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You can achieve amazing concurrency and performance using async Rust, but working with async Rust is not as simple as writing regular Rust code and it just doesn't provide you the same features as Elixir Processes do.
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The processes spawned by Lunatic are actually taking full advantage of the power provided by async Rust. They are scheduled on top of a work stealing async executor, the same used by async-std. Calling Process::sleep(100) will actually invoke smol's at function.
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SonarLint
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I also want to use this opportunity to say a big thank you to the teams working on Rust, Wasmer, Wasmtime, Lucet and waSCC. It would be impossible to build Lunatic without all the hard work put into this projects.
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This is just a teaser of the capabilities that Lunatic will provide. There are many more features coming. Once you have this foundation, a new world of possibilities opens up. Some of the features I'm excited about:
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libfringe
a Rust library implementing safe, lightweight context switches, without relying on kernel services
As we saw earlier, scheduling threads is a hard task for the operating system. To replace one thread that's being executed with another one, a lot of work needs to be done (including saving all the registers and some thread state). However, switching between Lunatic Processes does only the minimal amount of work possible. With an idea pioneered by the libfringe library and using some asm! macro magic, Lunatic lets the Rust compiler figure out the minimal number of registers to be preserved during context switches. This makes scheduling Lunatic processes zero-cost. On my machine usually 1ns, equivalent to a function call.
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InfluxDB
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