highway
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.
jpeg-xl
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Google's decision to deprecate JPEG-XL emphasizes the need for browser choice and free formats
I believe JXL's reference implementation isn't even to version 1 yet. 0.8.1 appears to be the latest. I could see them revisiting this once the reference implementation is considered complete.
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Very large (DICOM) microscopy images region and resolution transcoding tiling and resolutions
I asked for this a while ago, not sure how things have progressed since then.
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H.264 is magic: a technical walkthrough
That license doesn't say anything about patents. This one does: https://gitlab.com/wg1/jpeg-xl/-/blob/main/PATENTS and only says that patents owned by Google are covered. So it may be that other companies patent the technology. The information in the repository is not enough to decide whether JPEG XL is safe to use.
- https://gitlab.com/wg1/jpeg-xl
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I am a co-creator of JPEG XL (.jxl), a new image format. AMA!
The GIMP plugin is a great thing. But it still can't open/save images with special chars in their filenames. French, German and many other languages are affected. Could this be fixed soon? https://gitlab.com/wg1/jpeg-xl/-/issues/184
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Here's my googledrive of every current raw scan of my vintage 35mm slide collection of world travel and random families taken from estate sales around the world. Originally scanned 4800-6400dpi as .TIFFs but these are .jpegs. Feel free to comment your insight or download the whole thing. 2000+
https://gitlab.com/wg1/jpeg-xl/-/blob/main/doc/developing_in_windows.md It's not as straight-forward to build as it is on Linux. I'm not sure if there are official binaries somewhere, sorry.
- Improvements to the ubiquitous JPEG image format used across the internet will bring global bandwidth savings of 30 per cent, say the creators of the new technology, who have made it royalty-free.
- Is it possible to convert jxl directly to jxl?
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JPEG XL website and conformance testcases published on GitHub
I'm guessing the reference implementation with complete git history is soon to follow? https://gitlab.com/wg1/jpeg-xl
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JPEG XL support has been added to Firefox Nightly! (90.0a1 (2021-05-09)
The file format was 'frozen' last December: https://gitlab.com/wg1/jpeg-xl/-/tags/v0.2 Which is why FF can start implementing its usage.
highway
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Llamafile 0.7 Brings AVX-512 Support: 10x Faster Prompt Eval Times for AMD Zen 4
The bf16 dot instruction replaces 6 instructions: https://github.com/google/highway/blob/master/hwy/ops/x86_12...
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JPEG XL and the Pareto Front
[0] for those interested in Highway.
It's also mentioned in [1], which starts off
> Today we're sharing open source code that can sort arrays of numbers about ten times as fast as the C++ std::sort, and outperforms state of the art architecture-specific algorithms, while being portable across all modern CPU architectures. Below we discuss how we achieved this.
[0] https://github.com/google/highway
[1] https://opensource.googleblog.com/2022/06/Vectorized%20and%2..., which has an associated paper at https://arxiv.org/pdf/2205.05982.pdf.
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Gemma.cpp: lightweight, standalone C++ inference engine for Gemma models
Thanks so much!
Everyone working on this self-selected into contributing, so I think of it less as my team than ... a team?
Specifically want to call out: Jan Wassenberg (author of https://github.com/google/highway) and I started gemma.cpp as a small project just a few months ago + Phil Culliton, Dan Zheng, and Paul Chang + of course the GDM Gemma team.
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From slow to SIMD: A Go optimization story
C++ users can enjoy Highway [1].
[1] https://github.com/google/highway/
- GDlog: A GPU-Accelerated Deductive Engine
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Designing a SIMD Algorithm from Scratch
At that point it is better to have some kind of DSL that should not be in the main language, because it would target a much lower level than a typical program. The best effort I've seen in this scene was Google's Highway [1] (not to be confused with HighwayHash) and I even once attempted to recreate it in Rust, but it is still distanced from my ideal.
[1] https://github.com/google/highway
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SIMD Everywhere Optimization from ARM Neon to RISC-V Vector Extensions
Interesting, thanks for sharing :)
At the time we open-sourced Highway, the standardization process had already started and there were some discussions.
I'm curious why stdlib is the only path you see to default? Compare the activity level of https://github.com/VcDevel/std-simd vs https://github.com/google/highway. As to open-source usage, after years of std::experimental, I see <200 search hits [1], vs >400 for Highway [2], even after excluding several library users.
But that aside, I'm not convinced standardization is the best path for a SIMD library. We and external users extend Highway on a weekly basis as new use cases arise. What if we deferred those changes to 3-monthly meetings, or had to wait for one meeting per WD, CD, (FCD), DIS, (FDIS) stage before it's standardized? Standardization seems more useful for rarely-changing things.
1: https://sourcegraph.com/search?q=context:global+std::experim...
2: https://sourcegraph.com/search?q=context:global+HWY_NAMESPAC...
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Permuting Bits with GF2P8AFFINEQB
Thanks for the link. We were previously using GFNI for bit reversal and 8-bit shifts, and I just extended that to our 8-bit BroadcastSignBit (https://github.com/google/highway/pull/1784).
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Six times faster than C
You could study Google's Highway library [1].
[1] https://github.com/google/highway
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AMD EPYC 97x4 “Bergamo” CPUs: 128 Zen 4c CPU Cores for Servers, Shipping Now
Runtime feature detection need not be rare nor hard, it's a few dozen lines of boilerplate. You can even write your code just once: see https://github.com/google/highway#examples.
What are some alternatives?
sharp - High performance Node.js image processing, the fastest module to resize JPEG, PNG, WebP, AVIF and TIFF images. Uses the libvips library.
xsimd - C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE))
jxl-winthumb - A JPEG XL (*.jxl) thumbnail handler for Windows File Explorer.
Vc - SIMD Vector Classes for C++
Video-Hub-App - Official repository for Video Hub App
swup - Versatile and extensible page transition library for server-rendered websites 🎉
GD - GD Graphics Library
DirectXMath - DirectXMath is an all inline SIMD C++ linear algebra library for use in games and graphics apps
highway - Highway - A Modern Javascript Transitions Manager
riscv-v-spec - Working draft of the proposed RISC-V V vector extension
cavif-rs - AVIF image creator in pure Rust
ispc - Intel® Implicit SPMD Program Compiler