I am writing two books. One is on Rust programming and another is on
geometry, so I have syntax highlighted code and in second has lost of
diagrams.

Perhaps Aditya Mahajan can tell me how can I cache code snippets. Invoking
VIM will have heavy penalty on highlighting the code otherwise.

Other than that, how can I cache Metafun images so that they are not
recomputed on every processing of file.

-- 
Respect,
Shiv Shankar Dayal