The text discusses the advantages of using local glyphs for CJK (Chinese, Japanese, Korean) text in maps instead of relying on embedded fonts, which can result in significant performance improvements due to the large file sizes of CJK glyphs. By defaulting to local fonts available on users' devices, the need for remotely loading fonts is bypassed, enhancing the efficiency of map rendering. Additionally, it notes the option to display CJK text vertically along the path of road or line labels, providing an option for more versatile text presentation in map design.