Seiryu @iSeiryu Twitter profile | Pikagi

Pikagi

Seiryu

@iSeiryu

802

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~20 years of designing and building large scale distributed systems. Father, programmer, coffee lover ☕ beer enthusiast 🍻 #programming #backend #cloud ☁️

United States

Joined September 2009

Don't wanna be here? Send us removal request.

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@iSeiryu

Seiryu

2 months

About me: I designed and implemented backend systems that serve traffic to 100+ million daily users across the US and Canada. Previously a full-stack developer (web, desktop, and some mobile), I’ve transitioned to focus solely on backend work. My extensive experience, often

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@iSeiryu

Seiryu

3 months

The source code to Descent 3 was released on GitHub. It sounds like a very painful project...

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@iSeiryu

Seiryu

2 months

Several people suggested to try Axum So far they show the same results in terms of requests per second. Rust: 45k C#: 45k JS: 5k I added the source code here: #csharp and #rust probably show better results compared to the previous

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@iSeiryu

Seiryu

2 months

#rust with produces similar to #dotnet results but requires way more code and macro "magic". C#: 34k Rust: 34k JS: 4k The actual numbers fluctuate from run to run, C# and Rust keep showing very similar numbers. JS's highest I've seen was 4.4k. I mixed

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@iSeiryu

Seiryu

2 months

#csharp experience in VSCode without Dev Kit is just as good as "the fullest" experience of TS or Golang in VSCode. It just means that C# experience in VS Pro or Rider is better than JS/TS or Go. VS Community is also free and the same license is applied to C# Dev Kit.

@GergelyOrosz

Gergely Orosz

2 months

There's this question of why the majority of startups don't use C# to build their software (an amazing language). To use C# to its fullest, you need to buy Visual Studio licenses (Pro/Enterprise), per developer: $$$ To use TypeScript or Go to its fullest: you don't need this.

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@iSeiryu

Seiryu

1 month

bflat is a concoction of Roslyn - the "official" C# compiler that produces .NET executables - and NativeAOT (née CoreRT) - the ahead of time compiler for .NET based on CoreCLR. Thanks to this, you get access to the latest C# features using the high

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bflat - C# as you know it but with Go-inspired tooling

Build tiny, selfcontained, and native executables with C#

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@iSeiryu

Seiryu

3 months

Pattern matching in #dotnet is very powerful, to demonstrate this, I will compare how a relatively complex switch/match statement differs between #csharp and #fsharp (F# example is ⬇️). Although, F#'s DUs look much better than C#'s inheritance, I personally prefer C#'s pattern

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@iSeiryu

Seiryu

2 months

#rust with produces similar to #dotnet results but requires way more code and macro "magic". C#: 34k Rust: 34k JS: 4k The actual numbers fluctuate from run to run, C# and Rust keep showing very similar numbers. JS's highest I've seen was 4.4k. I mixed

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@iSeiryu

Seiryu

2 months

@maxx_don @CordasFilip JSON test with a made up example that gets a fairly complex object, parses it, and generates a new JSON body to send back. 34k vs 4.4k JS also cheats here. C# does full parsing of the incoming JSON object and performs casting and validation. E.g. if you submit a non-existing

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@iSeiryu

Seiryu

2 months

A simple LTS #dotnet (up) vs #nodejs (bot) on Ubuntu benchmark. I didn't do any optimizations. Just a brand new project with the most basic code in both stacks. 40k vs 6k I honestly expected the gap would be more significant, but almost 7 times difference is good too. Need to

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@iSeiryu

Seiryu

1 month

@tolenec @TateMcCormick @davidfowl C# went beyond JS from that perspective.

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@iSeiryu

Seiryu

3 months

It's not as crazy as Descent 3 but there are still some fun parts in this source code. This time I used my own tool to cross-reference bad words from against the MS-DOS repo. Here is the full list my tool found:

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@shanselman

Scott Hanselman 🌮

3 months

Microsoft just open-sourced DOS 4 (as well a release of beta binaries, disk images, and PDFs from @rozzie 's archives!) (but who did the PR?!)

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@iSeiryu

Seiryu

3 months

@DevLeaderCa

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GitHub - dotnet/aspnet-api-versioning: Provides a set of libraries which add service API versioning...

