Why Rider and ReSharper Were Slow to Start, and How Microsoft Helped Fix the Problem

When we launched ReSharper’s out-of-process (OOP) architecture, users reported slower startup times for IDEs using ReSharper on Windows. After profiling, the cause surprised us: Microsoft Defender was scanning our process for longer than we expected. This post is about what we found, what we learned working with Microsoft, and a tool we built that allows

1 source Published 2026-10-07 07:56 UTC