optimize startup time

routstr/proxy.py

@@ -80,31 +80,27 @@ def get_unique_models() -> list[Model]:
 
 async def refresh_model_maps() -> None:
     """Refresh global model and provider maps using the cost-based algorithm."""
+    from sqlalchemy.orm import selectinload
+
     global _model_instances, _provider_map, _unique_models
 
-    # Gather database overrides and disabled models
     async with create_session() as session:
-        result = await session.exec(select(ModelRow).where(ModelRow.enabled))
-        override_rows = result.all()
-
-        provider_result = await session.exec(select(UpstreamProviderRow))
-        providers_by_id = {p.id: p for p in provider_result.all()}
-
-        overrides_by_id: dict[str, tuple[ModelRow, float]] = {
-            row.id: (
-                row,
-                providers_by_id[row.upstream_provider_id].provider_fee
-                if row.upstream_provider_id in providers_by_id
-                else 1.01,
-            )
-            for row in override_rows
-            if row.upstream_provider_id is not None
-        }
-
-        disabled_result = await session.exec(
-            select(ModelRow.id).where(ModelRow.enabled == False)  # noqa: E712
+        # Fetch all providers with their models in a single logical operation
+        query = select(UpstreamProviderRow).options(
+            selectinload(UpstreamProviderRow.models)  # type: ignore
         )
-        disabled_model_ids = {row for row in disabled_result.all()}
+        result = await session.exec(query)
+        provider_rows = result.all()
+
+    overrides_by_id: dict[str, tuple[ModelRow, float]] = {}
+    disabled_model_ids: set[str] = set()
+
+    for provider in provider_rows:
+        for model in provider.models:
+            if model.enabled:
+                overrides_by_id[model.id] = (model, provider.provider_fee)
+            else:
+                disabled_model_ids.add(model.id)
 
     _model_instances, _provider_map, _unique_models = create_model_mappings(
         upstreams=_upstreams,

routstr/upstream/helpers.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import asyncio
 import os
 import re
 from typing import TYPE_CHECKING
@@ -7,6 +8,8 @@ from typing import TYPE_CHECKING
 if TYPE_CHECKING:
     from ..core.settings import Settings
 
+from sqlmodel import select
+
 from ..core import get_logger
 from ..core.db import AsyncSession, ModelRow, UpstreamProviderRow, create_session
 from ..payment.models import Model
@@ -176,8 +179,6 @@ async def init_upstreams() -> list[BaseUpstreamProvider]:
     Seeds database with providers from settings if empty, then loads and instantiates
     provider instances from database records, and refreshes their models cache.
     """
-    from sqlmodel import select
-
     from ..core.settings import settings
 
     async with create_session() as session:
@@ -193,16 +194,16 @@ async def init_upstreams() -> list[BaseUpstreamProvider]:
             result = await session.exec(select(UpstreamProviderRow))
             existing_providers = result.all()
 
-        upstreams: list[BaseUpstreamProvider] = []
-        for provider_row in existing_providers:
+        async def _init_single_provider(
+            provider_row: UpstreamProviderRow,
+        ) -> BaseUpstreamProvider | None:
             if not provider_row.enabled:
                 logger.debug(f"Skipping disabled provider: {provider_row.base_url}")
-                continue
+                return None
 
             provider = _instantiate_provider(provider_row)
             if provider:
                 await provider.refresh_models_cache()
-                upstreams.append(provider)
                 logger.debug(
                     f"Initialized {provider_row.provider_type} provider",
                     extra={
@@ -210,6 +211,12 @@ async def init_upstreams() -> list[BaseUpstreamProvider]:
                         "models_cached": len(provider.get_cached_models()),
                     },
                 )
+                return provider
+            return None
+
+        tasks = [_init_single_provider(row) for row in existing_providers]
+        results = await asyncio.gather(*tasks)
+        upstreams = [p for p in results if p is not None]
 
         return upstreams