feat(perf): add TTFB and output rate tracking (#421)

- Add ttfb_ms field to message_request table for Time To First Byte tracking
- Record TTFB at first chunk arrival (streaming) or use durationMs fallback (non-streaming)
- Add performance section to ErrorDetailsDialog showing TTFB, duration, and output rate
- Update provider leaderboard: replace avgResponseTime with avgTtfbMs and avgTokensPerSecond
- Add i18n support for all 5 locales (en, zh-CN, zh-TW, ja, ru)

Implementation details:
- ProxySession.recordTtfb() method with idempotent design
- Gemini passthrough records TTFB at response received time
- Output rate calculated as outputTokens / ((durationMs - ttfbMs) / 1000)
- Display "-" for null/zero values instead of misleading "0"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

drizzle/0040_bored_venus.sql

@@ -0,0 +1 @@
+ALTER TABLE "message_request" ADD COLUMN "ttfb_ms" integer;

drizzle/meta/0040_snapshot.json

@@ -0,0 +1,1951 @@
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+              "isExpression": false,
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+          "concurrently": false,
+          "method": "btree",
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+        },
+        "idx_message_request_endpoint": {
+          "name": "idx_message_request_endpoint",
+          "columns": [
+            {
+              "expression": "endpoint",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
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+          "where": "\"message_request\".\"deleted_at\" IS NULL",
+          "concurrently": false,
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+        },
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+              "expression": "created_at",
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+              "expression": "deleted_at",
+              "isExpression": false,
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+          "method": "btree",
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+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.model_prices": {
+      "name": "model_prices",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
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+          "type": "varchar",
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+          "notNull": true
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+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
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+        "cleanup_batch_size": {
+          "name": "cleanup_batch_size",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 10000
+        },
+        "enable_client_version_check": {
+          "name": "enable_client_version_check",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "verbose_provider_error": {
+          "name": "verbose_provider_error",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "enable_http2": {
+          "name": "enable_http2",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": false
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        }
+      },
+      "indexes": {},
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    },
+    "public.users": {
+      "name": "users",
+      "schema": "",
+      "columns": {
+        "id": {
+          "name": "id",
+          "type": "serial",
+          "primaryKey": true,
+          "notNull": true
+        },
+        "name": {
+          "name": "name",
+          "type": "varchar",
+          "primaryKey": false,
+          "notNull": true
+        },
+        "description": {
+          "name": "description",
+          "type": "text",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "role": {
+          "name": "role",
+          "type": "varchar",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'user'"
+        },
+        "rpm_limit": {
+          "name": "rpm_limit",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false,
+          "default": 60
+        },
+        "daily_limit_usd": {
+          "name": "daily_limit_usd",
+          "type": "numeric(10, 2)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'100.00'"
+        },
+        "provider_group": {
+          "name": "provider_group",
+          "type": "varchar(50)",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'default'"
+        },
+        "tags": {
+          "name": "tags",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[]'::jsonb"
+        },
+        "limit_5h_usd": {
+          "name": "limit_5h_usd",
+          "type": "numeric(10, 2)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "limit_weekly_usd": {
+          "name": "limit_weekly_usd",
+          "type": "numeric(10, 2)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "limit_monthly_usd": {
+          "name": "limit_monthly_usd",
+          "type": "numeric(10, 2)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "limit_total_usd": {
+          "name": "limit_total_usd",
+          "type": "numeric(10, 2)",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "limit_concurrent_sessions": {
+          "name": "limit_concurrent_sessions",
+          "type": "integer",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "daily_reset_mode": {
+          "name": "daily_reset_mode",
+          "type": "daily_reset_mode",
+          "typeSchema": "public",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'fixed'"
+        },
+        "daily_reset_time": {
+          "name": "daily_reset_time",
+          "type": "varchar(5)",
+          "primaryKey": false,
+          "notNull": true,
+          "default": "'00:00'"
+        },
+        "is_enabled": {
+          "name": "is_enabled",
+          "type": "boolean",
+          "primaryKey": false,
+          "notNull": true,
+          "default": true
+        },
+        "expires_at": {
+          "name": "expires_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        },
+        "allowed_clients": {
+          "name": "allowed_clients",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[]'::jsonb"
+        },
+        "allowed_models": {
+          "name": "allowed_models",
+          "type": "jsonb",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "'[]'::jsonb"
+        },
+        "created_at": {
+          "name": "created_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "updated_at": {
+          "name": "updated_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false,
+          "default": "now()"
+        },
+        "deleted_at": {
+          "name": "deleted_at",
+          "type": "timestamp with time zone",
+          "primaryKey": false,
+          "notNull": false
+        }
+      },
+      "indexes": {
+        "idx_users_active_role_sort": {
+          "name": "idx_users_active_role_sort",
+          "columns": [
+            {
+              "expression": "deleted_at",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "role",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "id",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "where": "\"users\".\"deleted_at\" IS NULL",
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_users_enabled_expires_at": {
+          "name": "idx_users_enabled_expires_at",
+          "columns": [
+            {
+              "expression": "is_enabled",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            },
+            {
+              "expression": "expires_at",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "where": "\"users\".\"deleted_at\" IS NULL",
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_users_created_at": {
+          "name": "idx_users_created_at",
+          "columns": [
+            {
+              "expression": "created_at",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        },
+        "idx_users_deleted_at": {
+          "name": "idx_users_deleted_at",
+          "columns": [
+            {
+              "expression": "deleted_at",
+              "isExpression": false,
+              "asc": true,
+              "nulls": "last"
+            }
+          ],
+          "isUnique": false,
+          "concurrently": false,
+          "method": "btree",
+          "with": {}
+        }
+      },
+      "foreignKeys": {},
+      "compositePrimaryKeys": {},
+      "uniqueConstraints": {},
+      "policies": {},
+      "checkConstraints": {},
+      "isRLSEnabled": false
+    }
+  },
+  "enums": {
+    "public.daily_reset_mode": {
+      "name": "daily_reset_mode",
+      "schema": "public",
+      "values": [
+        "fixed",
+        "rolling"
+      ]
+    }
+  },
+  "schemas": {},
+  "sequences": {},
+  "roles": {},
+  "policies": {},
+  "views": {},
+  "_meta": {
+    "columns": {},
+    "schemas": {},
+    "tables": {}
+  }
+}

