dotnet/BenchmarkDotNet

Tomasz Kajetan Stańczak

@tkstanczak

also, is it possible to disable warnings?

liek this -> The minimum observed iteration time is 1.9000 us which is very smal
l. It's recommended to increase it.

the case here is that I know (more or less) what I am doing - I am trying to benchmark memory only and I do not care about the times

Tomasz Kajetan Stańczak

@tkstanczak

I know I can contribute :) but in case I can also make a comment that maybe you can place the table after the warnings and after the legend so there would be no need to scroll up after the benchmark run

the legend is only needed for the users at the beginning, warnings too, and then you often would run a benchmark and want to see the results after it finishes

I end up scrolling up and looking for tables after each run

Stephan Grein

@stephanmg

hey folks.

is there any update on the possibility to use BenchmarkDotNet with Unity?

Arunprasath

@csearun

While migrating webapplication from .netcore 2.1 to .netcore 3.1, I am getting runtime exception as

System.InvalidOperationException: 'The CORS protocol does not allow specifying a wildcard (any) origin and credentials at the same time. Configure the CORS policy by listing individual origins if credentials needs to be supported.'
How to resolve System.InvalidOperationException?

TeBeCo

@tebeco

not sure you're in the good channel here, it does'nt seems related to benchmark at all

Tebjan Halm

@tebjan

Hi, is there any guide on how to do a benchmark programmatically?

without using attributes... just: start measure (with params), do something (several times), stop, get results

TeBeCo

@tebeco

the idea of attribute i suppose is to avoid the buggy measure you would have by dirrectly calling code

because you would have to warmup stuff and so on

Tebjan Halm

@tebjan

the problem is, i am in an environment that doesn't do static compilation/reflection. it's a live-programming environment that does compilation at runtime: https://visualprogramming.net/

so I can call warm-up things myself, if necessary

TeBeCo

@tebeco

why not generate code with the attrbutes then ?

do you want bench or metrics ?

that's 2 different thing

also you could open https://github.com/dotnet/BenchmarkDotNet
and try to extract the logic you're looking for

that might exists, i never took a look at it to be fair

Tebjan Halm

@tebjan

yes, that would by my fallback strategy, I was hoping there was some kind of guide or example somewhere

TeBeCo

@tebeco

maybe opening an issue on the repo itself as a [QUESTION] ....
including details about your context and limitation might help you have a cleaner answer

Tebjan Halm

@tebjan

yes, thanks

TeBeCo

@tebeco

https://benchmarkdotnet.org/articles/overview.html

i wonder if you could find something here

if you get an answer on that i'll be curoius ^^

Tebjan Halm

@tebjan

@tebeco i've created an issue: dotnet/BenchmarkDotNet#1445

Sebastiano Mandalà

@sebas77

Jumping in quickly to ask what config you would suggest me to use to have fast benchmark iterations without the result being meaningless. Running a benchmark on simple code takes minutes

Jason Bock

@JasonBock

I just tried to create a couple of benchmark tests, and....I got this error:

error MSB4086: A numeric comparison was attempted on "$(LangVersion)" that evaluates to "latest" instead of a number, in condition "'$(LangVersion)' == '' Or '$(LangVersion)' < '7.3'".

I've never seen that one before :). Any ideas why I'm getting this, and how to get rid of it?

Jason Bock

@JasonBock

Seems like if I have <LangVersion> set to latest, that's why I'm getting that error. Sounds like a bug to me. I'll submit something to the GitHub issues list.

