FWIW, the current version of the code (i.e. with the buffered reader), on my machine at least, runs identically fast with and without the tmp file. Here's a po

FWIW, the current version of the code (i.e. with the buffered reader), on my machine at least, runs identically fast with and without the tmp file. Here's a possibly more detailed reason as to why https://news.ycombinator.com/item?id=39764287#39768022 https://news.ycombinator.com/item?id=39764287#39768022.