Improved Shell benchmark

[pictos]

Description of Change

The benchmark method name GoTo passes the idea that we want to measure the Shell Navigation, but we're measuring more than that.

At this PR I moved the Shell initialization to a global method, to make sure that the benchmark will measure just the GoToAsync method. Before this change, the benchmark was measuring the shell initialization + navigation.

Main branch

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.22000
Intel Core i5-10500H CPU 2.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET Core SDK=6.0.300-preview.22204.3
  [Host]     : .NET Core 6.0.4 (CoreCLR 6.0.422.16404, CoreFX 6.0.422.16404), X64 RyuJIT
  DefaultJob : .NET Core 6.0.4 (CoreCLR 6.0.422.16404, CoreFX 6.0.422.16404), X64 RyuJIT

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
GoTo	66.74 μs	0.569 μs	0.475 μs	8.9111	0.7324	-	54.64 KB

This branch

BenchmarkDotNet=v0.12.1, OS=Windows 10.0.22000
Intel Core i5-10500H CPU 2.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET Core SDK=6.0.300-preview.22204.3
  [Host]     : .NET Core 6.0.4 (CoreCLR 6.0.422.16404, CoreFX 6.0.422.16404), X64 RyuJIT
  DefaultJob : .NET Core 6.0.4 (CoreCLR 6.0.422.16404, CoreFX 6.0.422.16404), X64 RyuJIT

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
GoTo	10.01 μs	0.128 μs	0.120 μs	1.6479	-	-	10.1 KB

As you can see the values changed a lot, indicating that we are measuring more than the navigation.

Issues Fixed

There's no issue for this, I can create one if needed.

[jonathanpeppers]

At the time I wrote this benchmark, I was actually trying to make new Shell() faster...

This change is fine, though. 👍

[pictos]

If you want I can create another PR to benchmark it. I've been working on some changes on GoToAsync to improve perf. and refactoring this way will be good to have a better notion about the changes.

[jonathanpeppers]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).