Performance problem on realtime battle

Performance depends on what's going on alltogether. E.g. the number of enemies, what's happening in their battle events, etc.

Are you using the latest ORK version?

The HUDs will only rebuild if there was a change, e.g. if the combatant took damage. While this naturally has an influence on performance, it's not really that high, as ORK is pooling and reusing the UI objects.
Unless there is a constant change, these HUD rebuilds are limited, single events without much impact.

Outputting the node names in the console would only be possible if you add that in the ORK code - and just printing them there will already impact your performance heavily, making it hard to identify the correct node. The profiler screenshot you posted shows that Enable Component nodes are responsible for some of the performance drawback.

You have to keep in mind that the profiler will also impact the performance - especially using deep profile more than doubles the ms recorded.

ORK code refers to the gameplay source code provided with the full version of ORK in the separate zip file. You'd have to output the name of the next node that will be called in the battle event's code.

For battle events, the class is named BattleEvent and can be found at Gameplay/Events/ in the source code project. The ExecuteNextStep function is where you'd need to put the debug output.