5 ms·

68 things the CLR does before executing a single line of your code

132 points by matthewwarren 10y ago

coconut_crab 10y ago
Matt Warren's blog is great to learn about the internal mechanism of .Net. I wonder if there is any similar blog for JVM world, so far I have only know Mechanical Sympathy[1] but it doesn't seem as comprehensive. [1] https://mechanical-sympathy.blogspot.com/ https://mechanical-sympathy.blogspot.com/
- lanna 10y ago
  not a blog, but it might be just what you are looking for: https://www.amazon.com/Inside-Java-2-Virtual-Machine/dp/0074639757/ https://www.amazon.com/Inside-Java-2-Virtual-Machine/dp/0074... https://www.amazon.com/Virtual-Machine-Masters-Venners-1997-09-01/dp/B01K3PBA3W/ https://www.amazon.com/Virtual-Machine-Masters-Venners-1997-...
  - matthewwarren 10y ago
    Cool, thanks for the links, they look like interesting books (even for a .NET dev)
- matthewwarren 10y ago
  > Matt Warren's blog is great to learn about the internal mechanism of .Net Yeah I do seem to write alot about .NET internals, but I just seem to keep finding cool stuff in there!! > I wonder if there is any similar blog for JVM world, Another Java-based blog I like reading is http://psy-lob-saw.blogspot.co.uk/ http://psy-lob-saw.blogspot.co.uk/, I've definitely taken some inspiration from there and written .NET equivalents of his posts.
_doky 10y ago
The title could be read to mean that 68 things are done before every line of code is executed. Got me to read it.
- wofo 10y ago
  That was exactly what I thought as well... I was wondering how it could be performant
- matthewwarren 10y ago
  yeah you're right, I guess you can read it like that, I never noticed that before (I was just so please that I managed to get a 'BuzzFeed' style headline into one of my blog posts!!)
dickvdbrink 10y ago
Nice read, makes it a lot easier to understand how it works and a must read for people who want to contribute to CoreClr!
- matthewwarren 10y ago
  Thanks, yeah that's the aim of writing posts like this (plus I find it fun to figure it all out!)
mysterypie 10y ago
The article could benefit by having a single sentence explaining what CLR is: "The Common Language Runtime (CLR), the virtual machine component of Microsoft's .NET framework, manages the execution of .NET programs [that runs primarily on Microsoft Windows]. -- https://en.wikipedia.org/wiki/Common_Language_Runtime https://en.wikipedia.org/wiki/Common_Language_Runtime
- matthewwarren 10y ago
  good point, I'll update the post (although I think that most people who read my blog are .NET devs)
thewavelength 10y ago
Is there a way to embed multiple, independent DLLs into one host application with the possibility to reload/unload DLLs in .NET Core? I didn't find a way yet because .NET Core does not seem to support the AppDomain concept.

132 points by matthewwarren 10y ago

Matt Warren's blog is great to learn about the internal mechanism of .Net. I wonder if there is any similar blog for JVM world, so far I have only know Mechanical Sympathy[1] but it doesn't seem as comprehensive. [1] https://mechanical-sympathy.blogspot.com/ https://mechanical-sympathy.blogspot.com/

lanna 10y ago
not a blog, but it might be just what you are looking for: https://www.amazon.com/Inside-Java-2-Virtual-Machine/dp/0074639757/ https://www.amazon.com/Inside-Java-2-Virtual-Machine/dp/0074... https://www.amazon.com/Virtual-Machine-Masters-Venners-1997-09-01/dp/B01K3PBA3W/ https://www.amazon.com/Virtual-Machine-Masters-Venners-1997-...
- matthewwarren 10y ago
  Cool, thanks for the links, they look like interesting books (even for a .NET dev)
matthewwarren 10y ago
> Matt Warren's blog is great to learn about the internal mechanism of .Net Yeah I do seem to write alot about .NET internals, but I just seem to keep finding cool stuff in there!! > I wonder if there is any similar blog for JVM world, Another Java-based blog I like reading is http://psy-lob-saw.blogspot.co.uk/ http://psy-lob-saw.blogspot.co.uk/, I've definitely taken some inspiration from there and written .NET equivalents of his posts.

_doky 10y ago

The title could be read to mean that 68 things are done before every line of code is executed. Got me to read it.

wofo 10y ago
That was exactly what I thought as well... I was wondering how it could be performant
matthewwarren 10y ago
yeah you're right, I guess you can read it like that, I never noticed that before (I was just so please that I managed to get a 'BuzzFeed' style headline into one of my blog posts!!)

dickvdbrink 10y ago

Nice read, makes it a lot easier to understand how it works and a must read for people who want to contribute to CoreClr!

matthewwarren 10y ago
Thanks, yeah that's the aim of writing posts like this (plus I find it fun to figure it all out!)

mysterypie 10y ago

The article could benefit by having a single sentence explaining what CLR is: "The Common Language Runtime (CLR), the virtual machine component of Microsoft's .NET framework, manages the execution of .NET programs [that runs primarily on Microsoft Windows]. -- https://en.wikipedia.org/wiki/Common_Language_Runtime https://en.wikipedia.org/wiki/Common_Language_Runtime

matthewwarren 10y ago
good point, I'll update the post (although I think that most people who read my blog are .NET devs)

thewavelength 10y ago

Is there a way to embed multiple, independent DLLs into one host application with the possibility to reload/unload DLLs in .NET Core? I didn't find a way yet because .NET Core does not seem to support the AppDomain concept.