Decimal type added and Project Benchmarks added

[hugobritobh]

• Decimal type added

• Project Benchmarks added (with BenchmarkDotNet)

• IsNumber: code is more readable and this method is faster than Switch

• Contains for AttributeSyntax. Example: [assembly: JsonSrcGen.JsonArray(typeof(int))]

• Update packages Microsoft.CodeAnalysis.Analyzers (3.3.1) Microsoft.NET.Test.Sdk (16.8.0) NUnit3TestAdapter" Version (3.17.0)

Unit Tests Outcomes 347 Passed 4 Failed (It seems that an error occurred just for me, so it could be a time zone) Do some testing with internationalization (Example: DecimalPropertyTests)

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:white_check_mark: hugobritobh
:x: Hugo de Brito Valadares Rodrigues Alves

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[trampster]

Nice Work :)

Just few minor things:

• Please remove the commented code.
• Did you benchmark the IsNumber change? I wonder if we should put MethodImplAttributes.AggressiveInlining on it.
• You need to accept the CLA before I can accept your merge request.

[trampster]

I tried benchmarking the IsNumber method vs the Switch statement and the switch statement is a little faster. (inlining didn't make any difference.)

Method	Mean	Error	StdDev
IsNumberMethod	21.15 ns	0.034 ns	0.028 ns
IsNumberInlineMethod	21.36 ns	0.079 ns	0.074 ns
SwitchStatement	15.78 ns	0.050 ns	0.045 ns

The benchmark code is here: https://gist.github.com/trampster/117692f09168f262a995b7bb95db29a9

switch statements like this can be compiled into a jump table, which can be executed in a jump instruction. This can beat a two comparisons method like is required in IsNumber.

I think we should leave the switch statements in.

[hugobritobh]

I tried benchmarking the IsNumber method vs the Switch statement and the switch statement is a little faster. (inlining didn't make any difference.)

Method Mean Error StdDev IsNumberMethod 21.15 ns 0.034 ns 0.028 ns IsNumberInlineMethod 21.36 ns 0.079 ns 0.074 ns SwitchStatement 15.78 ns 0.050 ns 0.045 ns The benchmark code is here: https://gist.github.com/trampster/117692f09168f262a995b7bb95db29a9

switch statements like this can be compiled into a jump table, which can be executed in a jump instruction. This can beat a two comparisons method like is required in IsNumber.

I think we should leave the switch statements in.

It could be something from my processor. So, I even made a project for people to test: BenchmarksNumber