[beachstartup]

amplified log playback works best in my experience.

of course, this requires at least some public traffic to play back. i've only used proprietary tools for this in my personal experience, but i believe jmeter has this functionality (log sampling).

[pc86]

This seems really interesting. When you say proprietary tools, I assume you mean more custom-built solutions and less paid tools available to anyone?

[beachstartup]

yeah, tools built in-house to test specific apps, not commercial apps