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CoreCLR is the runtime for .NET Core. It includes the garbage collector, JIT compiler, primitive data types and low-level classes.

137 mentions on Hacker News by 97 people: 20 stories, 117 comments · first 2015-02-03 · latest 2025-04-14

Mentions per year 137 mentions · busiest year 2015 (44)
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  1. Has anyone tested this project on NetBSD. https://github.com/dotnet/coreclr/pull/4504/files Any reason why it would not work.
    comment by 1vuio0pswjnm7 · 2025-04-14 · in Rust to C compiler – 95.9% test pass rate, odd platforms
  2. …a few years ago.[3] [1] https://youtrack.jetbrains.com/issue/RIDER-31366/EditContinu... [2] https://github.com/dotnet/coreclr/issues/23685 [3] https://github.com/omnisharp/omnisharp-vscode/issues/5276
    comment by nonbirithm · 2022-08-16 · in .NET 6 is now in Ubuntu 22.04
  3. Use perfcollect for Linux: https://github.com/dotnet/coreclr/blob/master/Documentation/... Since that is adapted to use Linux specifics :)
    comment by NicoJuicy · 2021-06-18 · in .NET 6 Preview 5
  4. …altogether). However, the promise seems fine for users of the framework (IANAL etc. etc.). [0] https://github.com/dotnet/coreclr/blob/master/PATENTS.TXT
    comment by yyyk · 2020-07-16 · in Introducing Swift Service Lifecycle
  5. It appears that the .NET Core CLR does perform some rudimentary escape analysis: https://github.com/dotnet/coreclr/pull/6653
    comment by noblethrasher · 2020-07-02 · in HotSpot compiler: Stack allocation prototype for C2
  6. …pull request to split up that source file was closed by someone else with summary justification: https://github.com/dotnet/coreclr/pull/403 I think you're oversimplifying the problem here, which may be in great part institutional.
    comment by ani-ani · 2020-05-26 · in The original .NET garbage collector was written in Common Lisp
  7. This. Modern C# in net-core 3 can even match C++ at manually vectorized numeric code: https://github.com/dotnet/coreclr/issues/27909#issuecomment-...
    comment by Const-me · 2019-12-30 · in A lot of complex “scalable” systems can be done with a simple, single C++ server
  8. …was enough to recompile from the fast “tier 0” JIT code to the fully optimized “tier 1” JITed code. https://github.com/dotnet/coreclr/blob/master/Documentation/...
    comment by nycdotnet · 2019-12-07 · in JIT and Ruby's MJIT
  9. I'm not sure if that is still true for .net core 3 Edit: Looks like it still is not done: https://github.com/dotnet/coreclr/issues/20486
    comment by merb · 2019-09-25 · in Graal Autovectorization
  10. Windows programmers are familiar with StrSafe.h, https://en.wikipedia.org/wiki/Strsafe.h and https://github.com/dotnet/coreclr/blob/master/src/pal/inc/st... which go a lot further. Also found https://github.com/mubix/netview/blob/master/ban…
    comment by dblock · 2019-08-25 · in Banned C standard library functions in Git source code
  11. Well, .NET GC was originally implemented in Lisp. https://github.com/dotnet/coreclr/issues/401 And NeXTSTEP Interface Builder prototype was done in Common Lisp https://en.wikipedia.org/wiki/Interface_Builder https://vimeo.com/62618532 So…
    comment by pjmlp · 2019-07-08 · in Why Lisp Failed (2010)
  12. Waiting it to be ported to BSD systems[1][2][3]. [1] https://github.com/dotnet/coreclr/labels/os-freebsd [2] https://github.com/dotnet/corefx/labels/os-freebsd [3] https://github.com/dotnet/corefx/labels/os-netbsd
    comment by xvilka · 2019-07-07 · in The Evolving Infrastructure of .NET Core
  13. …of the standard library, like List and Dictionary, are 100% managed code, to be specific it's C#: https://github.com/dotnet/coreclr/blob/master/src/System.Pri... Same is true for majority of third-party libraries: unsafe is supported by…
    comment by Const-me · 2019-06-19 · in Facebook picked Rust to implement Libra
  14. Yeah, I think this is the relevant bit: https://github.com/dotnet/coreclr/blob/master/Documentation/... Seems like they started trying speculative optimizations about six months ago. Speculative optimizations are not only the foundation of…
    comment by pron · 2019-06-17 · in A Race of Two Compilers: GraalVM JIT versus HotSpot JIT C2 [video]
  15. …And I think this goes into line with what you are discussing, https://github.com/dotnet/coreclr/pull/21270 I also agree that many things remain to be done in line with what Graal is capable of.
