python string concatination speed
I made a quick python script to convert OpenLP song (lyric) databases into the presentation format used by ProPresenter.
https://github.com/danthedeckie/OpenLP-To-ProPresenter5-Converter
is the link. I put it together in a few hours, it should have been quicker, but I’m still re-acquainting myself with python.
It is a nice language.
One thing I did today, while cleaning up a bit, was wonder about something I remember from doing python years ago - string concatenation. Joining two strings (texts) together.
"Hello" + "World" -> "HelloWorld"
I remembered something about it being slow, and python recommending using
''.join(("Hello", "World"))
which seems to me one of the most blatently ugly obscure gotchas I’ve come across in a long while.
Anyway, I refactored my code into that style - converting databases and song lyrics and writing XML stuff is pretty much all Text formatting and concatination.
It made no discernable difference. So I went back to normal easier to read x += y, and x = y + z type of code.