TeBeCo

@tebeco

Bad idea of the day ....
Can BenchmarkDotnet do bisect so that we could detect threshold in the code,

[BisectParam]
public ValueTuple<int, int> RequestSize = (8, 4096)

[Benchmarck]
[BisectPivot(MemoryDiagnosterResult.Gen0)]
public void Foo()
{
  //Code will run with 
  // 0 => Alloc ?
  // 4096  => Alloc ?
   // (4096-0)/2 => Alloc ?
  // ....
}

i'm not sure if that would makes any sense to be fair

it would be a bit like a FlatMap/Reduce

Florian Verdonck

@nojaf

Hello

I created my first benchmark today and now I'm wondering what to do with it.
How many times do I want to run it? And what is the best strategy for saving the results after a CI build?
Because I guess you want to compare the results with previous runs, so what is the best way to do that.

Eugene Krapivin

@EugeneKrapivin

Hey guys!
is there a support planned for TeamCity? storing the files and comparing between builds and presenting the delta?
Thanks!

VittenaDev007

@VittenaDev007

I automatic create word document in server side
I use microsoft.introp.word not working on IIS
show this error
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean wrapExceptions, Boolean& canBeCached, RuntimeMethodHandleInternal& ctor, Boolean& hasNoDefaultCtor) at System.RuntimeType.CreateInstanceDefaultCtorSlow(Boolean publicOnly, Boolean wrapExceptions, Boolean fillCache) at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, Boolean wrapExceptions) at System.Activator.CreateInstance(Type type, Boolean nonPublic, Boolean wrapExceptions)
please help me

DrGriff

@DrGriff

Hi everyone. I created a Visual Studio Console project for benchmarking, and ran this just fine (by doing Ctrl+F5 to run it without the debugger). I then tried using the command line (as Adminstrator) c:\.......\myapp.exe and I got the following error: Generate Exception: Access to the path 'C:\WINDOWS\system32\LogFiles\WMI\RtBackup' is denied.. What am I missing?

1 reply

Johannes Rössel [yWorks]

@jroessel

Good morning; I've got a bit of a problem with a ParamsSource that requires STA. It seems as if the parameters are queried at a point where the STAThread attribute of the benchmark (for understandable reasons, actually) is not yet "active". Right now I'm working around this by using the parameter as string and then using reflection in a GlobalSetup method to pick the correct instance, but is there a nicer way? Attributing the method that's called for ParamsSource with STAThread doesn't help either. In my case I'd be fine if everything ran with STA anyway, so some global option would also be okay.

gpetrou

@gpetrou

Is it possible to Setup some code only once per assembly, not per test method as GlobalSetup does?
Similarly, is it possible to initialize some code per class?
We have some third party libraries that can only be initialized/terminated once and we also generate some data that should be shared between tests.

Johannes Rössel [yWorks]

@jroessel

@gpetrou Wouldn't a static initializer of any type that's used in benchmarks do the trick?

gpetrou

@gpetrou

@jroessel I assume you are talking about the code per class case? I will check that. But assuming that this will work, how can Cleanup happen once per class or assembly?

Ivan Kochurkin

@KvanTTT

Hi! Is it possible to export to csv raw nanoseconds 18 instead of formatted form like 0.0184 ms?

Reason: I'm comparing several runtimes and need in normalized benchmark time.

Adam Sitnik

@adamsitnik

hi @KvanTTT SummaryStyle is what you are looking for

var summaryStyle = new SummaryStyle
{
    PrintUnitsInHeader = true,
    PrintUnitsInContent = false,
    SizeUnit = SizeUnit.B,
    TimeUnit = TimeUnit.Nanosecond
};

config = config.With(summaryStyle);

Ivan Kochurkin

@KvanTTT

Yes, I've already found it, but thank you! :thumbsup:

Jason Bock

@JasonBock

Is there any way to run a project with benchmark tests where LangVersion is set to preview? I want to test some stuff I'm writing for .NET 5.0 and I need to use C# 9 features, but when I have preview in play, I get:

error MSB4086: A numeric comparison was attempted on "$(LangVersion)" that evaluates to "preview" instead of a number, in condition "'$(LangVersion)' == '' Or '$(LangVersion)' < '7.3'".

Jason Bock

@JasonBock

Nevermind....I set it to 9.0 and apparently that worked :)

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