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Microsoft Teams has long been criticized for its sluggish performance on Windows, and the frustration is not just anecdotal. Despite ditching Electron in favor of WebView2, Teams still struggles with high RAM usage, slow startup times, and choppy calls. Microsoft is now taking a step to improve this experience by moving calling functionalities to a separate process, promising faster startup and smoother meetings for both enterprises and everyday users.
Microsoft Teams Performance Issues
For frequent Teams users, the experience can be frustrating. Even when idle, Teams often consumes up to 1 GB of RAM, and memory usage spikes significantly during meetings. While modern PCs handle heavy RAM loads, the real problem lies in the sluggish startup and general lag during everyday use. Teams is essentially a large web app that must log in, sync chats, pull calendars, load files, and connect to multiple Microsoft services simultaneously, contributing to its heavy footprint.
Administrators have highlighted in forums like Reddit that Teams launches slowly and feels cumbersome. During company-wide meetings, users report choppy audio, frozen video, and lagging PowerPoint shares. These issues have persisted despite Microsoft switching away from Electron, as WebView2, the framework currently powering Teams on Windows, introduces its own performance bottlenecks.
The Upcoming Change: ms-teams_modulehost.exe
Microsoft plans to introduce a new process called ms-teams_modulehost.exe in a January 2026 update. This process will handle all calling-related features independently from the main Teams process (ms-teams.exe), which continues to manage chats, messages, and UI components.
This separation is strategic. By isolating calls in their own process, performance issues affecting meetings will no longer compromise the rest of the Teams client. If a bug disrupts a call, the main interface continues running smoothly, improving reliability during critical work interactions.
Enterprise Rollout and Consumer Impact
The update will first appear in the Microsoft 365 Admin Center for enterprise users and gradually roll out to all Teams clients, completing by February 2026. Microsoft emphasizes that the new process does not change the UI or functionality, but users need to ensure antivirus software does not block ms-teams_modulehost.exe, a scenario that could occur in enterprise environments.
What Undercode Say: Performance Analysis and Implications
Microsoft’s decision to separate calling into a dedicated process is a clever workaround for a long-standing problem. While it doesn’t fix WebView2’s underlying inefficiencies, it does mitigate the impact of these inefficiencies on critical meeting functionalities. By isolating call features, Teams can now better manage system resources, preventing a single performance hiccup from freezing the entire app.
This approach mirrors strategies used in modern web browsers, which isolate tabs into separate processes to avoid total crashes. For organizations, this means fewer disruptions during meetings, smoother audio and video, and less frustration for IT teams managing Teams deployments.
However, it’s important to note that the root cause—Teams’ reliance on WebView2—remains unaddressed. WebView2, while convenient for web-based cross-platform functionality, is inherently resource-heavy on Windows. This has led to persistent issues not only in Teams but also in other Microsoft apps like the recent WhatsApp redesign, which moved from native code to WebView2 and similarly struggles with memory and launch times.
From a user experience perspective, separating processes improves reliability but does not eliminate the feeling of sluggishness. Startup times will remain slower than truly native apps, and resource usage may still feel bloated on older machines. Yet, this incremental improvement signals Microsoft’s recognition that Teams’ current architecture cannot continue to ignore performance complaints, especially in enterprise environments where uptime and smooth operation are critical.
This update also hints at Microsoft’s broader strategy: incremental fixes that do not disrupt core features but strategically optimize performance. Enterprises will appreciate the stability improvements, while casual users will enjoy fewer meeting interruptions. Ultimately, this is an acknowledgment that Teams has become a complex ecosystem that needs modular architecture to function efficiently.
For developers and IT managers, the new process model may open opportunities for better monitoring and troubleshooting of call-related issues without impacting the overall Teams experience. It also allows Microsoft to roll out more targeted updates in the future, focusing on specific problem areas rather than applying blanket fixes.
While Teams’ WebView2 framework remains a bottleneck, the ms-teams_modulehost.exe approach may set a precedent for other resource-heavy apps. Microsoft could potentially extend this model to other Teams features or Microsoft 365 apps that struggle with performance, creating a more modular, responsive suite of tools.
Fact Checker Results
✅ Microsoft confirmed moving Teams calling to a separate process starting January 2026.
✅ The main Teams process (ms-teams.exe) remains responsible for chat and UI.
❌ The update does not fully resolve WebView2-related performance issues.
Prediction
📊 By early 2026, users will notice faster meeting startups and more stable call experiences. However, unless Microsoft revisits WebView2, Teams will continue to feel heavier than native applications. Enterprises may adopt the update quickly due to improved reliability, while casual users may still experience overall sluggishness. Modular architecture improvements could inspire similar changes across Microsoft 365 apps, gradually enhancing performance without overhauling the entire platform.
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