Tracing release builds

[tthmic]

Hi,

I'm trying to understand how tracing is done for a release build. I can't find anything on the internet, which (in my experience) is usually a sign that either it's painfully obvious and I haven't found it, or that it's not even an issue at all.

When everything is setup to view tracing using tokio-console, I can't build a release version. As a result, I imagine the tracing is slightly misrepresentative of the release performance.

My questions are as follows:

1. Should I be able to build a release version while the tokio tracing feature is enabled, and the tokio_unstable flag is set?
2. Will my threads execute notably faster in a release build?
3. Is there any way to view tracing for a release build?

Thanks in advance for any help.

[hds]

1. Should I be able to build a release version while the tokio tracing feature is enabled, and the tokio_unstable flag is set?

This should work without any issue. If you have the tokio_unstable cfg flag set and the tracing feature enabled in tokio, the console-subscriber should be receiving the tracing based instrumentation it needs to make tokio-console function. Being in release mode won't change this, so I imagine that there is a difference in your cargo set up between debug and release.

2. Will my threads execute notably faster in a release build?

They will be faster, how much faster depends on a few factors and the sort of code that you're running. For example, serde is a lot slower in debug builds.

3. Is there any way to view tracing for a release build?

As mentioned above, it works the same as a debug build, so yes.

Aside from confirming your suspicion that it should just work, I haven't been able to help much here with what is actually causing the traces to not appear in your release build. If you can describe your tracing set up a bit more, I can try to take a few more guesses at what's going on.

[tthmic]

Thanks for the reply.

Confirming that it should work was more than enough. I honestly couldn't tell you for sure what the issue was, but since restructuring my workspace it's working.

Clearly a bit of a dumb issue/question to ask but I appreciate the help nonetheless!