drizzle/meta/_journal.json

@@ -281,6 +281,13 @@
       "when": 1766461982056,
       "tag": "0039_abnormal_marvel_apes",
       "breakpoints": true
+    },
+    {
+      "idx": 40,
+      "version": "7",
+      "when": 1766509746306,
+      "tag": "0040_bored_venus",
+      "breakpoints": true
     }
   ]
 }

messages/en/dashboard.json

@@ -194,6 +194,12 @@
       },
       "billingDetails": {
         "title": "Billing Details"
+      },
+      "performance": {
+        "title": "Performance",
+        "ttfb": "TTFB",
+        "duration": "Total Duration",
+        "outputRate": "Output Rate"
       }
     },
     "providerChain": {
@@ -274,7 +280,9 @@
       "cacheCreationConsumedAmount": "Cache Creation Spend",
       "totalConsumedAmount": "Total Spend",
       "successRate": "Success Rate",
-      "avgResponseTime": "Avg Response Time"
+      "avgResponseTime": "Avg Response Time",
+      "avgTtfbMs": "Avg TTFB",
+      "avgTokensPerSecond": "Avg tok/s"
     },
     "states": {
       "loading": "Loading...",

messages/ja/dashboard.json

@@ -193,6 +193,12 @@
       },
       "billingDetails": {
         "title": "課金詳細"
+      },
+      "performance": {
+        "title": "パフォーマンス",
+        "ttfb": "TTFB",
+        "duration": "総所要時間",
+        "outputRate": "出力速度"
       }
     },
     "providerChain": {
@@ -273,7 +279,9 @@
       "cacheCreationConsumedAmount": "キャッシュ作成消費額",
       "totalConsumedAmount": "総消費額",
       "successRate": "成功率",
-      "avgResponseTime": "平均応答時間"
+      "avgResponseTime": "平均応答時間",
+      "avgTtfbMs": "平均TTFB",
+      "avgTokensPerSecond": "平均トークン/秒"
     },
     "states": {
       "loading": "読み込み中...",

