Decent profiler for Windows? [duplicate]

Answer 1

For Windows, check out the free Xperf that ships with the Windows SDK. It uses sampled profile, has some useful UI, & does not require instrumentation. Quite useful for tracking down performance problems. You can answer questions like:

Who is using the most CPU? Drill down to function name using call stacks.

Who is allocating the most memory?

Outstanding memory allocations (leaks)

Who is doing the most registry queries?

Disk writes? etc.

Answer 2

Luke Stackwalker seems promising -- it's not as polished as I'd like, but it is open source and it does do something that seems very close to what @Mike Dunlavey keeps saying we ought to do. (Of course, it then tries to smoosh it all down into the typically-unhelpful call graphs that Mike is so weary of, but it shouldn't be too hard to fix that with the source as our ally.)

It even seems to count time spent waiting in the kernel, as far as I can tell...

Answer 3

We use both VTune and AQTime, and I can vouch for both. Which works best for you depends on your needs. Both have free trial versions - I suggest you give them a go.