Has any one doing performance testing the iterative development in a very large development company? If so, please share your experience. I am in the process of improving our performance testing process as we have recent adopted Agile.
If your project uses the Continuous Integration approach I would strongly recommend running a minor performance test as part of the build. Perhaps some really simple transactions which will not have too much of a negative impact on the build time. Or alternatively you could schedule the performance test to run as part of CI once a day (probably overnight) rather than after every repository check in.
Performance trends can be shared on some sort of project Wiki or better still plastered all over the project walls. Developers love to see visual feedback, particularly if it is positive!