perf: retain exact flow caches and compiled targets

app/simulation/solvers/algebraic_blocks.py

@@ -779,14 +779,7 @@ class StreamPressureBlockSolver:
                 unknown.write(0.0)
             for stage in self._selected_explicit_flow_plan:
                 values = solver._evaluate_explicit_flow_stage(stage)
-                targets = tuple(
-                    (
-                        assignment,
-                        assignment.unknown.read() - value,
-                    )
-                    for assignment, value in zip(stage.assignments, values)
-                )
-                for assignment, target_value in targets:
+                for assignment, target_value in zip(stage.assignments, values):
                     if isfinite(target_value):
                         assignment.unknown.write(target_value)
                         seeded_equation_ids.add(assignment.equation_id)