TL;DR of the article, generated automatically.

A JIT compiler turns text strings into fast code for bitmap fonts.

• Speed: the text demo uses about 2.6% of one RP2350 core.
• Cost: the JIT output is about 10x the string size, and builds in under 100µs.
• Kerning: each glyph has bit vectors, and their dot product gives the pixels to kern.