iiinova — where your digital self keeps evolving

It seems, the closure instances are always set at the top of "locals init" section, regardless where do they appear. And that's the thing I didn't know until today, after 20 years :)

Here is even more simple example. In case of min = negative number, how much do you think the Run would allocate? You'd expect no allocation, but it will allocate for the closure (the DisplayClass).

Here, I reproduced it in a simple example. Anyhow, lesson learned. Never assume an "unreachable" code won't have any effect.

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Yep, it does the instantiation at the start of the method. What the hell? Why? This makes me re-evaluate my life :)

It's a closure, actually. I really have no idea why it would instate it beforehand.

None of the code will run. The first if covers all cases. Here, I fixed the issue by just creating a local function. Now I'm back to 0 allocs. It's weird. It means some of the closures of the dead code were instantiated somewhere at the beginning of the method? That breaks all my assumptions :)

Fati Iseni @fiseni.com · 13/06/2025

Ok, this caught me off guard. In our benchmarks, this section is dead code but adds allocations. If I comment out that section, I have 0 allocs. How does this unreachable section affect that? #dotnet #csharp

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I'm reading this spec. Yea, it's a bit fuzzy. There are some conflicting information. learn.microsoft.com/en-us/dotnet...

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Fati Iseni @fiseni.com · 13/06/2025

Who can shed some light here? What's the rationale for allowing internal methods in the interfaces? Once you have an internal method, consumers can no longer implement that interface. If they do not include it in their impl, it's a compiler error. But they can't include it either. #dotnet #csharp

Fati Iseni @fiseni.com · 13/06/2025

To try out the experience, for the whole week, I've been requesting PR reviews from Copilot on GitHub. While it can find some stupid and easy mistakes, for more complex code just spits out nonsense.

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Fati Iseni @fiseni.com · 03/06/2025

How many more modifiers can we have? #dotnet

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Fati Iseni @fiseni.com · 27/04/2025

Ok, I just sat down to sketch something quickly now. The idea would be to just install a NuGet dev dependency, and you'll be able to use Merge tags to indicate that deps should be merged to the current assembly. This is just the initial thought, still working on the idea.

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Fati Iseni @fiseni.com · 02/04/2025

I have zero grudge or anger towards the authors. Neither I think there is "rug-pulling" or whatever. I think the .NET Foundation should be reformed and have a different role in the ecosystem. Here are my thoughts posted as a picture :) #dotnet

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Fati Iseni @fiseni.com · 21/03/2025

Ok, I never bash people for sharing stuff, but this is really getting out of hand! What is this for the love of god? And hundreds of people chearing this post. #dotnet

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Fati Iseni @fiseni.com · 09/03/2025

I've been using a bash script for a long time. Having a dotnet tool would be more convenient.

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Fati Iseni @fiseni.com · 13/01/2025

Just for fun, I rewrote the implementation in C. Finally under 1 second (down from 42 minutes originally).

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Fati Iseni @fiseni.com · 09/12/2024

Sorry pal, but this is not correct and it's not a good advice. Yes, it should be used instead of .Result, but it doesn't save you from deadlocks. All it does, is to properly unwrap the exceptions.

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Fati Iseni @fiseni.com · 23/11/2024

I was just scrolling through X now, and it feels cringe, at best. This is how my timeline looks like. One man show 🤷‍♂️

Fati Iseni @fiseni.com · 17/11/2024

Comments for sure have value, as long as they describe the "why" or in cases where there is some subtle background story. Here is my example.

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Fati Iseni @fiseni.com · 17/11/2024

Going through the code now, and here is a simple example. The trimming might remove the interfaces here. So, you might need [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.Interfaces)] here But I'm in doubt too. Should we even do it for these types of libraries? I don't know.

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Fati Iseni @fiseni.com · 16/11/2024

I just found this. Almost 20 years ago, before a Megadeth concert. Damn, I got old.

Fati Iseni @fiseni.com · 16/11/2024

And they support all in this list. What sorcery is this?

Fati Iseni @fiseni.com · 14/11/2024

If you have a concrete collection, here is an allocation-free approach for GroupBy. It's quite verbose code, but it removed tons of allocations. #dotnet #aspnetcore

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Fati Iseni @fiseni.com · 14/11/2024

I do get it, I'm just being overdramatic here :) But I would lie if I said I love netstandard. The issues in old platforms are still present.

Fati Iseni @fiseni.com · 11/11/2024

I was using AI to generate cover images, and give appropriate credit :) But I have to stop doing that too. It looks weird.

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Fati Iseni @fiseni.com · 10/11/2024

This is my favorite use of collection expressions. I find myself using it all the time. What would have been multiple statements or annoyingly a long one; is perfectly succinct now. #dotnet #csharp

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Fati Iseni @fiseni.com · 10/11/2024

I just got a notification that you followed me there. Perhaps some automated actions. Just wanted to let you know.