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feat[next]: warn in case python is run without -O for non-embedded #2538

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feat[next]: warn in case python is run without -O for non-embedded #2538

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bde7b37
feat[next]: warn in case python is run without -O for non-embedded
havogt Mar 18, 2026
0ca516d
move to compile variant
havogt Mar 20, 2026
e98ddbf
add tests and fix stacklevels
havogt Mar 20, 2026
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10 changes: 10 additions & 0 deletions src/gt4py/next/ffront/decorator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -53,6 +53,12 @@

DEFAULT_BACKEND: next_backend.Backend | None = None

_PYTHON_OPTIMIZE_WARNING = (
"Python is not running in optimized mode, which may impact performance when using a"
" compiled backend. Consider running with `python -O` or setting the environment"
" variable `PYTHONOPTIMIZE=1`."
)


ProgramCallMetricsCollector = metrics.make_collector(
level=metrics.MINIMAL, metric_name=metrics.TOTAL_METRIC
Expand Down Expand Up @@ -391,6 +397,8 @@ def __call__(
)

if self.backend is not None:
if __debug__:
warnings.warn(_PYTHON_OPTIMIZE_WARNING, stacklevel=2)
self._compiled_programs(
*args, **kwargs, offset_provider=offset_provider, enable_jit=enable_jit
)
Expand Down Expand Up @@ -646,6 +654,8 @@ def __gt_closure_vars__(self) -> dict[str, Any]:
def __call__(self, *args: Any, enable_jit: bool | None = None, **kwargs: Any) -> Any:
if not next_embedded.context.within_valid_context() and self.backend is not None:
# non embedded execution
if __debug__:
warnings.warn(_PYTHON_OPTIMIZE_WARNING, stacklevel=2)
offset_provider = {**kwargs.pop("offset_provider", {})}
if "out" not in kwargs:
raise errors.MissingArgumentError(None, "out", True)
Expand Down
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