Comment by akinomyoga

Thank you for your comment. I'm not sure for your specific case, but generally the performance largely depends on the terminal emulators in my experience. For example, xterm and Windows ConPTY are super slow which are sometimes 100 times slower than the fastest terminals. urxvt (rxvt-unicode), alacritty, terminology are usually fast. xfce4-terminal, qterminal, mintty are acceptable. VTE based terminals (GNOME terminal, lxterminal, etc.), termit, etc. are slow in my environments.