@SitnikAdam

Open Source contributor, #BenchmarkDotNet maintainer. My job on .NET Team is to make the .NET Core the fastest developer platform on the planet.

 Gdańsk, Poland
adamsitnik.com
Joined December 2014
  • Tweets2.9K
  • Following346
  • Followers6.7K
216Media
Adam Sitnik retweeted
Ibro
@axeng200Oct 15
When in doubt, just use C# and ASP.NET Core. It's blazing fast. .NET 11 RC2 is even faster. For me, it's the best overall major web framework - auth, config, logging, perf, modular middleware, DI, cross-plat, etc. But I didn't expect this:
DHH
@dhhOct 8
Campfire rewrite journey continues. I let the clankers run for a day, go through all the PRs that were submitted, verify the work, merge what was ready, and then ask it to bring all architectural improvements to each implementation. Good old C is now in the lead!
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Przepraszam wszystkich najmocniej, ale muszę odwołać moją dzisiejszą prezentację (syn dostał zapalenia ucha i muszę ugasić ten pożar).
Adam Sitnik@SitnikAdamOct 12
Zapraszam wszystkich z Trójmiasta i okolic na moją prezentację w środę na TG.NET gdzie opowiem o zmianach które wprowadziliśmy w Process w .NET 11. meetup.com/pl-pl/tg-net/even…
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Zapraszam wszystkich z Trójmiasta i okolic na moją prezentację w środę na TG.NET gdzie opowiem o zmianach które wprowadziliśmy w Process w .NET 11. meetup.com/pl-pl/tg-net/even…
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Adam Sitnik retweeted
dodyg@dodygOct 7
It's faster. It's not rewritten in Rust.
Drew Noakes@drewnoakesOct 6
We are making large changes to C# Dev Kit, so it's faster and lighter than ever before. It's available in pre-release today. Here's a blog post with more information: devblogs.microsoft.com/dotne…

A faster, lighter C# Dev Kit - .NET Blog

C# Dev Kit has been rebuilt to open solutions in about a second and run on a fraction of the memory, and this post walks through what changed for you.

devblogs.microsoft.com
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PolyType v2.0.0-rc.1 includes preview support for C# 15 union types and closed hierarchies. Your feedback would be appreciated. github.com/eiriktsarpalis/Po… #dotnet

Release v2.0.0-rc.1 · eiriktsarpalis/PolyType

What's new PolyType 2.0.0-rc.1 adds support for C# union types and opt-in polymorphism inference for closed class hierarchies. It also updates the union shape contract and improves reflection a...

github.com
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Adam Sitnik retweeted
Aspire 💫
@aspiredotdevOct 6
The Aspire 13.6 dashboard now uses Native AOT 💫 That means 66% faster median page-visible startup and no separately installed .NET runtime for the native dashboard executable. @JamesNK walks through how the team got there: devblogs.microsoft.com/aspir…

Bringing Native AOT to the Aspire dashboard

Aspire 13.6 brings Native AOT to the dashboard. Explore the startup and deployment benefits, plus the Blazor, Fluent UI, JSON, and Dapper changes that made it possible.

devblogs.microsoft.com
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The upcoming release of System.Text.Json sees a swath of new features focusing on C# and F# union support, JSONL, and further narrowing the functional gap between reflection and the source generator: learn.microsoft.com/en-us/do… #dotnet

What's new in .NET libraries for .NET 11

Learn about the updates to the .NET libraries for .NET 11.

