perf(selection): 优化选股执行性能

zhixing-server/tests/test_selection_http.py

@@ -3,9 +3,12 @@
 from datetime import date
 from decimal import Decimal
 
+import pytest
 from fastapi.testclient import TestClient
 
+import zhixing_server.modules.selection.presentation.http as selection_http
 from zhixing_server.bootstrap.app import create_app
+from zhixing_server.bootstrap.config import Settings
 from zhixing_server.modules.selection.application.run import PreparedSelectionRun
 from zhixing_server.modules.selection.domain.models import SelectionSignal, ZhixingB1Category
 from zhixing_server.modules.selection.domain.runs import (
@@ -19,7 +22,10 @@ from zhixing_server.modules.selection.domain.runs import (
 from zhixing_server.modules.selection.infrastructure.postgres_reader import (
     SelectionMarketDataNotReady,
 )
-from zhixing_server.modules.selection.presentation.http import get_selection_service
+from zhixing_server.modules.selection.presentation.http import (
+    get_selection_postgres_pool,
+    get_selection_service,
+)
 
 TARGET = date(2026, 8, 8)
 
@@ -128,6 +134,17 @@ def _client(service: FakeSelectionService) -> TestClient:
     return TestClient(app)
 
 
+def test_selection_dependency_reuses_one_bounded_pool(monkeypatch: pytest.MonkeyPatch) -> None:
+    monkeypatch.setattr(selection_http, "_SELECTION_POOL_CACHE", {})
+    settings = Settings(database_url="postgresql://test", selection_max_workers=4)
+
+    first = get_selection_postgres_pool(settings)
+    second = get_selection_postgres_pool(settings)
+
+    assert first is second
+    assert first.max_connections == 6
+
+
 def test_trigger_returns_accepted_run_and_schedules_execution() -> None:
     service = FakeSelectionService()