This tool is very similar to what I had created last summer as an intern (strace/lsof analysis), but it seems to be a lot more rich in features. I analyzed system calls as well as application tracing (New Relic) to find/fix performance bottlenecks.
is the strace analysis stuff open source? have been messing around with creating something reusable in my spare time, based on hacky methods I've long been using. would be interested to see.
