UTF-8, which we mainly use and is an international standard, is a variable length method of 1~4 bytes. (Maximum 4 bytes) But in fact, 3 bytes is enough to express all the characters of Unicode. While ...

Might be spending too much on start/end columns (40k 2-byte VLQs). We can save 88kb omitting the start/end lines. Lots of byte spent on encoding the definition's scope index (8k 3-bytes, 36k 4-bytes).