Provides a set of libraries which add service API versioning to ASP.NET Web API, OData with ASP.NET Web API, and ASP.NET Core. - dotnet/aspnet-api-versioning

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@iSeiryu

Seiryu

3 months

* 6 2/12/97 5:35p Jason * fixed yet another dumb syntax error...will I ever learn? * * 5 2/12/97 5:34p Jason * fixed dumb syntax error All of us are a little bit Jason sometimes.

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@iSeiryu

Seiryu

2 months

@davidnix_ @jasonvmiller Firing in the US is a huge headache for the companies. Legal (!), budget (especially with sign-on bonuses, medical/pension accounts on day 1, and training), wasted time.

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@iSeiryu

Seiryu

3 months

When will we learn that if temporary code makes its way into the codebase it will never leave it? That's how tech debt is made.

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@iSeiryu

Seiryu

3 months

That's what it would look like in a language that likes recursion. #fsharp

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@iSeiryu

Seiryu

3 months

okay, I didn't need to lookup the algorithm, but it took longer that I was hoping it would to lookup Rust syntax. And I'm still not sure this is the best way to do it in Rust. Turns out #Rust prefers iterative approach over recursion. P.S. is there a better way to draw trees?

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@iSeiryu

Seiryu

2 months

Here is the #fsharp version. I did not install any additional extensions. I only needed to slightly modify launch.json and tasks.json.

@iSeiryu

Seiryu

2 months

#csharp experience in VSCode without Dev Kit is just as good as "the fullest" experience of TS or Golang in VSCode. It just means that C# experience in VS Pro or Rider is better than JS/TS or Go. VS Community is also free and the same license is applied to C# Dev Kit.

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@iSeiryu

Seiryu

1 month

@DanielW_Kiwi If you need relations (you know, the R in RDBMS) and you have a lot of them - you have to use an RDBMS, hence SQL. Strong consistency is also much simpler with an RDBMS. Hasen seems to be a fan of a key-value storage (prob as a single file) that is given directly to the client.

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@iSeiryu

Seiryu

3 months

#fsharp version I definitely like the data modeling in F# more - discriminated unions for the win. I'm wondering if there is a better way of doing it though? I'd like to learn what other techniques devs use and see if my code could be further improved.

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@iSeiryu

Seiryu

2 months

In case anyone wanted to know what #dotnet 's Garbage Collector looks like. It's a 52922 lines · 1.81 MB file. They probably made it a single file as a compile time optimization strategy.

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@iSeiryu

Seiryu

23 days

Why gRPC or REST may be preferred over GraphQL on your project. - Gql is slower no matter how you slice it. - Gql consumes more resources. - Gql is very dangerous when open to the public anonymously, it's always best to keep gql endpoints behind some kind of auth. -

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@iSeiryu

Seiryu

3 months

@csharpfritz We have Dev Drive now:

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Set up a Dev Drive on Windows 11

Learn about the new Dev Drive storage available to improve file system performance for development scenarios using the ReFS volume format, including how to set it up, designate trust to use perform...

learn.microsoft.com

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@iSeiryu

Seiryu

4 months

@vestnikstabilno @Erline1612 @mapiu2016 Я не совсем в теме, но со стороны выглядит как претензии к тем, кто накидывался на презентацию фильма Навальный, а не на сам фильм украинской команды, его участников или тех кто на сцене.

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@iSeiryu

Seiryu

3 months

"The closest solutions to our proposal are Orleans and Akka. These frameworks also use abstractions to decouple the application and runtime. Ray is another actor based framework but is focused on ML applications. None of these systems support atomic rollouts, which is a necessary

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@iSeiryu

Seiryu

2 months

If your services do sync communication via an async method, you're doing it wrong. If you have more than 2 microservices in a sync call chain, you're probably doing it wrong. If it takes longer than 10ms for a service-to-service communication, you're probably doing it wrong.

@DanielW_Kiwi

Daniel 🦔

2 months

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@iSeiryu

Seiryu

2 months

@DanielW_Kiwi As someone who had to deal with multiple backend systems written in JS/TS - I disagree. Those companies burned a lot of cash to support their creations and I heard multiple developers saying "why didn't we choose a normal language?" while chasing infinite bugs.

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@iSeiryu

Seiryu

2 months

@ankkala @tsoding @anammostarac I thought I would too and then it got old.

