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Movie Monad – A GTK Video Player Built with Haskell

Filed under
Software
Movies

Yes, guys – another video player! “What’s special about this one?”, you ask. Well, for starters, it began as a (blog post project) for Haskell programmers interested in functional programming and who also have an interest in building GTK UI apps.

Movie Monad is a free, simple, and open-source GTK video player written in Haskell. If features a UI reminiscent of VLC Media Player, keyboard shortcuts, and the ability to play both local and remote files.

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As outlined yesterday, significant slowdowns with the Linux 4.20 kernel turned out to be due to the addition of the kernel-side bits for STIBP (Single Thread Indirect Branch Predictors) for cross-HyperThread Spectre Variant Two mitigation. This has incurred significant performance penalties with the STIBP support in its current state with Linux 4.20 Git and is enabled by default at least for Intel systems with up-to-date microcode. Here are some follow-up benchmarks looking at the performance hit with the Linux 4.20 development kernel as well as the overall Spectre and Meltdown mitigation impact on this latest version of the Linux kernel. Some users have said AMD also needs STIBP, but at least with Linux 4.20 Git and the AMD systems I have tested with their up-to-date BIOS/microcode, that hasn't appeared to be the case. Most of the AMD STIBP references date back to January when Spectre/Meltdown first came to light. We'll see in the week ahead if there is any comment from AMD but at this time seems to be affecting up-to-date Intel systems with the Linux 4.20 kernel. Read more

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