abseil-cpp
spdlog
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abseil-cpp | spdlog | |
---|---|---|
54 | 44 | |
13,917 | 22,172 | |
2.4% | - | |
9.5 | 8.9 | |
2 days ago | 14 days ago | |
C++ | C++ | |
Apache License 2.0 | MIT |
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.
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.
spdlog
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Show HN: Logfmtxx – Header only C++23 structured logging library using logfmt
Why a new lib instead of using or contributing to an existing one as spdlog?
https://github.com/gabime/spdlog
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C++ Game Utility Libraries: for Game Dev Rustaceans
GitHub repo: gabime/spdlog
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Easy logging A logging system for c++20
SpdLog https://github.com/gabime/spdlog
- Blackbox library for embedded systems
- cpp macros
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Compiled logging library suggestion(s)?
The usual recommendation when logging libraries are brought up is spdlog, which is however header-only. It's available on Conan-center.
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What a good debugger can do
* Aha! In digging up the docs for NDC, I found this[1], which does mention a book for your reading list: "Patterns for Logging Diagnostic Messages" part of the book "Pattern Languages of Program Design 3" edited by Martin et al.
[1] https://github.com/gabime/spdlog
- Does spdlog::get()->critical throw?
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CMake question
FetchContent_Declare( spdlog GIT_REPOSITORY https://github.com/gabime/spdlog GIT_TAG origin/v1.x ) FetchContent_MakeAvailable(spdlog)
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I want to slightly change the behavior of the std::cout
Typically, you'd use a logging library to handle stuff like this. I personally like spdlog. You use different logger functions (info, warn, error) and depending on what level you have set for the logger (or globally) some of the functions become no-ops. E.g. When not running in verbose mode all spdlog::info() do nothing.
What are some alternatives?
Folly - An open-source C++ library developed and used at Facebook.
glog - C++ implementation of the Google logging module
Boost - Super-project for modularized Boost
Boost.Log - Boost Logging library
Qt - Qt Base (Core, Gui, Widgets, Network, ...)
easyloggingpp - C++ logging library. It is extremely powerful, extendable, light-weight, fast performing, thread and type safe and consists of many built-in features. It provides ability to write logs in your own customized format. It also provide support for logging your classes, third-party libraries, STL and third-party containers etc.
EASTL - Obsolete repo, please go to: https://github.com/electronicarts/EASTL
G3log - G3log is an asynchronous, "crash safe", logger that is easy to use with default logging sinks or you can add your own. G3log is made with plain C++14 (C++11 support up to release 1.3.2) with no external libraries (except gtest used for unit tests). G3log is made to be cross-platform, currently running on OSX, Windows and several Linux distros. See Readme below for details of usage.
BDE - Basic Development Environment - a set of foundational C++ libraries used at Bloomberg.
plog - Portable, simple and extensible C++ logging library
MPMCQueue.h - A bounded multi-producer multi-consumer concurrent queue written in C++11
log4cplus - log4cplus is a simple to use C++ logging API providing thread-safe, flexible, and arbitrarily granular control over log management and configuration. It is modelled after the Java log4j API.