Code generation

PyBaMM evaluates CasADi expressions through one of two backends:

• compile=False (default) – CasADi’s in-process virtual machine.

• compile=True – pybamm.codegen.compilation.aot_compile() emits C source for a CasADi Function, compiles it to a shared library and returns a casadi.external wrapper. Results are cached in-process and on disk, keyed by a hash of the serialised function.

The backend is selected via the compile option on a solver, e.g. pybamm.IDAKLUSolver(options={"compile": True}). The setting is forwarded to pybamm.Solution so post-solve variable observation uses the same backend as the integration.

• AOT compilation
  • aot_compile()
  • Environment variables