ADF BC Diagnostics
One of the old JHeadstart blog posts (of the orablogs site) that is still valid, is the one about ADF BC Diagnostics. It mentions jbo.debugoutput, jbo.logging.show.function, and jbo.logging.show.timing. It also explains how to interpret the timing.
See also the ADF Developer's Guide for Forms/4GL Developers, section 5.5.3.2 Enabling ADF Business Components Debug Diagnostics.