[polyml] Performance problems with saving and loading state

We have performance problems with ProofPower when compiled with Poly/ML using the latest sources as compared with version 5.2.1. The main problem is with loading a large state. In some of QinetiQ's tests, it now takes nearly 40 minutes to load a state (occupying about 150Mb on disc) that previously took about 20 seconds.

Unfortunately, my attempts to create simple examples of this type problem do not exhibit much difference between 5.2.1 and the latest sources. I wondered if anyone else has had similar problems or has any suggestions about how to isolate the problem.

I believe the problem is quite old. It apparently predates the move from CVS to SVN.

Regards,

Rob.