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Tools we use in the making of Folk

''rr'' [[https://github.com/rr-debugger/rr|rr debugger on GitHub]]

rr is a time travel debugger that runs native programs with only about a 10% overhead
it uses GDB for its interface
It's kinda amazing to do watch -l someObj->refCount, use rc to run backwards, and find exactly where the refCount was last set
Rob Fielding uses it as he's been weeding out bugs in jimtcl