Implement _zeros and _ones utils

[mikeingold]

Changes

• Implements _zeros and _ones utility functions. These act like Base.zeros and Base.ones, respectively, but return NTuples to eliminate some allocations.
  • Improves performance for HAdaptiveCubature integrals, up to about 2.7x for particularly simple integrals.

Notes

• Originally included in Use a new _ParametricGeometry for specializations #131, but partitioned for scope management.

[github-actions]

Benchmark Results

	main	f1952e3...	main/f1952e3019cef7...
Differentials/Differential	0.241 ± 0.0019 μs	0.24 ± 0.0019 μs	1
Differentials/Jacobian	0.206 ± 0.001 μs	0.206 ± 0.001 μs	1
Integrals/Meshes.BezierCurve/Scalar GaussKronrod	23 ± 0.066 ms	23 ± 0.049 ms	1
Integrals/Meshes.BezierCurve/Scalar GaussLegendre	22 ± 0.063 ms	22 ± 0.059 ms	1
Integrals/Meshes.BezierCurve/Scalar HAdaptiveCubature	23.2 ± 0.086 ms	23.2 ± 0.047 ms	1
Integrals/Meshes.BezierCurve/Vector GaussKronrod	23 ± 0.054 ms	23 ± 0.057 ms	1
Integrals/Meshes.BezierCurve/Vector GaussLegendre	22 ± 0.054 ms	22 ± 0.034 ms	1
Integrals/Meshes.BezierCurve/Vector HAdaptiveCubature	23.2 ± 0.045 ms	23.2 ± 0.092 ms	1
Integrals/Meshes.Segment/Scalar GaussKronrod	1.19 ± 0.019 μs	1.38 ± 0.013 μs	0.865
Integrals/Meshes.Segment/Scalar GaussLegendre	0.0556 ± 0.0011 ms	0.0549 ± 0.00094 ms	1.01
Integrals/Meshes.Segment/Scalar HAdaptiveCubature	4.54 ± 0.07 μs	1.75 ± 0.067 μs	2.59
Integrals/Meshes.Segment/Vector GaussKronrod	3.48 ± 0.051 μs	3.45 ± 0.069 μs	1.01
Integrals/Meshes.Segment/Vector GaussLegendre	0.0682 ± 0.0011 ms	0.0671 ± 0.0011 ms	1.02
Integrals/Meshes.Segment/Vector HAdaptiveCubature	7.46 ± 0.15 μs	4.63 ± 0.086 μs	1.61
Integrals/Meshes.Sphere/Scalar GaussKronrod	0.0855 ± 0.00046 ms	0.0859 ± 0.0019 ms	0.995
Integrals/Meshes.Sphere/Scalar GaussLegendre	12.2 ± 0.12 ms	12.2 ± 0.14 ms	0.998
Integrals/Meshes.Sphere/Scalar HAdaptiveCubature	0.0633 ± 0.00042 ms	0.0603 ± 0.00028 ms	1.05
Integrals/Meshes.Sphere/Vector GaussKronrod	0.119 ± 0.001 ms	0.126 ± 0.0094 ms	0.938
Integrals/Meshes.Sphere/Vector GaussLegendre	13.6 ± 0.45 ms	13.7 ± 1.2 ms	0.988
Integrals/Meshes.Sphere/Vector HAdaptiveCubature	0.113 ± 0.0014 ms	0.11 ± 0.0013 ms	1.03
time_to_load	1.4 ± 0.016 s	1.39 ± 0.023 s	1.01

Benchmark Plots

A plot of the benchmark results have been uploaded as an artifact to the workflow run for this PR.
Go to "Actions"->"Benchmark a pull request"->[the most recent run]->"Artifacts" (at the bottom).

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.90%. Comparing base (1bccd58) to head (f1952e3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #135      +/-   ##
==========================================
+ Coverage   95.81%   95.90%   +0.08%     
==========================================
  Files          17       17              
  Lines         287      293       +6     
==========================================
+ Hits          275      281       +6     
  Misses         12       12              

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[JoshuaLampert]

Looks good. I only have one minor comment.

[JoshuaLampert]

Thanks!