What you are describing sounds like the onefile mode. Pyinstaller also has a onedir mode which is much faster to start. I packaged some python ml models into

What you are describing sounds like the onefile mode. Pyinstaller also has a onedir mode which is much faster to start. I packaged some python ml models into a pyinstaller built exe and a larger java application calls them. Onedir makes for a big install but they only take a second or two to run.