[Dherse]

Broadly this does the following:

• Move the constructor's rendering logic into a helper defined once per element, allowing reuse of the captured variables/context and therefore all of its hashing & cloning happening inside of typst. This makes the capture work once per instance to once per element declared.
• Also replaced a few large .with(...) calls with anonymous closures, allowing their captured environments to benefit from cached hashing while preserving their printed representations.

Performance

Codly’s many-small workload: 120 independent seven-line Rust blocks.

Metric	Before	After
Median compile time	4.004 s	2.373 s
Median peak RSS	241.9 MiB	232.5 MiB

This is a 40.7% reduction in compile time for this workload.

This should pass the entire CI suite, although I have only tested v0.15.1 so far so we need to see if the CI passes.

Disclaimer

Generative AI was used in the making of the original code: it found the optimization potential and I implemented part of the changes, with other parts being done directly by genAI.