https://pernos.co https://pernos.co does something similar, except that instead of searching for watchpoints/breakpoints we're building a database of everything

https://pernos.co https://pernos.co does something similar, except that instead of searching for watchpoints/breakpoints we're building a database of everything that happened. That involves replaying different segments of the execution in parallel and also applying different kinds of instrumentation to the same segments, also run in parallel. It's great, we can saturate the biggest boxes AWS has :-).