4 ms·
Shock Result? Rust faster than Python in a single test of file parsing
- thiasdflkj 6y agowhy the `fp.readline()` and `while line:` business? I don't have a big file handy to benchmark but that pattern moves the file reading into python bytecode. The canonical way to read a file line by line while counting the lines is to loop over the file (it's automatically a line iterator) and use enumerate. here is the disassembed bytecode of the respective versions https://pastebin.com/Rd4g8cE2 https://pastebin.com/Rd4g8cE2 that being said, Rust will still outrun Python overall.
- jonquark 6y agoThe file reading isn't the slow part - removing the regular expression and file is read in fractions of a second rather than minutes (as the last python example shows).