What is the issue with SPWeb in Sharepoint concerning an excessive amount of items in Powershell?

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When there is an excessive amount of items in a SharePoint site, the use of the SPWeb PowerShell cmdlets can cause performance issues such as slow response times, timeouts, and even resource depletion. This is because the SPWeb cmdlets load all the items in memory before processing them, which can be problematic when dealing with large amounts of data. Additionally, using the SPWeb cmdlets to retrieve or manipulate large amounts of data can adversely affect the performance of other users accessing the SharePoint site.