In a backend API, the main benefit is scalability during I/O waits. While the database, another service, or storage is working, an incomplete await allows the request thread to return to the pool instead of blocking. That thread can serve other requests. Async does not make the remote dependency faster; it uses server threads more efficiently. ```csharp [HttpGet("{id:guid}")] public async Task<ActionResult<OrderDto>> Get( Guid id, CancellationToken ct) { var order = await db.Orders .AsNoTracking() .Where(item => item.Id == id) .Select(item => new OrderDto(item.Id, item.Total)) .SingleOrDefaultAsync(ct); return order is null ? NotFound() : Ok(order); } ``` The benefit appears only when the whole path uses genuine asynchronous APIs. Calling `.Result`, `.Wait()`, or wrapping synchronous database I/O in `Task.Run` still consumes threads and can cause starvation under load. Pass request cancellation, apply timeouts, and measure throughput and latency.
Prince Yadav · · 0 likes