[dthakur]

From my perspective, I see a project that took years of prep. Multiple papers were written. It was tested on software sim, and NASA's physical space simulator[1]. And it finally _successfully_ flew on mars, with some minor bugs.

In my opinion assuming they were "testing in production" (production being mars!), or writing code that "definitely not have passed code review", or that they did not do couple of hours of flight testing on earth, is an unnecessarily unkind assessment of this project.

[1] Helicopter Models and Test Facilities: https://rotorcraft.arc.nasa.gov/Publications/files/Balaram_A...

[jacobolus]

I had a friend who quit their JPL software job (to go work for a large, bureaucratic software firm) because JPL required such an extensive testing and review regimen before every change that the work got boring for being too slow.

I am very skeptical of the claim that this code was not tested before launch.