perf: add some fast_instance%

[kbuzzard]

This PR adds some fast_instance%s, which tidies up some terms.

See #mathlib4 > fast_instance% plans for explicit descriptions of what every change in this PR actually does to the terms in question.

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[kbuzzard]

!radar

[leanprover-radar]

Benchmark results for dbbfd1a against 88330eb are in. No significant results found. @kbuzzard

• ✅ build//instructions: -34.2G (-0.02%)

No significant changes detected.

[github-actions]

PR summary dbbfd1a2fe

Import changes for modified files

Dependency changes

File	Base Count	Head Count	Change
Mathlib.Algebra.Group.Pi.Basic	107	108	+1 (+0.93%)
Mathlib.Algebra.Group.TypeTags.Basic	135	136	+1 (+0.74%)

Import changes for all files

Files

Import difference

52 files Mathlib.Algebra.Divisibility.Prod Mathlib.Algebra.EuclideanDomain.Int Mathlib.Algebra.FreeMonoid.Count Mathlib.Algebra.Group.Action.Basic Mathlib.Algebra.Group.Action.End Mathlib.Algebra.Group.Action.Hom Mathlib.Algebra.Group.Action.Pretransitive Mathlib.Algebra.Group.Action.Prod Mathlib.Algebra.Group.Action.TypeTags Mathlib.Algebra.Group.Conj Mathlib.Algebra.Group.End Mathlib.Algebra.Group.Equiv.TypeTags Mathlib.Algebra.Group.Even Mathlib.Algebra.Group.Int.Even Mathlib.Algebra.Group.Int.TypeTags Mathlib.Algebra.Group.Irreducible.Lemmas Mathlib.Algebra.Group.Nat.Even Mathlib.Algebra.Group.Nat.Hom Mathlib.Algebra.Group.Nat.TypeTags Mathlib.Algebra.Group.Pi.Basic Mathlib.Algebra.Group.Pi.Units Mathlib.Algebra.Group.TypeTags.Basic Mathlib.Algebra.Group.TypeTags.Hom Mathlib.Algebra.GroupWithZero.Action.Basic Mathlib.Algebra.GroupWithZero.Action.End Mathlib.Algebra.GroupWithZero.Action.Prod Mathlib.Algebra.GroupWithZero.Associated Mathlib.Algebra.GroupWithZero.Conj Mathlib.Algebra.GroupWithZero.Pi Mathlib.Algebra.GroupWithZero.ProdHom Mathlib.Algebra.GroupWithZero.Prod Mathlib.Algebra.GroupWithZero.WithZero Mathlib.Algebra.Module.Prod Mathlib.Algebra.Order.Group.Abs Mathlib.Algebra.Order.Group.MinMax Mathlib.Algebra.Order.Group.PosPart Mathlib.Algebra.Order.Group.Unbundled.Abs Mathlib.Algebra.Order.Group.Unbundled.Int Mathlib.Algebra.Order.Hom.Basic Mathlib.Algebra.Order.Hom.TypeTags Mathlib.Algebra.Order.Monoid.Associated Mathlib.Algebra.Order.Monoid.TypeTags Mathlib.Algebra.Order.Monoid.Unbundled.TypeTags Mathlib.Algebra.Order.Ring.Unbundled.Rat Mathlib.Algebra.Order.Sub.Basic Mathlib.Algebra.Prime.Lemmas Mathlib.Algebra.Ring.WithZero Mathlib.Control.Fix Mathlib.Data.FunLike.Group Mathlib.Data.List.Prime Mathlib.Data.Matrix.DMatrix Mathlib.Data.Nat.Upto

1

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Declarations diff

No declarations were harmed in the making of this PR! 🐙

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

## summary with just the declaration names:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

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No changes to strong technical debt.

No changes to weak technical debt.

[mathlib-merge-conflicts]

This pull request has conflicts, please merge master and resolve them.