Sure, it's been done before, and I'm sure not just limited to SGI, but no one does this for regular apps these days - never heard of it before. I just find it neat that Codex came up with this - not something I ever would have.
Edit: I'm not saying no one does checksums to compare files (lol). I'm saying no one takes screenshots at specific timestamps within an app or game's lifecycle and then compares them to ensure they're identical.
Edit 2: Whoops, looks like I'm wrong and this is apparently a pretty common thing (but not at the startups I've worked at, /shrug). I still think it's cool that Codex is doing it without being told to, though.
Edit: I'm not saying no one does checksums to compare files (lol). I'm saying no one takes screenshots at specific timestamps within an app or game's lifecycle and then compares them to ensure they're identical.
Edit 2: Whoops, looks like I'm wrong and this is apparently a pretty common thing (but not at the startups I've worked at, /shrug). I still think it's cool that Codex is doing it without being told to, though.