C# Dev Kit 11.0 Rearchitected for Performance and Memory Improvements

Version Alignment and Rearchitecture

C# Dev Kit has released version 11.0, aligning its version number with the current .NET 11 release. This new version represents a complete rearchitecture of the C# Dev Kit, moving from the previous version 3.3.

The rearchitecture focuses on delivering significant improvements in performance and memory usage for developers using the kit.

Faster Load Times for Large Solutions

The updated C# Dev Kit demonstrates faster load times, particularly for large solutions like Orleans (155 projects) and Aspire (407 projects). Measurements show quicker availability of language support for active files and the entire solution.

This improvement allows developers to start working on an active file while the rest of the workspace loads in the background, maintaining consistent performance regardless of project count.

Project Caches and Process Consolidation

Key to the faster loading is the introduction of project caches. The kit no longer rebuilds its understanding of every project on each open, making language services, tests, and launch targets available almost immediately after the initial load.

Additionally, the new version consolidates six previously separate managed processes into a single process. This change reduces overhead associated with launching multiple processes, including AV checks, disk loading, and JIT compilation.