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ReSharper/Rider 2025.3 Release Party

JetBrainsDecember 10, 202559m
Topics41
Release Party Introduction0:12Performance Improvements4:00UI Changes - Island Theme6:02C# 14 Support9:30Exception Handling Assistance13:00ReSharper Plugin for Visual Studio Code15:02F# Plugin Development18:02F# Type Inference and Integration21:30Cross-Language Type Quick Fixes24:32F# Pipeline and Future Features27:30Extension Members and Operator Piping in F#30:46Push to Hint Feature Origin31:01Jenna's Role and Contributions32:32OpenTelemetry Plugin Development33:30OpenTelemetry Plugin Features34:31HTTP Requests and OpenTelemetry Integration35:30Trace Examination Feature38:00AI Integration and MCP39:00AI Chat Streamlining39:30Juny Plugin Installation40:31AI Quota Usage Transparency41:03Bring Your Own Key (BYO Key) Feature42:00AI Philosophy and Agent Choice43:01Agent Client Protocol Support44:00Development Approach History44:30Parallel Development Preference46:01Game Development Updates46:32Completion Key Configuration47:30Perforce MCP Server Support48:32IL Viewer for Unity49:03Unreal Engine Performance and Debugging49:31Const Expression Debugging50:30GDScript Support52:01Pre-processor Branch Highlighting53:00Pre-processor Complexity54:01Other JetBrains Products55:02Upcoming Q&A Event56:01Blog Content and User Stories56:31Community License Projects57:30Closing Remarks59:14Final Thank You59:30
In a Nutshell

ReSharper/Rider 2025.3 delivers major performance gains in startup, navigation, and code completion, plus day-zero C# 14 support with extension members and new exception-handling assistance. The island UI introduces independent brightness/contrast controls, while AI chat unifies Juny and other agents with quota transparency and upcoming BYO-key support. F# gains cross-language type fixes, GDScript expands, and Unreal debugging now handles const expressions and Android mobile call stacks.

AI-Generated Notes

These notes were generated by AI and may contain inaccuracies.

ReSharper and Rider 2025.3 represents the final major release of the year, though smaller updates will continue to be released. The stream is being recorded for later viewing by those unable to attend live.

A Reddit AMA will be held the following day featuring the entire team including developers, QA, planning, and dev advocates. Questions can cover any topic about how the products work or future plans.

Significant performance gains were achieved across multiple areas, particularly in code completion, search, and navigation. File navigation access is now even faster than previous versions. Startup performance received focused attention with reductions in initialization frequency, improved cache loading, and optimizations for both cold starts and warm starts. Further performance work is planned for subsequent releases.

Game development initialization saw particular improvements with up to 20% faster loading times for previously opened Unreal solutions. Cached data enables quicker subsequent reopens of solutions.

The new island UI has been available in Early Access Program builds and received positive user feedback. The major release now includes this UI update. Users can customize brightness and contrast between the main editor and tool windows independently. This addresses feedback about eye strain from high contrast, allowing lower contrast options for different tool windows as needed.

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