708 | mold | |
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12 | 179 | |
80 | 13,414 | |
- | - | |
1.8 | 9.7 | |
over 2 years ago | 3 days ago | |
C++ | C++ | |
Apache License 2.0 | MIT License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
708
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CppFront Parameter Passing Semantics
Herb's parameter passing paper describes five parameter semantics categories (in, inout, out, move, and forward) to replace C++'s parameter passing styles (value, reference, const reference, r-value reference, and forwarding reference). And it poses the question of how parameter passing semantics can reasonably be made visible at the call-site.
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Does Rust have any design mistakes?
Another design mistake, imho, is that Rust does not have Herb Sutter’s parameter passing style from his 708 paper. For example, out parameters instantly remove almost all use-cases for MaybeUninit, adding strong compiler guarantees and requiring zero unsafe code.
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Is C++ Doomed?
In my C++ code, I've copied Rust and expressed fallible initialization by returning a std::optional from a static method (which the article failed to mention). The problem is that (like Rust) you lose placement initialization, and (unlike C++ or Rust) you can't initialize private fields using aggregate initialization or initializer lists, and must write a passthrough constructor (which can't even be private because it breaks make_unique).
https://github.com/hsutter/708 is a C++ proposal which unifies placement constructors and writable out-parameters ("definite first use"). I don't think it makes placement initialization fallible, but I'm not sure.
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const all the things?
As noted elsewhere - we need in/out/forward.
- Three reasons to pass std::string_view by value
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Last reference as rvalue?
There is a proposal by Herb Sutter (708: Parameter passing -> guaranteed unified initialization and unified value-setting) that want to do just that.
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Experience C++ developers: do you enjoy using C++ (even for personal/hobby projects?)
Having said this, I can't wait for the dream to become reality
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Is pass-by-value slower than pass-by-rvalue-reference?
I am waiting for this to become reality, and C++ language to suddenly lose 98% of its annoyingness!
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All C++20 core language features with examples
Oh! That would be so nice. I mean, there is a proposal in the works, but I really doubt it will be adopted as it is.
- Proposal idea : attribute to force value assignment to default-constructible member in constructor
mold
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I reduced (incremental) Rust compile times by up to 40%
I think this is unlikely to gain traction. I say that no to discourage you, just to explain.
- The community has an instinctive distrust of closed source or a compiler from an untrusted source. If you’re familiar with the Trusting Trust attack you’ll understand why.
- Dev tools in every language ecosystem are almost always free, unless they involve some kind of hosting. People aren’t used to opening their wallets. Look the experience of the guy who built the mold linker(https://github.com/rui314/mold). Far superior to the state of art, improves incremental compiles a lot, widely applicable across ecosystems (C, C++, Rust), CPU architectures and Operating Systems. You don’t even have to modify your compiler, just need to point to his linker. He’s even giving it away for free for personal use. But still, almost no one uses it. The inertia of the established options is really high.
- It’s not complex enough. Think about the complexity involved in the cranelift backend. No one can seriously recreate the efforts of bjorn3. If we could have, we would have. But the idea idea here can be recreated, especially by the experts who already built incremental compilation into rustc.
- But if your solution is truly complex, like the parallel frontend, the burden of maintaining a fork would be too high. You’d have to spend all your time rebasing.
Again I’m not trying to discourage you, just stating the difficulties of making a business in the dev tools space. You would be better off contributing this excellent work to the community and trying a different tack.
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Mold Course
I initially thought this would be about the mold linker (https://github.com/rui314/mold)
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Monetizing Developer Tools
I assume this submission is trying to highlight the specific message (2023-01-24) : https://github.com/rui314/mold/issues/190#issuecomment-14028...
Fyi... the author wrote a more expansive blog post about selling dev tools a few months later (2023-06-06) and there was a related HN thread about it: https://news.ycombinator.com/item?id=36225016
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mold 2.1.0 - rui314/mold
Loongson's LoongArch CPU has been supported. (03b1a1c)
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Mold 2.0.0
I'm amazed at how quickly the author responds to requests: https://github.com/rui314/mold/issues/1057
From the report to the fix in less than two days.
I'm not sure how competitive it will be with lld, especially if we consider ThinLTO (which takes multiple minutes on 64-core machine) - it can make the advantages of mold insignificant.
- Mold 2.0 released - MIT license
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Linking many files significantly increases build time. Is there an editor that allows you to write a single file but present the file to the screen as multiple 'virtual' files for better organization?
What other solutions have you tried for the problem of slow linking? You haven't even said which linker and what flags you're using. I haven't actually tried it, but the author of gold has an even faster linker called mold: https://github.com/rui314/mold
- Design and Implementation of the Mold Linker
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Apple's new library format combines the best of dynamic and static
> Mold did it first, though: https://github.com/rui314/mold
Before LLD?
What are some alternatives?
dyno - Runtime polymorphism done right
zld - A faster version of Apple's linker
lang-team - Home of the Rust lang team
wasmtime - A fast and secure runtime for WebAssembly
rust - Empowering everyone to build reliable and efficient software.
osxcross - Mac OS X cross toolchain for Linux, FreeBSD, OpenBSD and Android (Termux)
semver-trick - How to avoid complicated coordinated upgrades
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
STL - MSVC's implementation of the C++ Standard Library.
chibicc - A small C compiler
rfcs - RFCs for changes to Rust
sccache - Sccache is a ccache-like tool. It is used as a compiler wrapper and avoids compilation when possible. Sccache has the capability to utilize caching in remote storage environments, including various cloud storage options, or alternatively, in local storage.