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This talk is focused on how the RPC & Serializer in Orleans work and how they are designed for high performance. Rather than being Orleans 101, it's a perf-focused look under the hood. Some examples Down pointing backhand index

Down pointing backhand index

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Konrad Kokosa

@konradkokosa

· Oct 6

Smiling face with heart-shaped eyes

Lead for Microsoft Orleans @ReubenBond about "A Deep Dive into Orleans" youtube.com/watch?v=kgRag4

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Orleans includes a powerful, flexible, high-perf, version-tolerant serializer & RPC. Serializer perf:

2:10 PM · Oct 6, 2021Twitter Web App

Daniel Markham

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Designing internal APIs/types which are amenable to high-perf is something best done up-front, drawing from your past experience.

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You can have low-cost abstraction by creating generic types and specializing them using value-typed parameters, allowing the JIT to remove type checks and eliminate dead code

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In order to support flexible RPC which is also high-performance (to serialize, deserialize, & invoke), we generate per-method closure types. This eliminates the quagmire of method overload resolution and allows for very cheap introspection for middleware

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I mention some issues inherent with optimizing for microbenchmarks in the talk. You may end up with code which benchmarks well but is selfish. Eg, the generated deserializer code here is fast and friendly to the CPU's branch predictor, but less efficient for the instruction cache

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I mentioned this (old but relevant) blog post in the talk: reubenbond.github.io/posts/dotnet-p It gives some advice on perf tuning .NET code

reubenbond.github.io

reublog - Performance Tuning for .NET Core

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Quite happy to see that System.Text.Json performs quite well compared to others!

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Lower is better in these benchmarks, so System.Text.Json is only beating out Newtonsoft.Json here. I imagine it's performance will be improved, but it's not there yet in my books

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Is this IL based serializer or classic binary serializer?

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This is a new serializer which uses a C# Source Generator

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Stefán Jökull Sigurðarson - CCP Ghostrider

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Now I know what code I need to look at for a little inspiration ;)

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Iuri L. Machado

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Does it work with F#?

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