darwin-libplatform
abseil-cpp
darwin-libplatform | abseil-cpp | |
---|---|---|
7 | 54 | |
126 | 14,025 | |
- | 1.8% | |
0.0 | 9.5 | |
over 3 years ago | 4 days ago | |
C | C++ | |
Apache License 2.0 | Apache License 2.0 |
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.
darwin-libplatform
- Conseils d'achat pc (très) portable ?
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What is inferior to macOS to Windows? (in addition to games, etc.)
Apple Open Source Resources
- Apple releases a Game Porting Tool, based on open-source platform Wine, which can translate DirectX 12 into Metal 3, a potentially massive step for Mac gaming
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Apple’s new Proton-like tool can run Windows games on a Mac
Apple does plenty of open source stuff. Safari's browser engine, Swift, libdispatch, the XNU kernel used by iOS and macOS, etc. And macOS is generally packed with open source things, like the default shell, zsh. Also, Metal actually predates Vulkan, so Vulkan was definitely not established when they started focusing on Metal. Yeah, they probably should consider supporting Vulkan now, but it's nothing to do with open source. The main beneficiaries of Apple supporting Vulkan would be people porting closed-source games.
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DirectX 12 Support on macOS
It's still not a great thing to do. Apple used to contribute a lot more, even if some of their stuff was exclusive to their platform. https://opensource.apple.com
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Improving Firefox Responsiveness on macOS
There's quite a bit of macOS that's open source. The author links to source code in Firefox, and that source code has links to Apple's source code:
> // For information about the following undocumented flags and functions see
> // https://github.com/apple/darwin-xnu/blob/main/bsd/sys/ulock.... and
> // https://github.com/apple/darwin-libplatform/blob/main/privat...
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A Close Look at a Spinlock
Yes, but it's not so uncommon for "spinlocks" to evolve into not-actually-spinlocks. In the Linux kernel, spinlock_t is actually a mutex if PREEMPT_RT is enabled [1]. And Darwin has some code to do this in userspace [2], although I'm not sure if it's actually used.
[1] https://www.kernel.org/doc/html/latest/locking/locktypes.htm...
[2] https://github.com/apple/darwin-libplatform/blob/main/src/os...
abseil-cpp
- Sane C++ Libraries
- Open source collection of Google's C++ libraries
- Is Ada safer than Rust?
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Appending to an std:string character-by-character: how does the capacity grow?
Yeah, it's nice! And Abseil does it, IFF you use LLVM libc++.
https://github.com/abseil/abseil-cpp/blob/master/absl/string...
The standard adopted it as resize_and_overwrite. Which I think is a little clunky.
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Shaving 40% Off Google’s B-Tree Implementation with Go Generics
This may be confusing to those familiar with Google's libraries. The baseline is the Go BTree, which I personally never heard of until just now, not the C++ absl::btree_set. The benchmarks aren't directly comparable, but the C++ version also comes with good microbenchmark coverage.
https://github.com/google/btree
https://github.com/abseil/abseil-cpp/blob/master/absl/contai...
- Faster Sorting Beyond DeepMind’s AlphaDev
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“Once” one-time concurrent initialization with an integer
An implementation of call_once that accommodates callbacks that throw: https://github.com/abseil/abseil-cpp/blob/master/absl/base/c...
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[R] AlphaDev discovers faster sorting algorithms
I wouldn't say it's that cryptic. It's just a few bitwise rotations/shifts/xor operations.
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Deepmind Alphadev: Faster sorting algorithms discovered using deep RL
You can see hashing optimizations as well https://www.deepmind.com/blog/alphadev-discovers-faster-sort..., https://github.com/abseil/abseil-cpp/commit/74eee2aff683cc7d...
I was one of the members who reviewed expertly what has been done both in sorting and hashing. Overall it's more about assembly, finding missed compiler optimizations and balancing between correctness and distribution (in hashing in particular).
It was not revolutionary in a sense it hasn't found completely new approaches but converged to something incomprehensible for humans but relatively good for performance which proves the point that optimal programs are very inhuman.
Note that for instructions in sorting, removing them does not always lead to better performance, for example, instructions can run in parallel and the effect can be less profound. Benchmarks can lie and compiler could do something differently when recompiling the sort3 function which was changed. There was some evidence that the effect can come from the other side.
For hashing it was even funnier, very small strings up to 64 bit already used 3 instructions like add some constant -> multiply 64x64 -> xor upper/lower. For bigger ones the question becomes more complicated, that's why 9-16 was a better spot and it simplified from 2 multiplications to just one and a rotation. Distribution on real workloads was good, it almost passed smhasher and we decided it was good enough to try out in prod. We did not rollback as you can see from abseil :)
But even given all that, it was fascinating to watch how this system was searching and was able to find particular programs can be further simplified. Kudos to everyone involved, it's a great incremental change that can bring more results in the future.
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Backward compatible implementations of newer standards constructs?
Check out https://abseil.io. It offers absl::optional, which is a backport of std::optional.
What are some alternatives?
libplatform
Folly - An open-source C++ library developed and used at Facebook.
Whisky - A modern Wine wrapper for macOS built with SwiftUI [Moved to: https://github.com/Whisky-App/Whisky]
Boost - Super-project for modularized Boost
xnu
spdlog - Fast C++ logging library.
Apple-Silicon-Guide - Apple Silicon Guide. Learn all about the A17 Pro, A16 Bionic, R1, M1-series, M2-series, and M3-series chips. Along with all the Devices, Operating Systems, Tools, Gaming, and Software that Apple Silicon powers.
Qt - Qt Base (Core, Gui, Widgets, Network, ...)
simple-tab-groups - Create, modify and quick change tab groups. Inspired by the Tab Groups app :)
EASTL - Obsolete repo, please go to: https://github.com/electronicarts/EASTL
BDE - Basic Development Environment - a set of foundational C++ libraries used at Bloomberg.
MPMCQueue.h - A bounded multi-producer multi-consumer concurrent queue written in C++11