ASP.NET Core Interview Question #176

Why is performance important in ASP.NET Core applications?

Performance, Caching & HTTP Senior Advanced

Quick Interview Answer

Performance affects response time, throughput, infrastructure cost, scalability, and user experience. A well-performing ASP.NET Core application avoids unnecessary blocking, allocations, database round trips, network calls, and repeated computation.

Detailed Explanation

Optimization should be measurement-driven. Profiling, metrics, traces, load tests, and database diagnostics help identify actual bottlenecks before code is changed.

Code Example

// Prefer asynchronous I/O for database/network work.
public async Task<Product?> GetAsync(
    int id, CancellationToken cancellationToken)
{
    return await _db.Products
        .AsNoTracking()
        .FirstOrDefaultAsync(p => p.Id == id, cancellationToken);
}