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@iSeiryu

Seiryu

4 months

It's finally coming! @FrameworkPuter #hardware

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@iSeiryu

Seiryu

3 months

What's stopping you from working like this?

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@iSeiryu

Seiryu

1 month

@webdevcody Some people still use SOAP (WSDL) with SQL Server/Oracle and never heard of anything mentioned in this post.

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@iSeiryu

Seiryu

1 month

That should do it.

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@iSeiryu

Seiryu

4 months

@ThePrimeagen @Jordy_vD_ I just tested - it's a shallow copy too 😔

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@iSeiryu

Seiryu

2 months

Great resource if you want to start with #fsharp .

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Why you should consider using F# for your next project

fsharpforfunandprofit.com

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@iSeiryu

Seiryu

1 month

@fjzeit @davidfowl

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@iSeiryu

Seiryu

1 month

I worked on a large set of microservices written in Go 2 years ago. It was a terrible mess. The payment endpoint took 5 minutes (!) to respond. Some other endpoints could take a few seconds to execute too. After messing with it for a month the client made a decision to gradually

@pierre_vannier

Pierre Vannier - AI Engineer // 🇪🇺eu/acc

@pierre_vannier

1 month

@ThePrimeagen Go architects who invent nuclear weapon architectures that no one would understand except them (valid for other languages too, but especially valid for exotic nerd languages like Go, Rust )

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@iSeiryu

Seiryu

1 month

Marge Sort

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@iSeiryu

Seiryu

4 months

@erjdev @ThePrimeagen When I was a jr our lead asked for our functions to fit onto the screen "if possible". This advice served me well for 15 years. Our functions are typically 40-100 LOC. They can be longer when splitting them doesn't make sense.

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@iSeiryu

Seiryu

5 months

@Nartur10 @ElevenSadFaces @gvelnore Серьёзный вопрос - зачем такие, как вы, вообще существуете? С таким закрытым кругозором смысл существования теряется.

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@iSeiryu

Seiryu

3 months

@jerrynixon @dotnet All of those (except 4) would be difficult for a junior to understand. I'd vote 1 but convert the local function to a classic method and pass the params to it explicitly. I'd also unify the way the exceptions are thrown - either use extensions for both or the explicit "new".

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@iSeiryu

Seiryu

3 months

Thank you Twitter

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@iSeiryu

Seiryu

2 months

My very first serious project in the beginning of my career was 20k LOC (lines of code) in a single file, in a single class. I wrote the whole thing by myself. I learned C++ with OOP in college. I could create base and actual classes for things like animal, cat, dog. I could

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@iSeiryu

Seiryu

3 months

@JonCanning @davidfowl Dang, 10 years living under the rock? At least they know about unsafe and pointers.

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@iSeiryu

Seiryu

2 months

@davidnix_ @joaoaguiam We used to offer our candidates to either do a coding challenge or bring their own project and walk us through it. They get the instructions at least one week ahead of the interview so they have time to prepare. I had 2 candidates that brought their own projects. They were

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@iSeiryu

Seiryu

4 months

It's so pretty! *twitter lost my picture on the original post...*

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@iSeiryu

Seiryu

4 months

My Framework 16 is finally here! The shipment was very fast - only 2 days. Everything arrived in a great condition. I love how it looks so far and I think I'm going to buy a few more modules for it soon :) More details in the thread. @FrameworkPuter #Linux #hardware

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@iSeiryu

Seiryu

2 months

To execute these 4 lines of #python in a Jupyter notebook I had to download about 20 GB of dependencies. WTH?

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@iSeiryu

Seiryu

3 months

@terrajobst "Although the tz database does not support time on other planets, it is documented here in the hopes that support will be added eventually." Eventually, we will have to worry about what planet the device is on.

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@iSeiryu

Seiryu

2 months

Answering top 10 "can .net" questions.

