Add benchmarks for UnitSystem methods

[lipchev]

Added benchmarks for UnitSystem methods (UnitSystem.SI) in order to use as base line for comparison (I see there is a tool for that) with the modifications envisioned in #651

[lipchev]

BenchmarkDotNet=v0.11.5, OS=Windows 10.0.17763.737 (1809/October2018Update/Redstone5)
Intel Core i7-7820HQ CPU 2.90GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK=3.0.100-preview5-011568
[Host] : .NET Core 2.1.11 (CoreCLR 4.6.27617.04, CoreFX 4.6.27617.02), 64bit RyuJIT
DefaultJob : .NET Core 2.1.11 (CoreCLR 4.6.27617.04, CoreFX 4.6.27617.02), 64bit RyuJIT

Method	Mean	Error	StdDev	Median	Gen 0	Gen 1	Gen 2	Allocated
Constructor	9.043 ns	0.0459 ns	0.0429 ns	9.049 ns	-	-	-	-
Constructor_SI	423.813 ns	8.2875 ns	13.1449 ns	415.581 ns	0.0453	-	-	192 B
FromMethod	21.048 ns	0.1656 ns	0.1549 ns	21.083 ns	-	-	-	-
ToProperty	6.484 ns	0.1154 ns	0.0963 ns	6.452 ns	-	-	-	-
As	6.298 ns	0.1402 ns	0.1243 ns	6.336 ns	-	-	-	-
As_SI	404.015 ns	6.9181 ns	6.1327 ns	405.770 ns	0.0453	-	-	192 B
ToUnit	14.556 ns	0.0547 ns	0.0511 ns	14.561 ns	-	-	-	-
ToUnit_SI	418.968 ns	8.6850 ns	11.5942 ns	414.785 ns	0.0453	-	-	192 B
ToStringTest	1,769.903 ns	5.8755 ns	5.4959 ns	1,770.698 ns	0.1965	-	-	832 B
Parse	45,782.334 ns	913.8546 ns	2,099.7328 ns	45,941.022 ns	10.1929	-	-	43000 B
TryParseValid	43,719.197 ns	859.6624 ns	1,736.5605 ns	43,829.068 ns	10.1929	-	-	42976 B
TryParseInvalid	43,842.192 ns	87.9830 ns	77.9946 ns	43,860.654 ns	10.1318	-	-	42576 B
QuantityFrom	58.498 ns	0.6131 ns	0.5435 ns	58.505 ns	0.0132	-	-	56 B
IQuantity_As	13.341 ns	0.2962 ns	0.3955 ns	13.260 ns	0.0057	-	-	24 B
IQuantity_As_SI	405.592 ns	3.8216 ns	3.3878 ns	406.020 ns	0.0453	-	-	192 B
IQuantity_ToUnit	19.525 ns	0.4049 ns	0.3788 ns	19.683 ns	0.0133	-	-	56 B
IQuantity_ToStringTest	1,712.609 ns	11.4083 ns	10.1132 ns	1,712.467 ns	0.1945	-	-	832 B

[codecov-io]

Codecov Report

Merging #708 into master will not change coverage.
The diff coverage is n/a.

@@ Coverage Diff @@## master #708 +/- ##
=======================================
Coverage 58.32% 58.32% =======================================
Files 166 166 Lines 37811 37811 =======================================
Hits 22055 22055 Misses 15756 15756

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[angularsen]

Great, thanks!

[lipchev]

A quick note: the performance of the SI methods tested in this release are actually dependent on the quantity that is tested; here we test Length- which has ~ 30 UnitInfos (meter being in the middle), where for example VolumePerLength has only 3- thus it seems your result may vary (being slightly lower for most other quantities, on average):

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
Constructor	12.29 ns	0.2328 ns	0.2286 ns	-	-	-	-
Constructor_SI_VolumePerLength	327.59 ns	1.1634 ns	1.0883 ns	0.0453	-	-	192 B
Constructor_SI_Length	468.77 ns	10.6604 ns	14.9444 ns	0.0453	-	-	192 B

[angularsen]

Right. I don't recall the exact implementation for looking up the conversion functions from the top of my head, it has changed a few times lately, but I'm sure it can be improved. Maybe as simple as using a dictionary if we are not already using that.

[angularsen]

Release UnitsNet/4.39.0 · angularsen/UnitsNet