Small improvement in get_string()

[guidoreina]

In the function get_string() there are two variables: capacity and size. It looks like the idea behind them is not to realloc() for every single character read, but in the while loop capacity is always incremented by 1 instead of by a bigger number or capacity * 2. This leads to realloc() being always called in each iteration, is this intentional?

[dmalan]

Indeed, we used to grow the buffer exponentially, but that felt like overkill, given the library's intended use case (human I/O), so we simplified to just growing by 1 on each iteration, the overhead of which is negligible for the use case. So, good instincts, but conscious choice ultimately!

[guidoreina]

Thank you for your quick answer. You are right, for human input the buffer won't grow that much anyway. Thank you also for the CS50 videos, they are just great.