learn.microsoft.com
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I have a new JSON-RPC library for .NET, it's PolyType-based, NativeAOT ready, user-friendly, and much faster than StreamJsonRpc. It supports UTF-8 JSON and MsgPack encoding. Let me know what you think. aarnott.github.io/Nerdbank.J…
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Adam Sitnik retweeted
Ibro
@axeng200Sep 25
C# FTW Everyone doing performance tests: please stop excluding C#. Thanks. After all, this is a top language in Age of Agents. Along with Rust. github.com/devmobasa/lemire-…
Daniel Lemire
@lemireSep 25
How quickly can you create small strings, per programming language? Python, C++, Rust, Go? Is Bun slower or faster than Node.js? Read my article to find out.
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New Video / Blog Post: "Run Local Akka .NET Clusters with .NET Aspire" The biggest win here is that debugging / orchestrating a cluster is trivial now thanks to Aspire + Akka .Management. Links in next post.
Akka.NET Aspire AppHost example

ALT Akka.NET Aspire AppHost example

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C#/.NET being pushed hard running infrastructure at Ethereum's scale. Nethermind runs on ~3k nodes and accounts for ~33% of staked nodes - supporting a ~$334B native asset, ~$146B of stablecoins and ~$54B deposited in DeFi apps. Nethermind 2.0 has some amazing performance work in it: up to 2.55x block throughput, p99 block processing from 1.65s to 208ms, eth_call RPC 15-27% faster and Keccak-256 ~30% faster with platform intrinsics.
Nethermind
@NethermindSep 22
Nethermind Client 2.0.0 is out. It changes how the node stores Ethereum's state: archive nodes drop from ~30 TB to ~2 TB, you choose the history you keep, and blocks process 2–3× faster than the previous release on a fresh node. Nine years since the first commit. The fastest execution software we've ever built. Breaking changes; read the notes before upgrading. Release: github.com/NethermindEth/net…
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It's been a while since I've contributed to ASP.NET, but this time I have an idea that keeps me up at night (io_uring_multishot).
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Guess what I've been profiling this week.
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Adam Sitnik retweeted
.NET
@dotnetSep 15
🎸 .NET 11 goes to 11. 🔥 Smarter JIT deabstraction, fewer allocations, fewer bounds checks, tighter loops, SIMD boosts, and hundreds of runtime/library optimizations. ⚡ Your code may get faster without changing a line. 📖 Read: msft.it/6011abvXZ
A cartoon character, resembling a robot, rides a pink rocket labeled '.NET 11' against a purple background. The text 'Performance Improvements in .NET 11' appears prominently to the left.

ALT A cartoon character, resembling a robot, rides a pink rocket labeled '.NET 11' against a purple background. The text 'Performance Improvements in .NET 11' appears prominently to the left.

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Adam Sitnik retweeted
Aaron Stannard
@AarononthewebSep 2
Reminder: /r/moderndotent's monthly .NET user group thread is up - promote your September 2026 meetups! reddit.com/r/moderndotnet/co…

From the moderndotnet community on Reddit

Explore this post and more from the moderndotnet community

reddit.com
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Adam Sitnik retweeted
Daniel Lemire
@lemireAug 19

Parsing IP addresses in C# at crazy speeds

Article · @lemire
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Adam Sitnik retweeted
Nino Floris@NinoFlorisAug 18
The last 4 months I have been working on a state of the art PostgreSQL driver for .NET. It has a lower layer and a fully featured ADO surface, both with rust level performance and capabilities that far exceed that bar. It's called Slon and it's almost ready for the world.
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Going to try something a bit different - introducing /r/moderndotnet , a totally bare bones subreddit aimed around talking about .NET while not having ridiculous rules and being assholes about it. Please join and help us jumpstart
Aaron Stannard
@AarononthewebAug 14
Guy submits a post about building Magic the Gathering in C# - it gets some votes on /r/programming He cross-posts it to /r/dotnet It gets downvoted to zero and here's the top comments Good lord this subreddit is getting agreeableness-mogged by /r/programming lol
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Adam Sitnik retweeted
Stuart Lang@stuartblangJul 11
Today I'm releasing AotAnywhere, which enables cross platform publishing support for dotnet NativeAOT. Previously you had to use multiple different runners, with AotAnywhere you can publish for all targets from any host. This is continuing the great work of @MStrehovsky
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