There is a way how to improve efficiency of written or typed texts. It is possible to choose 500 most frequently used words in a language and create simple characters for them. In this way each word consisting of several letters will be represented by a single character Characters must be very simple, should be much more simple then for instance chinese characters. Simple characters can be easily remembered and quickly written.
If you use characters instead of letters, you will be able to write sentences much faster as you don't need to write each letter but only writing one character, the text will occupy less space because the length of words will be shorter. Other words for which no characters were created can be written in a traditional way by using letters.