This document provides an overview of the IBM Notes client version 9.0.1 and discusses factors that can impact the startup and performance of the Notes client. It describes how the client has increased significantly in files and settings over time. Key factors that can slow startup include outdated hardware, antivirus scanning, and older ODS database formats. For performance, using SSDs instead of HDDs, optimizing network settings, avoiding unnecessary plugins, and maintaining an optimized cache.ndk file are recommended. The document demonstrates how to measure client performance and provides tips for optimizing the client environment.