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@iSeiryu

Seiryu

3 months

Here is a good website to try various mono #fonts with features like ligatures and glyphs

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@iSeiryu

Seiryu

2 months

@maxx_don @CordasFilip JSON test with a made up example that gets a fairly complex object, parses it, and generates a new JSON body to send back. 34k vs 4.4k JS also cheats here. C# does full parsing of the incoming JSON object and performs casting and validation. E.g. if you submit a non-existing

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@iSeiryu

Seiryu

2 months

New Win laptop setup. winget install -e --id Microsoft.WindowsTerminal winget install -e --id Microsoft.PowerShell winget install -e --id JanDeDobbeleer.OhMyPosh winget install -e --id Valve.Steam winget install -e --id Git.Git winget install -e --id Docker.DockerDesktop winget

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@iSeiryu

Seiryu

3 months

The ternary condition from hell 🔥

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@iSeiryu

Seiryu

3 months

@Mr_K_here lol

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@iSeiryu

Seiryu

3 months

@DevLeaderCa If we create a DB from scratch I usually default to EF. Migrations (DB versioning) are a must. If it's an old project with a large existing DB then it's much faster to plug Dapper. If my app is not the owner of the DB (bad but common practice) then Dapper it is.

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@iSeiryu

Seiryu

2 months

@codemullins Dotnet does not actually consume as much RAM as people on the Internet claim. It reserves a good chunk of RAM for spikes. Some of it is configurable and some RAM consumption goes down when AOT compiled. Here is a demo of how it handles spikes:

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How Much Memory for 1,000,000 Threads in 7 Languages | Go, Rust, C#,...

Recorded live on twitch, GET IN https://twitch.tv/ThePrimeagenty piotr!https://pkolaczk.github.io/memory-consumption-of-async/MY MAIN YT CHANNEL: Has well ed...

www.youtube.com

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@iSeiryu

Seiryu

2 months

@ankkala @tsoding @anammostarac I still drink coffee but don't really consume any food outside of lunch time and occasional fun time after 4pm.

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@iSeiryu

Seiryu

7 months

@nkanauzu @viet2nt @davidfowl You just upset all 10 of us

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@iSeiryu

Seiryu

3 months

@Hasen_Judi >I've seen plenty of messed up (poorly architected) systems ... Same, but I'm not making any assumptions about your or anyone else's work until I actually see it. You are accusing other people in doing poor job. It's your job to provide proofs and not

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Russell's teapot - Wikipedia

en.wikipedia.org

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@iSeiryu

Seiryu

1 month

Math explained, as simple as possible. Every concept is explained step by step, from elementary to advanced. No fancy tricks and mathematical magic. Intuition and motivation first, technical explanations second.

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Mathematics of Machine Learning book

The theory and math behind machine learning are beautiful, and I want to show this to you. Get the Early Access now!

tivadardanka.com

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@iSeiryu

Seiryu

10 months

@housecor If you need to explain those things to a group of developers then the whole group should be let go. Those are not developers - those are students.

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@iSeiryu

Seiryu

2 months

You might not believe it, but the answer to this problem is 5!

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@iSeiryu

Seiryu

3 months

What would you rather use for a daily commute?

Personal auto

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Public transportation

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@iSeiryu

Seiryu

3 months

I think programming is the only profession where we can randomly say "kill a child" and no one will think it's something abnormal.

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@iSeiryu

Seiryu

1 month

Battlenet app: use your browser to log in. Browser: shit happened, go back to your app. Battlenet app: go back to the browser. Browser: ... I cannot log into my own account... #uxfail

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@iSeiryu

Seiryu

2 months

@Perksey I agree that it's not fair and that's why I put the word magic in quotes. C#/F# can do metaprogramming and source generation too. If I was more familiar with Rust/Rocket I would probably not even think to call it "magic". I have never got lost with anything DI related in

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@iSeiryu

Seiryu

2 months

#dotnet has been a good choice for IoT and embedded development for several years now.

@Manitcor

Manitcor

2 months

@magnum_d1ngus @p1xelHer0 on the control boards we would signal to, would stand along side the C dev while we defined and tested signaling patterns. .NETs network stack makes handling multi-threaded network signaling from 2000+ individual units easier to manage, lots of thought into the fact that the

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@iSeiryu

Seiryu

2 months

#Golang has evolved quite a bit since 2014, so it's not as simple anymore as it used to be (generics are a thing now). But it still has a lot less features compared to other popular languages.

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@iSeiryu

Seiryu

3 months

@Hasen_Judi What do "any of this" and 99% consist of? How is my message an indicator of people over calling anything? Could you provide an example of a "real well architected" system from financial/healthcare/telecom industries that serves traffic to millions of users daily?

