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Redox OS Unlocks Faster VM Performance, "Slightly Faster" Than Linux In Some Benchmarks
The Rust-written Redox OS open-source operating system has managed to address a performance bottleneck allowing this platform to perform much faster now when running as a virtual machine (VM) and for some synthetic benchmarks even able to run 'slightly faster' than Linux.
Due to a "huge bottleneck" in their context switching code around reading system time, their VM performance is now much faster although no speed-ups for running Redox OS on bare metal hardware. "Thanks to the recent kernel proflling implementation, 4lDO2 discovered that a huge bottleneck in the context switching code, was simply reading the system time. ... Running in a VM, Redox is now becoming slightly faster than Linux at certain synthetic benchmarks, for example the same-core context switch latency when using POSIX pipes (tested with mitigations=off).
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