优化仿真求解性能并修复流量闭合问题（初版）

app/simulation/benchmark_performance.py

@@ -58,21 +58,6 @@ def _load_factory_xml(specification: str) -> bytes:
     return build_reactflow_system_xml(value)
 
 
-def _clear_property_caches() -> None:
-    from app.simulation.components.amesim.media.mediums import (
-        AmesimHeliumPengRobinsonMedium,
-    )
-
-    for method_name in (
-        "temperature_from_pressure_enthalpy",
-        "properties_from_mU",
-    ):
-        method = getattr(AmesimHeliumPengRobinsonMedium, method_name)
-        cache_clear = getattr(method, "cache_clear", None)
-        if cache_clear is not None:
-            cache_clear()
-
-
 def _serialize_result_event(result: dict[str, object]) -> bytes:
     """Render the final NDJSON payload shape used by the streaming endpoint."""
 
@@ -98,15 +83,12 @@ def _run_case(
     warmups: int,
     runs: int,
     cancellable_path: bool,
-    clear_property_cache: bool,
     allow_failures: bool,
 ) -> dict[str, object]:
     from app.main import run_system_xml_simulation
 
     cancel_check = (lambda: False) if cancellable_path else None
     for _ in range(warmups):
-        if clear_property_cache:
-            _clear_property_caches()
         result = run_system_xml_simulation(xml_bytes, cancel_check=cancel_check)
         if not bool(result.get("success")) and not allow_failures:
             raise RuntimeError(f"Warmup for {name!r} failed: {result.get('message')}")
@@ -118,8 +100,6 @@ def _run_case(
     profiles: list[dict[str, object]] = []
     final_result: dict[str, object] | None = None
     for _ in range(runs):
-        if clear_property_cache:
-            _clear_property_caches()
         wall_start = perf_counter_ns()
         cpu_start = process_time_ns()
         result = run_system_xml_simulation(xml_bytes, cancel_check=cancel_check)
@@ -190,9 +170,9 @@ def _parse_arguments(argv: list[str] | None = None) -> argparse.Namespace:
         help="Do not pass a cancel callback; use the one-shot SciPy path when eligible.",
     )
     parser.add_argument(
-        "--cold-property-cache",
+        "--disable-property-cache",
         action="store_true",
-        help="Clear the two helium property LRU caches before every warmup and measured run.",
+        help="Disable the run-local exact property cache for an A/B comparison.",
     )
     parser.add_argument(
         "--allow-failures",
@@ -213,6 +193,9 @@ def _parse_arguments(argv: list[str] | None = None) -> argparse.Namespace:
 def main(argv: list[str] | None = None) -> int:
     arguments = _parse_arguments(argv)
     os.environ["SIMULATIONAPP_PROFILE"] = arguments.mode
+    os.environ["SIMULATIONAPP_PROPERTY_CACHE"] = (
+        "off" if arguments.disable_property_cache else "on"
+    )
 
     cases: list[tuple[str, bytes]] = []
     for raw_case in arguments.xml:
@@ -226,7 +209,7 @@ def main(argv: list[str] | None = None) -> int:
         "generatedAt": datetime.now(UTC).isoformat(),
         "profileMode": arguments.mode,
         "cancellableSolverPath": not arguments.direct_path,
-        "coldPropertyCache": bool(arguments.cold_property_cache),
+        "propertyCacheEnabled": not arguments.disable_property_cache,
         "allowFailures": bool(arguments.allow_failures),
         "warmups": arguments.warmups,
         "runs": arguments.runs,
@@ -242,7 +225,6 @@ def main(argv: list[str] | None = None) -> int:
                 warmups=arguments.warmups,
                 runs=arguments.runs,
                 cancellable_path=not arguments.direct_path,
-                clear_property_cache=arguments.cold_property_cache,
                 allow_failures=arguments.allow_failures,
             )
             for name, xml_bytes in cases