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@iSeiryu

Seiryu

3 months

People tend to think that #backend is about producing API endpoints, but that's only 5% of the actual backend work. BE (backend) is about - concurrency - security - observability - scalability - DR (disaster recovery) - databases - data integrity - performance

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@iSeiryu

Seiryu

1 month

If I didn't know the subject of this book I would've been very confused. The book:

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@iSeiryu

Seiryu

3 months

I think programming is the only profession where we can randomly say "kill a child" and no one will think it's something abnormal.

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@iSeiryu

Seiryu

3 months

@DevLeaderCa I watch the whole every year and then spend the next 2-5 days getting used to the new things after which it's a smooth sail.

Join the .NET Conf 2024 free virtual event November 12-14 to learn about the newest developments across the .NET platform, open source, and dev tools. Mark your calendar!

www.dotnetconf.net

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@iSeiryu

Seiryu

2 months

I had no idea that DuckDuckGo relied on Bing’s search results!

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Bing’s API was down, taking Microsoft Copilot, DuckDuckGo and ChatGPT's web search feature down too...

Bing, Microsoft’s search engine, was working improperly for several hours on Thursday in Europe. At first, we noticed it wasn’t possible to perform a web

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@iSeiryu

Seiryu

2 months

A month ago I went to pickup my kid's prescription. They asked me for their DOB. I smiled, because of course, I remember it as well as I remember my own name. And yet, I just kept smiling, unable to say a word. My mind was rushing, trying to retrieve that valuable piece of

@DanielW_Kiwi

Daniel 🦔

2 months

Anyone else struggle to remember their kids birthday dates? I might just be a bad person but I have to write it in my phone.

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@iSeiryu

Seiryu

3 months

"Net8 WASM threading is very broken, my 2c: don't do it to your users." Oh well, waiting for dotnet 9.

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[browser][MT] Multithreading and JavaScript async interop in .NET 9 · Issue #85592 · dotnet/runtime

Tracking issue for further work on JS interop and multithreading. Constituent part of #76956 Goals CPU intensive workloads on dotnet thread pool Allow user to start new managed threads using new Th...

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@iSeiryu

Seiryu

3 months

@AgileJebrim @Hasen_Judi A real app does a lot more than a helloworld SQL query. It can work with multiple data sources and other services + perform some heavy CPU computations. Each IO operation can delay the response by a few hundred ms.

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@iSeiryu

Seiryu

2 months

@cfbao There are probably hundreds of thousands of devs with the same belief out there... It even has intellisense with auto-complete, refactoring, jumping to definitions, finding references.

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@iSeiryu

Seiryu

3 months

okay, I didn't need to lookup the algorithm, but it took longer that I was hoping it would to lookup Rust syntax. And I'm still not sure this is the best way to do it in Rust. Turns out #Rust prefers iterative approach over recursion. P.S. is there a better way to draw trees?

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@iSeiryu

Seiryu

3 months

How many people can actually invert a binary tree without looking it up?

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@iSeiryu

Seiryu

3 months

@WasteCleaner Maintainable code and good performance. "Clean code" is a very subjective thing. Maintainable code can be measured with metrics, but not every team is willing to develop those metrics.

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@iSeiryu

Seiryu

3 months

@thedevdad_ @ThePrimeagen 95% of the time copilot suggests not what I need. I either have to type faster to prevent it getting in my way or constantly hitting Esc. I'm not turning it off because it helps with the other 5% pretty well.

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@iSeiryu

Seiryu

3 months

Classic swap is still more performant with value types. It's interesting that XOR is basically the same as Tuple. The actual perf will depend on how those vars are used. For reference types it doesn't really matter (performance wise) which method you use. #csharp #dotnet

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@terrajobst

Immo Landwerth

3 months

Now that's sexy

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@iSeiryu

Seiryu

2 months

I guess it's time to downgrade my payment for this service. It was nice to be able to write long messages, see less ads, undo/edit messages. Thanks @X P.S. I didn't violate any of the things listed in this screenshot or in the rules.

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@iSeiryu

Seiryu

1 month

@WillEBunting @tsoding I worked for several Fortune 500 companies. Python may exist somewhere within the org beyond AI/ML, but it's not the main stack. I personally rewrote two Python-based backends with something more appropriate for backend.

