添加缓存预热

backend/main.py

@@ -1,5 +1,4 @@
-import asyncio
-from contextlib import asynccontextmanager, suppress
+from contextlib import asynccontextmanager
 import os
 import time
 from multiprocessing import freeze_support
@@ -8,34 +7,16 @@ import uvicorn
 from fastapi import FastAPI
 
 from api.core import Exceptions, Gzip, Middleware
-from api.core.RedisPreheat import preheat_redis_cache
 from api.main import api_router
 from config.main import config
 
 
-async def _run_redis_preheat_background():
-    print('Redis 缓存预热中(后台)...')
-    start = time.perf_counter()
-    try:
-        warmed_keys = await asyncio.to_thread(preheat_redis_cache)
-        duration = time.perf_counter() - start
-        print(f'Redis 缓存预热完成: {len(warmed_keys)} keys, {duration:.2f}s')
-    except Exception as exc:
-        print(f'Redis 缓存预热失败: {exc}')
-
-
 @asynccontextmanager
-async def lifespan(app: FastAPI):
+async def lifespan(_: FastAPI):
     print('dcalc is starting...')
     print('Application starting...')
-    app.state.redis_preheat_task = asyncio.create_task(_run_redis_preheat_background())
     print('Application startup complete.')
     yield
-    preheat_task = getattr(app.state, 'redis_preheat_task', None)
-    if preheat_task and not preheat_task.done():
-        preheat_task.cancel()
-        with suppress(asyncio.CancelledError):
-            await preheat_task
 
 
 application = FastAPI(docs_url='/doc', redoc_url=None, lifespan=lifespan)