[langarus]

on disk, so basically I'm trying to save the image of a solution and reuse it if the same quiz is required. So instead of recomputing the result just return the same image.

[ronbenton]

Got it. Is that cache surviving the crashes?

[langarus]

I'd have to host it somewhere (s3?). Right now I only commit the solution png to github. OFC it's not a good option but it's free and fast.

[slashyellow]

curious question from a non-programmer - are you checking against the exact same image (i.e. hashed), or is there an easy way of trying to match an image to a very similar one you've seen before?

[flexagoon]

Not OP, so I don't know what their website does, but there is a technique called "locality-sensitive hashing" that gives the same hash for similar items instead of exactly the same ones

https://en.wikipedia.org/wiki/Locality-sensitive_hashing