Using md5 for this seems like an odd choice.

Sha1 is a better choice even for non-cryptographic use cases, it's quite a bit faster than md5. Even better would be something like xxhash!

According to a quick bash script I wrote to benchmark the popular hash functions, md5 comes out last compared to sha1, sha256, sha512, and blake2, and by a decent margin!

A good rule of thumb is to never use md5 at all. Not even for non-cryptographic use cases. It's not only broken, but also very slow!