Poor performance when synchronizing order status, order id, and product ID fields on complex content types

I have a large, complex content type with around 80 fields, several of which are address, location, or multivalue CCK fields. I also have a number of rules and ubercart conditional actions that execute custom code on node save or order save. I was getting 30 to 40 second page load times when viewing the Edit and Payment tabs on the order.

I enabled the devel performance logging module and turned on query logging. On the payment tab, there were very few individual long queries, nearly all of which were under 30ms. However, there were a large number of 20ms updates that were executed numerous times (123 times per set of location field updates, 41 times per set of content type table updates, and both of these appeared 4 or 5 times with minor differences, but the same number of executions and approximately the same execution times - I did not analyze the differences).

Sadly, I cannot provide a copy of the query log for analysis.

In the node checkout settings for the content type, I disabled the Order status field, Order ID field, and Product ID field settings, and page load times returned to the 2 to 3 second range.

I have rules and conditional actions setting values in these fields at appropriate times, so the problem is resolved for me, but I figured someone else might benefit from the information, even if this is a "won't fix" issue.