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Kevin Gosse @kevingosse.net · 2d

I just published a new article: Using profiler function hooks in .NET with Silhouette.
In the process, we also learn how to use static linking with NativeAOT.

minidump.net/using-functi...

Using profiler function hooks in .NET with Silhouette

In this article, we see what are function hooks, and how to use them in .NET with Silhouette. We also learn how to statically link a library with NativeAOT.

minidump.net

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Reposted by Kevin Gosse

Bruce Dawson @randomascii.bsky.social · 13d

New blog post:
In 2021 I found an invisible memory leak in a tool (VS Code) that I have never used. Impossible? Easy:
randomascii.wordpress.com/2025/10/09/f...

Finding a VS Code Memory Leak

In 2021 I found a huge memory leak in VS code, totalling around 64 GB when I first saw it, but with no actual limit on how high it could go. I found this leak despite two obstacles that should have…

randomascii.wordpress.com

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Kevin Gosse @kevingosse.net · 26d

Another way to illustrate: here, CallMe is able to extract the string "hello" even though it feels like it shouldn't be able to.

Kevin Gosse @kevingosse.net · 26d

True! I never realized before seeing your post.

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Kevin Gosse @kevingosse.net · 27d

If you have trouble understanding what's going on, have a look at the decompiled code. `Test` allocates a single closure for the calls to `CallMe1` and `CallMe2`.

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Kevin Gosse @kevingosse.net · 27d

There's an even more adverse effect to the way closures are allocated:
sharplab.io#v2:EYLgxg9gT...

Because the same closure is reused for different calls, you can end up extending the lifetime of some of your objects without realizing it.

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Kevin Gosse @kevingosse.net · 29d

Looks like some people took the matter very seriously 😅 medium.com/@alexleybour...

The How to bulk download Slack emojis 💾

How to bulk download all of your slack emojis and automatically rename them all using Automator and AppleScript.

medium.com

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Kevin Gosse @kevingosse.net · 29d

Top thing I wish I had known earlier as a software engineer: before leaving a company, make sure to download your favorite slack emojis, so you don't have to frenetically look for them on the web when you realize they're missing from the new slack.

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Kevin Gosse @kevingosse.net · Sep 22

Worked at Datadog, encountered crashes because of mysterious race-conditions in .NET writeable metadata: github.com/dotnet/runti...

Moved to JetBrains, encountered crashes because of mysterious race-conditions in .NET writeable metadata: github.com/dotnet/runti...

I think I'm cursed.

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Kevin Gosse @kevingosse.net · Sep 18

As requested, I published an article about how the UI profiler works: minidump.net/measuring-ui...
It allows me to measure the responsiveness of Visual Studio when running with ReSharper, in various conditions.

I also made the source code available on github: github.com/kevingosse/U...

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Kevin Gosse @kevingosse.net · Sep 18

See the quoted thread 🙂
bsky.app/profile/kevi...

Kevin Gosse @kevingosse.net · Jul 23

As I work on Resharper performance, I learn about limitations of .NET (at least, .NET Framework) that I wasn't aware of. Here, I shaved 1 second of CPU time on startup by... removing a call to Array.Empty<T>.

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Kevin Gosse @kevingosse.net · Sep 10

Was it 2025.2.1? 🤔

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Kevin Gosse @kevingosse.net · Sep 10

Congrats to Microsoft on this new release, I've been using it for a few weeks now and it really feels great.

Note that Resharper is already compatible, if you want to try it!

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Kevin Gosse @kevingosse.net · Sep 3

Not entirely sure what I'm going to do with all that money.

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Kevin Gosse @kevingosse.net · Sep 1

I just discovered that whenever you create a closure in a generic C# method, the closure is also generic even when it's not needed.

This is very frustrating to me because generics cause performance issues in Resharper (see bsky.app/profile/kevi...)

sharplab.io#v2:EYLgxg9gT...

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Kevin Gosse @kevingosse.net · Sep 1

It's trying hard

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Kevin Gosse @kevingosse.net · Sep 1

Yeah, gonna be one of those days.

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Kevin Gosse @kevingosse.net · Sep 1

Monday

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Kevin Gosse @kevingosse.net · Aug 29

Try Warp 😉

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Kevin Gosse @kevingosse.net · Aug 28

I can't recommend strongly enough to use an unlimited online backup service (I use @backblaze.bsky.social). Backup your whole disk and forget about it.
Just today, I realized I lost some code I wrote months ago (~2 days of work). Painlessly restored it from the automatic backup.

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Kevin Gosse @kevingosse.net · Jul 28

Some of the work might end up impacting Rider as a large part of the codebase is shared, but yeah my main focus right now is Resharper 😅

Kevin Gosse @kevingosse.net · Jul 28

For reference, when running the same test with vanilla VS (no extensions), the cumulated duration of freezes is ~6 seconds. It means Resharper is still adding ~3 seconds even in out-of-process mode. We will try our best to reduce it further in the upcoming versions.

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Kevin Gosse @kevingosse.net · Jul 28

In this test, a freeze is arbitrarily defined as "VS didn't process user input during 100 ms", which is a very aggressive threshold.
The Orchard Core solution is used (github.com/OrchardCMS/O...).
The counter starts at ~5 seconds because it counts the splash screen.

GitHub - OrchardCMS/OrchardCore: Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that frame...

Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that framework. - OrchardCMS/OrchardCore

github.com

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Kevin Gosse @kevingosse.net · Jul 28

To help reduce the number of UI freezes caused by Resharper, I built an internal tool to measure UI responsiveness.
Here, you can see the improvement between the current 2025.1 version (on the left) and the upcoming 2025.2 version (on the right) with out-of-process enabled.

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Kevin Gosse @kevingosse.net · Jul 23

If I trust this comment, it's because with NGEN, generic type specializations can live in a different assembly. So when resolving a generic, .NET scans the assemblies to deduplicate them.
github.com/dotnet/corec...

github.com

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