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@iSeiryu

Seiryu

2 months

@damienguard If you're able to pay annual salary + benefits to 250+ developers you can definitely afford licenses, be it VS or much cheaper Rider. Keep in mind that some devs will intentionally use things like neovim or plain VSCode which are completely free. I even know devs that buy Rider

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@iSeiryu

Seiryu

4 months

@ml4funandprofit @kiyov09 @typecraft_dev I installed Ubuntu on my parents PC 12 years ago - it's still going strong.

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@iSeiryu

Seiryu

7 months

@Korn1699 @ThePrimeagen You don't need a license to use C#, F#, dotnet SDK, dotnet runtimes or Kestrel (web server). You need a license to use VS and Rider when you get more than $1 million in profit. InteliJ, PyCharm, PhpStorm, WebStorm, GoLand also require a license.

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@iSeiryu

Seiryu

2 months

@matt_pratta I did most of my tests without AOT. I simply ran dotnet run -c release I tried AOT once and it showed the same results on Ubuntu.

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@iSeiryu

Seiryu

2 months

@oneshadab @MartinDotNet @Skyb0rg It is FOSS and cross-platform and it's been like that for 10 years already. People just like to hate.

@iSeiryu

Seiryu

2 months

#csharp experience in VSCode without Dev Kit is just as good as "the fullest" experience of TS or Golang in VSCode. It just means that C# experience in VS Pro or Rider is better than JS/TS or Go. VS Community is also free and the same license is applied to C# Dev Kit.

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@iSeiryu

Seiryu

4 months

@ezdubs_bot @db_regret @tsoding This particular joke is close to impossible to translate properly, hence it sounds stupid in English, but it's a very good bot!

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@iSeiryu

Seiryu

9 months

@mkristensen I've been doing it for a few years by adding a small script to my pwsh profile. It looks for an sln or a csproj file and opens it.

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@iSeiryu

Seiryu

2 years

@FelixSchlang @elonmusk @TSStarfish I agree that copyright sucks in general because it's misused and abused, especially on YT. But why would you re-stream an already available stream?..

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@iSeiryu

Seiryu

2 months

@john_e_bones @MartinDotNet Not for Microsoft as a whole, but for some of their products, which are simply good. You can love C# and MSSQL and at the same time love Arch Linux, PostgreSQL or @TigerBeetleDB , Neovim, OCaml. People spread too much hate for no reason.

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@iSeiryu

Seiryu

3 months

Brain damaged users existed in 80s too.

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@iSeiryu

Seiryu

2 months

@KatieKeithBarn2 @VoxelPrismatic And "what else should I mute"

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@iSeiryu

Seiryu

2 months

@rodtrent It's not a fair comparison. One is a scripting language and another one is an actual shell, like bash or zsh. While you can script anything you want with pwsh, they solve different sets of problems.

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@iSeiryu

Seiryu

2 months

In 1959 the cost of a new house was less than 2x average income. Today the average income in the US is $60k and the cost of a new house is $250k in a typical state/city and 650k in a more in demand area. Side note: apparently, we have a party in the terminal.

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@iSeiryu

Seiryu

1 month

I think Visual Studio answered its own question... Tbh, I never found those errors useful. It's faster to just restart the IDE than digging into the errors it generated.

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@iSeiryu

Seiryu

1 month

MacOS is the only one that they have precompiled binaries for. But it was pretty easy to build it for Windows. It took 12 minutes to do a debug build and 16 minutes for a release build.

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@iSeiryu

Seiryu

1 month

Zed IDE @zeddotdev , which is known for being a high-performance, multiplayer code editor, is hiring the author of @roc_lang , @rtfeldman . The interview was comprehensive and engaging, covering a range of topics from technical aspects to fun

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@iSeiryu

Seiryu

1 month

@tolenec @TateMcCormick @davidfowl

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@iSeiryu

Seiryu

2 months

Towards Modern Development of Cloud Applications: C1-C5 challenges mentioned in the previous post.

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@iSeiryu

Seiryu

3 months

"The closest solutions to our proposal are Orleans and Akka. These frameworks also use abstractions to decouple the application and runtime. Ray is another actor based framework but is focused on ML applications. None of these systems support atomic rollouts, which is a necessary

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@iSeiryu

Seiryu

3 months

"a gross temporary fix" - suuure, temporary.

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@iSeiryu

Seiryu

2 months

@maxx_don @CordasFilip C# also uses completely immutable data structures which may add to the compute overhead. JS does not guarantee immutability.

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