You won’t find many people who consider this “valid” criticism. This is a pet project for educational purposes and you’re complaining because they’re not equivalently efficient on every platform.
`Meh. Just because "it's out of scope of what I planned" doesn't mean that with a few critiques/pointers along the way that it couldn't be better.
I understand the "let's do this for the lulz and see what happens/learns/etc", but once you feel like it is "good enough" that you post it to the public (for let's face it, publicity/showing off/self-promotion), you HAVE to expect that some people might think it isn't good enough and here's some ideas to make it better.
That's not to say that what was posted is shite. It's just with a bit more...it could be even more.