HttpClient Keep-Alive: Why Disabling Connection Reuse Can Destroy Performance

Disabling keep-alive in HttpClient can severely degrade application performance, as it prevents connection reuse. While it may be justified in rare cases, such as for legacy systems or troubleshooting, most reasons are misguided. Instead, maintain keep-alive for efficiency and configure PooledConnectionLifetime to manage connections effectively.

IO Performance: Reuse HttpClient to Avoid Connection Overhead

When populating collections in .NET, choosing the right bulk operation improves both clarity and efficiency. Methods like AddRange() and InsertRange() allow multiple items to be added in a single call, reducing overhead compared to repeated individual inserts and clearly expressing intent. When combined with proper capacity planning, these approaches help produce predictable, maintainable code—whether items are being appended or inserted at a specific position.