EgorBo

@EgorBo

Principal Engineer at Microsoft working on .NET runtime.

Warsaw, Poland

github.com/EgorBo

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EgorBo
@EgorBo
Aug 28
Decided to check C# (it also emits a Trie for pattern matches like that) - it turned out it needed a little help on the Roslyn side for this case, filed github.com/dotnet/roslyn/… 🙃
Dmitriy Kovalenko
@neogoose_btw
Aug 28
This is by the way one of the reasons why the code you write in C without thinking going to be slower than rust:
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EgorBo
@EgorBo
Aug 26
Unions in C# vs alternative. Hint: both suggestions have memory model issues making them unsafe (at least the 2nd one, 1st one is arguably too).
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EgorBo
@EgorBo
Aug 22
C# 15.0:
$sealed interface Temperature { record Celsius(int val) implements Temperature {} record Fahrenheit(int val) implements Temperature {} } void main() { Temperature temperature = new Temperature.Celsius(35); switch (temperature) { case Temperature.Celsius(var t) when t > 30 -> IO.println(t + "C is above 30 Celsius"); case Temperature.Celsius(var t) -> IO.println(t + "C is equal to or below 30 Celsius"); case Temperature.Fahrenheit(var t) when t > 86 -> IO.println(t + "F is above 86 Fahrenheit"); case Temperature.Fahrenheit(var t) -> IO.println(t + "F is equal to or below 86 Fahrenheit"); } var number_str = "10"; switch (Result.of(() -> Integer.parseInt(number_str))) { case Result.Ok<?> ok -> IO.println(ok.val()); case Result.Err<?> err -> IO.println(err.err()); }; }$
Joel 🇦🇺
@ptr_to_joel
Aug 22
modern java (top) rust (bottom) the java you thought you knew is no more
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EgorBo
@EgorBo
Aug 20
In the AI era, a good language platform needs a rich standard library out of the box. You shouldn't need 3rd-party packages for basic things like pad-left/arrayref. Every micro-dependency is just another entry point for a supply chain attack.
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EgorBo
@EgorBo
Aug 17
It feels like good open-weight models fall into 3 price tiers: 1) 24-64GB MacBook: Qwen3.8-27B Q4–Q8. Might work for simple tasks with a plan from a smarter model, but IMO just a toy. 2) 1-2× RTX PRO 6000: Qwen BF16 (big context, kv-cache) or DeepSeek-V4-Flash (with offloading).
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