messages/ru/dashboard.json

@@ -193,6 +193,12 @@
       },
       "billingDetails": {
         "title": "Детали биллинга"
+      },
+      "performance": {
+        "title": "Производительность",
+        "ttfb": "TTFB",
+        "duration": "Общее время",
+        "outputRate": "Скорость вывода"
       }
     },
     "providerChain": {
@@ -273,7 +279,9 @@
       "cacheCreationConsumedAmount": "Расход на создание кэша",
       "totalConsumedAmount": "Общие расходы",
       "successRate": "Процент успеха",
-      "avgResponseTime": "Среднее время ответа"
+      "avgResponseTime": "Среднее время ответа",
+      "avgTtfbMs": "Средний TTFB",
+      "avgTokensPerSecond": "Средн. ток/с"
     },
     "states": {
       "loading": "Загрузка...",

messages/zh-CN/dashboard.json

@@ -194,6 +194,12 @@
       },
       "billingDetails": {
         "title": "计费详情"
+      },
+      "performance": {
+        "title": "性能数据",
+        "ttfb": "首字节时间（TTFB）",
+        "duration": "总耗时",
+        "outputRate": "输出速率"
       }
     },
     "providerChain": {
@@ -274,7 +280,9 @@
     "cacheCreationConsumedAmount": "缓存创建消耗金额",
     "totalConsumedAmount": "总消耗金额",
     "successRate": "成功率",
-    "avgResponseTime": "平均响应时间"
+    "avgResponseTime": "平均响应时间",
+    "avgTtfbMs": "平均 TTFB",
+    "avgTokensPerSecond": "平均输出速率"
   },
     "states": {
       "loading": "加载中...",

messages/zh-TW/dashboard.json

@@ -194,6 +194,12 @@
       },
       "billingDetails": {
         "title": "計費詳情"
+      },
+      "performance": {
+        "title": "效能資料",
+        "ttfb": "首字節時間（TTFB）",
+        "duration": "總耗時",
+        "outputRate": "輸出速率"
       }
     },
     "providerChain": {
@@ -274,7 +280,9 @@
       "cacheCreationConsumedAmount": "快取建立消耗金額",
       "totalConsumedAmount": "總消耗金額",
       "successRate": "成功率",
-      "avgResponseTime": "平均回覆時間"
+      "avgResponseTime": "平均回覆時間",
+      "avgTtfbMs": "平均 TTFB",
+      "avgTokensPerSecond": "平均輸出速率"
     },
     "states": {
       "loading": "載入中...",

src/app/[locale]/dashboard/leaderboard/_components/leaderboard-view.tsx

@@ -131,7 +131,7 @@ export function LeaderboardView({ isAdmin }: LeaderboardViewProps) {
     scope === "user"
       ? 5
       : scope === "provider"
-        ? 7
+        ? 8
         : scope === "providerCacheHitRate"
           ? 8
           : scope === "model"
@@ -200,10 +200,20 @@ export function LeaderboardView({ isAdmin }: LeaderboardViewProps) {
       cell: (row) => `${(Number((row as ProviderEntry).successRate || 0) * 100).toFixed(1)}%`,
     },
     {
-      header: t("columns.avgResponseTime"),
+      header: t("columns.avgTtfbMs"),
       className: "text-right",
-      cell: (row) =>
-        `${Math.round((row as ProviderEntry).avgResponseTime || 0).toLocaleString()} ms`,
+      cell: (row) => {
+        const val = (row as ProviderEntry).avgTtfbMs;
+        return val && val > 0 ? `${Math.round(val).toLocaleString()} ms` : "-";
+      },
+    },
+    {
+      header: t("columns.avgTokensPerSecond"),
+      className: "text-right",
+      cell: (row) => {
+        const val = (row as ProviderEntry).avgTokensPerSecond;
+        return val && val > 0 ? `${val.toFixed(1)} tok/s` : "-";
+      },
     },
   ];
 

