| .. _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. | |