Plack::Middleware::Debug::TrackObjects - Track Objects panel
enable "Debug"; enable "Debug::TrackObjects";
And when you load the application with plackup or other launcher:
# track everything plackup -MDevel::TrackObjects=/^/ myapp.psgi
You can specify the namespace with a regular expression. See Devel::TrackObjects for details.
This debug panel captures objects created in a request cycle by using Devel::TrackObjects. You can run your applications multiple times (i.e. refreshing the page) to see if the count of tracked objects increases, in which case there are leaked objects.