
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These instances often appear as parameters to typeclass instances that need to unify reducibly.