Top 9 C# High Performance Projects

ServiceStack

2 5,345 9.8 C#

Thoughtfully architected, obscenely fast, thoroughly enjoyable web services for all
Fusion

23 1,789 9.6 C#

Build real-time apps (Blazor included) with less than 1% of extra code responsible for real-time updates. Host 10-1000x faster APIs relying on transparent and nearly 100% consistent caching. We call it DREAM, or Distributed REActive Memoization, and it's here to turn real-time on!

Project mention: Show HN: Actual Chat – Blending text and voice into a single medium | news.ycombinator.com | 2023-12-08

- Even frequent exchanges like, “Hey, I’m heading to Costco, need anything?” where the follow-up is easier spoken than typed, or may require a brief brainstorming - “Oh, remember our neighbors are visiting us on Sunday?”
That’s how 8 years later (2 years ago) me and my co-founder decided to implement a new chat app.
— Technology —
To make it short, I’ll post just one point here: Actual Chat is based on Fusion (https://github.com/servicetitan/Stl.Fusion) - think MobX / computed observables, but distributed. In Actual Chat, the state it manages spans from our servers to every client app, creating an eventually consistent “state mesh”. The unified state management, where clients and servers use exactly the same abstraction to “observe” the changes happening to any bit of content, is quite a challenge from the technology standpoint. IMO it alone deserves a brief look.
P.S. Thank you for reading up to this point!
WorkOS

workos.com
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The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.
SmartSql

0 1,044 5.9 C#

SmartSql = MyBatis in C# + .NET Core+ Cache(Memory | Redis) + R/W Splitting + PropertyChangedTrack +Dynamic Repository + InvokeSync + Diagnostics
FastEnum

1 305 5.9 C#

The world fastest enum utilities for C#/.NET
NetStack

2 293 0.0 C#

Lightweight toolset for creating concurrent networking systems for multiplayer games
fast-cache

1 57 8.0 C#

The fastest cache library written in C# for items with set expiration time. Easy to use, thread-safe and light on memory.
DotMP

1 24 9.7 C#

A collection of powerful abstractions for parallel programming in .NET with an OpenMP-like API.
InfluxDB

www.influxdata.com
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Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
DynamicGrid

2 12 4.1 C#

High performance WinForms grid rendering engine. (by TomaszRewak)
tsunami

1 6 7.1 C#

A High Performance C# wrapper that allows you to get the benefits of SIMD Intrinsics on List<T>. (by gregyjames)

Project mention: GitHub - gregyjames/tsunami: A High Performance C# wrapper for working with Vector<T> for SIMD Intrinsics. It allows you to get all the performance benefits of SIMD instructions without having to worry about things like memory management, resizing inputs or dealing with the Vector type. | /r/coolgithubprojects | 2023-06-15

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2023-12-08.