TL;DR Problem: Loading taxonomy fields via CSOM for SharePoint list items with many terms is painfully slow. Including taxonomy fields in ViewFields makes the initial query extremely expensive. Solution: Batch-load items in chunks, use FieldValuesForEdit to get raw taxonomy data, and parse the …

TL;DR Problem: Client making 90,000 CSOM calls/month, 88% were redundant EnsureUser operations for users already on the site. Solution: Use FieldUserValue.FromUser() optimistically with ExceptionHandlingScope for server-side try-catch logic. Impact: 75-85% reduction in API calls (90,000 → …

The Problem: One-by-One Operations Kill Performance Following up on my previous post about DevProxy and throttling testing, there’s another critical performance issue I see regularly in SharePoint CSOM code: executing operations one by one instead of batching them. Consider this common pattern …