Improve performance

[wixette]

Benchmark howto:

dotnet run -p ISB.Benchmark -c Release

As of the commit 024c7b7 :

BenchmarkDotNet=v0.13.1, OS=macOS Big Sur 11.5.2 (20G95) [Darwin 20.6.0]
Intel Xeon CPU E5-1650 v2 3.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=5.0.300
[Host] : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT
DefaultJob : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT

Method	Mean	Error	StdDev
Compile	89.10 us	1.736 us	2.489 us
Run	2,117.31 us	31.815 us	29.760 us
RunWithLibCall	13,016.36 us	255.537 us	262.418 us

[wixette]

With the commit of eb5cffa :

BenchmarkDotNet=v0.13.1, OS=macOS Big Sur 11.5.2 (20G95) [Darwin 20.6.0]
Intel Xeon CPU E5-1650 v2 3.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=5.0.300
[Host] : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT
DefaultJob : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT

Method	Mean	Error	StdDev
Compile	64.68 us	0.199 us	0.176 us
Run	2,062.07 us	11.140 us	9.875 us
RunWithLibCall	4,717.63 us	13.144 us	10.976 us

[wixette]

(Added a new benchmark)

Without the commit 1be44fd

BenchmarkDotNet=v0.13.1, OS=macOS Big Sur 11.6 (20G165) [Darwin 20.6.0]
Intel Xeon CPU E5-1650 v2 3.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=5.0.300
[Host] : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT
DefaultJob : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT

Method	Mean	Error	StdDev
Compile	65.09 us	0.164 us	0.137 us
Run	2,054.25 us	4.859 us	4.308 us
RunWithLibCall	4,966.69 us	14.985 us	13.284 us
RunPrimeChecking	364.22 us	0.580 us	0.514 us

With the comit 1be44fd

BenchmarkDotNet=v0.13.1, OS=macOS Big Sur 11.6 (20G165) [Darwin 20.6.0]
Intel Xeon CPU E5-1650 v2 3.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=5.0.300
[Host] : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT
DefaultJob : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT

Method	Mean	Error	StdDev
Compile	65.63 us	0.250 us	0.221 us
Run	1,993.80 us	13.974 us	12.387 us
RunWithLibCall	4,818.23 us	11.906 us	9.295 us
RunPrimeChecking	345.88 us	1.107 us	0.924 us

[wixette]

With the commit 000d29f

BenchmarkDotNet=v0.13.1, OS=macOS Big Sur 11.6 (20G165) [Darwin 20.6.0]
Intel Xeon CPU E5-1650 v2 3.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=5.0.300
[Host] : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT
DefaultJob : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT

Method	Mean	Error	StdDev
Compile	67.07 us	0.179 us	0.150 us
Run	1,824.45 us	4.263 us	3.987 us
RunWithLibCall	4,742.75 us	12.672 us	10.582 us
RunPrimeChecking	320.35 us	0.656 us	0.582 us

With the commit e38574e

BenchmarkDotNet=v0.13.1, OS=macOS Big Sur 11.6 (20G165) [Darwin 20.6.0]
Intel Xeon CPU E5-1650 v2 3.50GHz, 1 CPU, 12 logical and 6 physical cores
.NET SDK=5.0.300
[Host] : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT
DefaultJob : .NET 5.0.6 (5.0.621.22011), X64 RyuJIT

Method	Mean	Error	StdDev
Compile	66.58 us	0.745 us	0.697 us
Run	1,870.69 us	6.084 us	5.080 us
RunWithLibCall	4,584.93 us	12.776 us	11.951 us
RunPrimeChecking	322.01 us	0.499 us	0.417 us