While total workflow execution time is helpful, it would be nice if n8n could display, for each execution, the time it took to process each node. For example, I have no idea how long it takes to generate a hash. I also cannot evaluate the performance of data sources such as Airtable, Google Sheets, or MySQL.
If I can see that a call to remote data source is adding seconds to a workflow, I might look for alternatives. I am currently left to guess regarding the reasons for longer execution times.