Thanks for taking a look. For a standalone "application", 100msec for sure doesn't matter. However, if (1) I'm calling several perl scripts inside bashrc, or (2) a script is invoked after every command (PROMPT_COMMAND in bash) or (3) a script runs in an editor on every keystroke (see the vim-like editor Kakoune), those 100msec add up. 10 scripts taking 100msec each result in a 1sec delay before being able to type anything, which is of course unacceptable.