On Sun, Feb 11, 2018 at 10:00 AM, Merlin Moncure <mmonc...@gmail.com> wrote: > I tested several queries in my application that had >30 second compile > times against a one second run time,. Not being able to manage when > compilation happens is making it difficult to get a sense of llvm > performance in the general case.
In theory, the GUCs Andres has added to only compile if the estimated total cost is above some threshold is supposed to help with this. But if the compile time and the cost don't correlate, then we've got trouble. How did you manage to create an expression that took 30 seconds to compile? It doesn't take that long to compile a 5000-line C file. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
