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robinm

@ robinm @programming.dev

Posts
2
Comments
133
Joined
2 yr. ago

  • rustc_codegen_gcc: Progress Report #25

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  • The devil is really is the details. One year ago, I felt that the progress was moving so fast I had the feeling that it was close to being finished, but it seems toat it's much more complex than what I thought. Nonetheless, congratulation to all contributors!

  • rustc_codegen_gcc: Progress Report #25

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  • As far as I know, adding the support for restrict didn’t trigger any bugs in GCC

    That's very impressive for gcc. IIRC adding restrict to LLVM triiggered major bugs and miscompilations at least for the first two attempts. As they said they need to do a crater run to be sure, but even passing the initial smoke test is an achievement for gcc.

    However, I'm surprised the code is “only” 3% faster using restric annotation. IIRC the speed-ups were about 5% for LLVM so maybe there is still some performance to gain on the gcc side?

  • Most and Least Verbose Programming Languages

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  • You have not read enough code from IOCCC.

  • Why Linux is better for (most) developers!

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  • And cgdb is kind of the same but with better controls and syntax coloration.

  • The Little Things: The Missing Performance in std::vector

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  • That's totally right but I thought you were talking about signed numbers since you said “integer overflow”. I forgot that len is usually unsigned in C++.

  • The Little Things: The Missing Performance in std::vector

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  • emplace controls the construction of the object added to the collection. It's also important but not related to the problem exposed by OP which is “how to remove the capacity check when we know statically that there is enough space”.

  • GNOME 45's Nautilus File Manager Gets a Modern Full-Height Sidebar Layout

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  • I use win+arrow key quite a lot too.

  • The Little Things: The Missing Performance in std::vector

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  • In C++ integer overflow is UB so this edge case cannot exist

  • The Little Things: The Missing Performance in std::vector

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  • Couldn't this be solved by having push_back being an inline function (or at least the check on capacity being inlined and the rest of the non-trivial part being in a sub non-inline function)?

  • Opinions on how to deal with duplicate code.

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  • There are 2 metrics that need to be considered:

    • easy to read
    • easy to modify

    The first point is by far the most important. Usually DRY win because less code means less to read so less to put in your head. But if the abstraction is too complicated (for example because there are two many parameteres) then it's worth considering drying.

    And don't forget the second point, but do not overthing and YAGNI. Sometime a simple comment “don't forget to update method foobar()” is enough. Don't forget either that you can always rewrite the abstraction when you need to modify something (if the original did not fit your new requirements), but for this to be an easy task, the understanding of the original abstraction must be crystal clear. That's why the first point is so important.

  • Climate extremists

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  • There is no need for personnal attacks when someone is wrong.

  • 4 year old got her first linux kernel patch accepted

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  • And you should not forget that Emacs is way harder when you are 4 because your hands are smaller!

  • 4 year old got her first linux kernel patch accepted

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  • So cute!

  • New features on lib.rs

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  • It's also quite opinated (which I consider a good thing) so that what the author of lib.rs considers relevant crates are shown first.