Found some more performance optimizations.
Use dupablePerformIO where relevant, & it doesn't incur excessive allocation.
Ensure amounts of output are dereferenced as quickly as large amounts are.
Expose exception & update metadata.
Implement more typeclasses & ensure empty input don't throw errors.
Expose HarfBuzz 3.3 APIs, attempt 2.
Documentation-compilation fixes, release v1!
Document shaping & version-number APIs!
Fix segfaults & include test assets (major refactor).
Fix segfault upon too much HarfBuzz concurrency.
Fix reentrancy complaints from GHC, attempt to fix segfault.
Add documentation & corrected type signatures.
Add, test, & fix shaping function.
Draft pure-functional Harfbuzz API.