    comment by pjmlp · 2019-06-17 · in A Race of Two Compilers: GraalVM JIT versus HotSpot JIT C2 [video]
  16. CoreCLR started to implemented Tiered Compilation https://github.com/dotnet/coreclr/blob/master/Documentation/... It's experimental currently, no profile guided optimizations _yet_
    comment by lewurm · 2019-06-17 · in A Race of Two Compilers: GraalVM JIT versus HotSpot JIT C2 [video]
  17. On the Github repo is a roadmap for such a single file app.[1] [1] https://github.com/dotnet/coreclr/issues/20287#issuecomment-...
    comment by cheerlessbog · 2019-05-06 · in .NET 5
  18. I am hopeful .NET/C# will support[1][2][3] *BSD operating systems soon. [1] https://github.com/dotnet/coreclr/labels/os-freebsd [2] https://github.com/dotnet/corefx/labels/os-freebsd [3] https://github.com/dotnet/corefx/labels/os-netbsd
    comment by xvilka · 2019-05-03 · in Microsoft, currently the most valuable company, is having a Nadellaissance
  19. is it somehow related to "mixed mode assemblies"[1]? [1]: https://github.com/dotnet/coreclr/issues/18013
    comment by indentit · 2019-04-25 · in Running WebAssembly and WASI with .Net
  20. …pseudocode in my article. The “book of the runtime” has a graph visualizing these possibilities: https://github.com/dotnet/coreclr/blob/master/Documentation/... So this is a self-modifying code approach.
    comment by latk · 2019-04-18 · in Interface Dispatch (2018)
  21. Some of files open-sourced as part of CoreCLR still have a .cool file extension: https://github.com/dotnet/coreclr/blob/release/1.0.0/tests/s...
    comment by MarkSweep · 2019-04-01 · in C#88: The Original C# (2018)
  22. Still an open issue https://github.com/dotnet/coreclr/issues/25 The debugger in VS2017 does give the information, but I suspect thats just by re-evaluating the expression.
    comment by peteri · 2019-03-26 · in Add detailed message to NullPointerException describing what is null
  23. …memmove // TODO-ARM64-UNIX-OPT revisit when glibc optimized memmove is in Linux distros // https://github.com/dotnet/coreclr/issues/13844
    comment by voltagex_ · 2019-03-03 · in Is C# a low-level language?
  24. …See for example this implementation of memmove that is used for copying strings and other things: https://github.com/dotnet/coreclr/blob/7ddd038a33977b152e856...
    comment by MarkSweep · 2019-03-02 · in Is C# a low-level language?
  25. The C# runtime is also open source: https://github.com/dotnet/coreclr
    comment by nicoburns · 2019-02-03 · in Oracle's Newest Audit Tactic: Focusing on Java
  26. …Linux, macOS and a handful of [other] BSD derivatives. Sources: https://github.com/dotnet/roslyn https://github.com/dotnet/coreclr https://github.com/dotnet/corefx Binaries: https://dotnet.microsoft.com/download
    comment by paavohtl · 2019-01-27 · in Memory usage of a toy C# server and client with 500K concurrent connections on
  27. …at the moment - it doesn't work on any of the BSDs, for example. Someone's working on it, though. https://github.com/dotnet/coreclr/issues/18067
    comment by int_19h · 2018-12-04 · in Announcing .NET Foundation Open Membership
  28. …support fast Span<T> [2]. [1] https://www.nuget.org/packages/System.Memory/4.4.0-preview1-... [2] https://github.com/dotnet/coreclr/issues/18280#issuecomment-...
    comment by Mindless2112 · 2018-11-02 · in ASP.NET Core 3.0 will only run on .NET Core
  29. char ref (managed pointer) is cast to byte ref https://github.com/dotnet/coreclr/blob/04d9b557ef8b7c60a1194... Then it uses SpanHelpers.SequenceEqual for byte which is vectorized https://github.com/dotnet/coreclr/blob/04d9b557ef8b7c60a1194.…
    comment by benaadams · 2018-08-20 · in Bing.com now runs on .NET Core
  30. …Does vectorization not mean using SIMD instructions? It also means improving data dependencies? https://github.com/dotnet/coreclr/blob/48cb3fa29a63219a9669a...
    comment by kevindqc · 2018-08-20 · in Bing.com now runs on .NET Core
  31. …is experimenting with adding a native UTF-8 string in .NET next to the existing UTF-16 string: https://github.com/dotnet/coreclr/commits/feature/utf8string
    comment by MarkSweep · 2018-08-16 · in Introducing the Windows Pseudo Console (ConPty)
  32. …no reason to complain (and doesn't on Windows!), we can't target 32-bit Linux users. [1]: https://github.com/dotnet/coreclr/issues/9265
    comment by Wintereise · 2018-08-04 · in Where did the Microsoft tech stack disappear?
