C#•13mo ago

Hello World taking 30 seconds + to run

Honestly baffled as to how this is possible. I'm running an ubuntu docker container locally on my m1 mac. I am installing dotnet in my dockerfile with the dotnet-install script like so:

RUN wget https://dot.net/v1/dotnet-install.sh \
    && chmod +x ./dotnet-install.sh \
    && ./dotnet-install.sh --channel 6.0 --install-dir /home/.dotnet \
    && chmod -R og=rwx /home/.dotnet \
    && export PATH="/home/.dotnet:$PATH" \
    && dotnet new console -o /home/project \
    && chmod -R og=rwx /home/project \

RUN wget https://dot.net/v1/dotnet-install.sh \
    && chmod +x ./dotnet-install.sh \
    && ./dotnet-install.sh --channel 6.0 --install-dir /home/.dotnet \
    && chmod -R og=rwx /home/.dotnet \
    && export PATH="/home/.dotnet:$PATH" \
    && dotnet new console -o /home/project \
    && chmod -R og=rwx /home/project \

When I go to run hello world, I copy the hello world c# file into the project and run it like so:

cp main.cs project/Program.cs \
&& dotnet run --project project

cp main.cs project/Program.cs \
&& dotnet run --project project

It may be worth noting that because I'm using jupyterhub to spin up docker containers on demand, the first time I try to run the hello world I get a whole "welcome to C#" spiel and it takes over a minute. However, on all subsequent runs (with the docker container ready) it doesn't do that but it still takes usually around 30-40 seconds at least. Am I missing something? How on earth could it be this slow?

29 Replies

x0rld 👻 🎃•13mo ago

dotnet run doesn't just execute your program

JooOP•13mo ago

is there a better way to just execute it? i saw script but that seems to be for single files only

x0rld 👻 🎃•13mo ago

./MyProgram 🤔

JooOP•13mo ago

that's only if it's already built, no? i need to build it on demand each time

x0rld 👻 🎃•13mo ago

what are you trying to do exactly ?

JooOP•13mo ago

and besides, when googling for stuff like this i saw people complaining about slow load speeds - and they were talking like 3 seconds (for run) specifically. this seems like something is really messed up to be exact on what im trying to do: an ide that runs c# programs in the browser using websockets to communicate with the docker container running on server that can run the code on demand the infrastructure is there for other languages so its just a question of getting the c# to be performant im not sure if its a local thing due to some weird interaction with m1 chips or something because it was hard enough even getting c# to install without segfaulting thats why i had to use version 6.0

x0rld 👻 🎃•13mo ago

getting c# without segfault ? O_o

JooOP•13mo ago

.net*

x0rld 👻 🎃•13mo ago

what ever wtf ?

JooOP•13mo ago

the .net install script segfaults when trying to install

x0rld 👻 🎃•13mo ago

btw just use a dotnet sdk image

JooOP•13mo ago

its a known issue

JooOP•13mo ago

https://github.com/dotnet/dotnet-docker/issues/4225

GitHub

Segmentation fault building project on dotnet/sdk:7.0 image with Ap...

Describe the Bug Running into a problem where creating a docker image from mcr.microsoft.com/dotnet/sdk:7.0 on an M1 Apple MacBook Pro throws a segmentation fault from package qemu during publish. ...

x0rld 👻 🎃•13mo ago

it's not installing .NET

JooOP•13mo ago

right yeah mb not the install script the setup of the project afterwards

x0rld 👻 🎃•13mo ago

they say publish 🤔 you don't have to publish anything

JooOP•13mo ago

i mean i didnt publish anything and it still segfaulted lol im not making this up? clearly theres an issue with dotnet and m1s regardless of whether my issue is EXACTLY the same as theirs

x0rld 👻 🎃•13mo ago

at the end they say that it's a QEMU error and give this link to read more on how to use without QEMU https://devblogs.microsoft.com/dotnet/improving-multiplatform-container-support/

JooOP•13mo ago

well like i said i avoided the segfault by setting the version back - unless you think this might also be causing the slow performance?

x0rld 👻 🎃•13mo ago

docker is running through as linux VM I don't think that's the best way to have performance aie

has no native support for docker (cause it's an Unix OS )

JooOP•13mo ago

i wonder if i just need to test it on our actual live servers because it seems like it might just be an environment issue

x0rld 👻 🎃•13mo ago

install dotnet on your mac and test it ? 🤔

JooOP•13mo ago

well then id lose the whole point of the test which is making sure it works on our docker containers which run the servers

x0rld 👻 🎃•13mo ago

install virtualbox and setup everything in a whatever distrib you will use ?

Mayor McCheese•13mo ago

Is this to run adhoc code from a website?

MODiX•13mo ago

Mayor McCheese

REPL Result: Success

Console.WriteLine("Hello World");

Console.WriteLine("Hello World");

Console Output

Hello World

Hello World

Compile: 503.617ms | Execution: 72.247ms | React with ❌ to remove this embed.

Mayor McCheese•13mo ago

Iirc we're doing that with this bot @Cisien I think you wrote the eval code doesn't it run in a container?

Cisien•13mo ago

yes

Cisien•13mo ago

https://github.com/discord-csharp/csharprepl

GitHub

GitHub - discord-csharp/CSharpRepl: CSharpRepl is a web api for C# ...

CSharpRepl is a web api for C# REPL using the Roslyn Scripting APIs - GitHub - discord-csharp/CSharpRepl: CSharpRepl is a web api for C# REPL using the Roslyn Scripting APIs

Gaming

Programming

Hello World taking 30 seconds + to run