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- .. _compilation-units:
- Compilation units
- =================
- When you run mypyc to compile a set of modules, these modules form a
- *compilation unit*. Mypyc will use early binding for references within
- the compilation unit.
- If you run mypyc multiple times to compile multiple sets of modules,
- each invocation will result in a new compilation unit. References
- between separate compilation units will fall back to late binding,
- i.e. looking up names using Python namespace dictionaries. Also, all
- calls will use the slower Python calling convention, where arguments
- and the return value will be boxed (and potentially unboxed again in
- the called function).
- For maximal performance, minimize interactions across compilation
- units. The simplest way to achieve this is to compile your entire
- program as a single compilation unit.
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