When writing my own font library I found CJK a bit harder but not impossible. Reading all CJK letters and rasterizing them takes like a GB of memory and many se

When writing my own font library I found CJK a bit harder but not impossible. Reading all CJK letters and rasterizing them takes like a GB of memory and many seconds. So what I do is don't parse the font file fully, but store the location where litters live memory and only parse and render them when they are needed. Most CJK letters are never needed. I don't have good support Arabic and Hebrew, they feel harder.