Zoom slows down the IME, so change the priority of the IME and Zoom process.

renice-apps.sh

#!/usr/bin/env bash
set -euo pipefail

readonly apps=(
  "GoogleJapaneseInput.app:-10"
  "zoom.us.app:10"
)

sudo echo -n

for app in "${apps[@]}"
do
  app_name=$(echo "${app}" | cut -d : -f 1)
  app_nice=$(echo "${app}" | cut -d : -f 2)

  echo "#"
  echo "# ${app_name}"
  echo "#"

  pids=($(pgrep -f "${app_name}"))

  echo
  echo "# before"
  ps -p "${pids[*]}" -o pid,nice,command

  echo
  echo "# change nice"
  echo "Change the nice value of the processes to ${app_nice}"
  sudo renice ${app_nice} "${pids[@]}"

  echo
  echo "# after"
  ps -p "${pids[*]}" -o pid,nice,command

  echo
done