Source code for Dotnet code generation overview by example

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19043.1237 (21H1/May2021Update)
Intel Core i7-8550U CPU 1.80GHz (Kaby Lake R), 1 CPU, 8 logical and 4 physical cores
.NET SDK=5.0.401
  [Host]     : .NET 5.0.10 (5.0.1021.41214), X64 RyuJIT
  DefaultJob : .NET 5.0.10 (5.0.1021.41214), X64 RyuJIT

Generation of parser

Method	Mean	Error	StdDev	Gen 0	Gen 1	Gen 2	Allocated
EmitIl	22.02 μs	0.495 μs	1.429 μs	1.2817	0.6409	0.0305	5 KB
ExpressionTree	683.68 μs	13.609 μs	31.268 μs	2.9297	0.9766	-	14 KB
Sigil	642.63 μs	12.305 μs	29.243 μs	112.3047	-	-	460 KB
Roslyn	71,605.64 μs	2,533.732 μs	7,350.817 μs	1000.0000	-	-	5,826 KB

Invocation of parser

Method	Mean	Error	StdDev	Ratio	RatioSD	Gen 0	Allocated
EmitIl	374.7 ns	7.75 ns	22.36 ns	1.02	0.08	0.0095	40 B
ExpressionTree	378.1 ns	7.56 ns	20.57 ns	1.03	0.08	0.0095	40 B
Reflection	13,625.0 ns	272.60 ns	750.81 ns	37.29	2.29	0.7782	3,256 B
Sigil	378.9 ns	7.69 ns	21.06 ns	1.03	0.07	0.0095	40 B
Roslyn	404.2 ns	7.55 ns	17.80 ns	1.10	0.07	0.0095	40 B
SourceGenerator	384.4 ns	7.79 ns	21.46 ns	1.05	0.08	0.0095	40 B
ManuallyWritten	367.8 ns	7.36 ns	15.68 ns	1.00	0.00	0.0095	40 B