  33. …like whether it's a List<Integer> or List<int>. Secondly .NET doesn't do escape analysis at all: https://github.com/dotnet/coreclr/issues/1784 Thirdly HotSpot will happily escape analyze and then scalar replace regular objects, it isn't…
    comment by mike_hearn · 2018-07-17 · in Getting to Go: Garbage collection and runtime issues
  34. …including decent comments and things like the BOTR [0] is amazing for exploring the internals! [0]: https://github.com/dotnet/coreclr/tree/master/Documentation/...
    comment by matthewwarren · 2018-07-05 · in .NET JIT and CLR – Joined at the Hip
  35. …missed that scheduling. We're now looking at making the fix in a .NET Framework patch release. [1] https://github.com/dotnet/coreclr/issues/13388
    comment by runfaster2000 · 2018-06-19 · in Why Skylake CPUs Are Sometimes 50% Slower
  36. …mdbg is still nowhere to be found for CoreCLR [2]. 1: https://github.com/dotnet/core/issues/505 2: https://github.com/dotnet/coreclr/issues/1145 From what I've gathered, the best you have right now for doing command line debugging is the…
    comment by ubercow · 2018-06-16 · in Tools for Exploring .NET Internals
  37. …Turns out that even more components could be written in C#, but the ROI just isn't worth it, see https://github.com/dotnet/coreclr/issues/17576 for an interesting discussion
    comment by matthewwarren · 2018-06-08 · in CoreRT – A .NET Runtime for AOT
  38. As part of Google Summer of Code a participant is looking at porting .net core to FreeBSD https://github.com/dotnet/coreclr/issues/18067
    comment by tybit · 2018-05-31 · in Announcing .NET Core 2.1
  39. In general - yes: https://github.com/dotnet/coreclr/issues/1784 . However, nothing more specific I can say...
    comment by kkokosa · 2018-01-24 · in Allocation is cheap in .NET until it is not
  40. …tiered compilation. It never interprets the IR; everything is run through the same JIT compiler. https://github.com/dotnet/coreclr/issues/4331 HotSpot uses three tiers these days (counting direct interpretation as a tier) -…
    comment by MaxBarraclough · 2018-01-17 · in Firefox’s new streaming and tiering compiler
  41. …open source. .NET is open source under MIT. Come on. Are you living under a rock or something? https://github.com/dotnet/coreclr/blob/master/LICENSE.TXT
    comment by romanovcode · 2017-12-21 · in Ask HN: How good is the job market for .NET stack?
  42. …of high performance applications. As such, performance is a key design element for every change. https://github.com/dotnet/coreclr/blob/master/Documentation/...
    comment by benaadams · 2017-12-19 · in A Look at the Internals of 'Tiered JIT Compilation' in .NET Core
  43. …of the CLR is to make programming easy" In case anyone else is interested, that quote comes from https://github.com/dotnet/coreclr/blob/master/Documentation/...
    comment by matthewwarren · 2017-12-18 · in A Look at the Internals of 'Tiered JIT Compilation' in .NET Core
  44. …for such cases. This can now be written as: Span<byte> stackSpan = stackalloc byte[100]; See https://github.com/dotnet/coreclr/pull/14503/files as an example.
    comment by justinvp · 2017-11-19 · in Span<T> in C#
  45. …And this: https://stackoverflow.com/questions/27266907/no-appdomains-i... And did I mention this? https://github.com/dotnet/coreclr/pull/8677 As long as we have things like that, and as long as .NET Core continues to pander only to the…
    comment by Nuzzerino · 2017-11-13 · in Mono's New .NET Interpreter
  46. …a few comments/variables that mention it. Maybe this [1] is one of the tricky interactions? [0]: https://github.com/dotnet/coreclr/blob/master/src/vm/appdoma... [1]: https://github.com/dotnet/coreclr/blob/master/src/vm/appdoma...
    comment by matthewwarren · 2017-11-08 · in A DoS Attack Against the C# Compiler
  47. …free nor very open. .NET is released under MIT license[0]. What the hell are you talking about. [0] https://github.com/dotnet/coreclr/blob/master/LICENSE.TXT
    comment by romanovcode · 2017-10-08 · in StackOverflow Architecture (2016)
  48. …reduce memory consumption, mostly driven by the ports to other architectures (e.g. ARM, ARM32), see https://github.com/dotnet/coreclr/search?q=memory+consumptio...
    comment by matthewwarren · 2017-06-07 · in Performance Improvements in .NET Core
  49. …Just look at how much .NET Framework (Desktop) code they removed from CoreCLR earlier this year! - https://github.com/dotnet/coreclr/issues/8857 - https://github.com/dotnet/coreclr/issues/8763 - https://github.com/dotnet/coreclr/issues/4651…
    comment by matthewwarren · 2017-06-07 · in Performance Improvements in .NET Core
  50. …this being merged into the full framework. From what I can tell, from following the CoreCLR repo ( https://github.com/dotnet/coreclr ), it's changed over time. In the beginning the sources of the 2 were more closely tied, changes were…
    comment by matthewwarren · 2017-06-07 · in Performance Improvements in .NET Core