Question

I have an existing ASP.NET 2.0 web service serves several WinForms clients. In our application, We belive we have performance problem in several levels.

1. Sending toomuch data in syncrounous
   request
2. Lazy loading, Too many round trip
   between web service and database
3. POCO <-> Sql object mapping using
   untyped datasets and reflection[no
   caching]

This is an existing application with large code base, I would like to instrument this app to find out hotspots.

1. How can I instrument remote apps
   like winforms client deployed in
   remote places?
2. How can I instrument Web Service?
3. Edit** Are there any profilers better than VS profiler?
4. Can I trust the profilers to tell me the
   hot spots, so I don’t pollute my code
   with instrumentation? Or Do I have
   to take the middle road, profiler +
   instrumentation?

Answer 1

This may help:
ASP.NET and WorkerThreads – Interesting performance tweaks
20 Tips to Improve ASP.net Application Performance
Use Custom Http Handlers To Improve Performance in ASP.NET
Best practices for ASP.Net applications
Scaling Strategies for ASP.NET Applications