src/app/[locale]/dashboard/logs/_components/error-details-dialog.tsx

@@ -6,6 +6,7 @@ import {
   CheckCircle,
   DollarSign,
   ExternalLink,
+  Gauge,
   Loader2,
   Monitor,
 } from "lucide-react";
@@ -53,6 +54,8 @@ interface ErrorDetailsDialogProps {
   costUsd?: string | null;
   costMultiplier?: string | null;
   context1mApplied?: boolean | null; // 1M上下文窗口是否已应用
+  durationMs?: number | null;
+  ttfbMs?: number | null;
   externalOpen?: boolean; // 外部控制弹窗开关
   onExternalOpenChange?: (open: boolean) => void; // 外部控制回调
   scrollToRedirect?: boolean; // 是否滚动到重定向部分
@@ -81,6 +84,8 @@ export function ErrorDetailsDialog({
   costUsd,
   costMultiplier,
   context1mApplied,
+  durationMs,
+  ttfbMs,
   externalOpen,
   onExternalOpenChange,
   scrollToRedirect,
@@ -106,6 +111,24 @@ export function ErrorDetailsDialog({
   const isInProgress = !statusCode; // 没有状态码表示请求进行中
   const isBlocked = !!blockedBy; // 是否被拦截
 
+  const outputTokensPerSecond = (() => {
+    if (
+      outputTokens === null ||
+      outputTokens === undefined ||
+      outputTokens <= 0 ||
+      durationMs === null ||
+      durationMs === undefined ||
+      ttfbMs === null ||
+      ttfbMs === undefined ||
+      ttfbMs >= durationMs
+    ) {
+      return null;
+    }
+    const seconds = (durationMs - ttfbMs) / 1000;
+    if (seconds <= 0) return null;
+    return outputTokens / seconds;
+  })();
+
   // 解析 blockedReason JSON
   let parsedBlockedReason: { word?: string; matchType?: string; matchedText?: string } | null =
     null;
@@ -464,6 +487,46 @@ export function ErrorDetailsDialog({
             </div>
           )}
 
+          {/* 性能数据 */}
+          {(durationMs != null || ttfbMs != null || (outputTokens ?? 0) > 0) && (
+            <div className="space-y-2">
+              <h4 className="font-semibold text-sm flex items-center gap-2">
+                <Gauge className="h-4 w-4 text-purple-600" />
+                {t("logs.details.performance.title")}
+              </h4>
+              <div className="rounded-md border bg-muted/50 p-4">
+                <div className="grid grid-cols-2 gap-x-6 gap-y-2 text-sm">
+                  <div className="flex justify-between">
+                    <span className="text-muted-foreground">
+                      {t("logs.details.performance.ttfb")}:
+                    </span>
+                    <span className="font-mono">
+                      {ttfbMs != null ? `${Math.round(ttfbMs).toLocaleString()} ms` : "-"}
+                    </span>
+                  </div>
+                  <div className="flex justify-between">
+                    <span className="text-muted-foreground">
+                      {t("logs.details.performance.duration")}:
+                    </span>
+                    <span className="font-mono">
+                      {durationMs != null ? `${Math.round(durationMs).toLocaleString()} ms` : "-"}
+                    </span>
+                  </div>
+                  <div className="flex justify-between col-span-2">
+                    <span className="text-muted-foreground">
+                      {t("logs.details.performance.outputRate")}:
+                    </span>
+                    <span className="font-mono">
+                      {outputTokensPerSecond !== null
+                        ? `${outputTokensPerSecond.toFixed(1)} tok/s`
+                        : "-"}
+                    </span>
+                  </div>
+                </div>
+              </div>
+            </div>
+          )}
+
           {/* 模型重定向信息 */}
           {originalModel && currentModel && originalModel !== currentModel && (
             <div id="model-redirect-section" className="space-y-1.5">

src/app/[locale]/dashboard/logs/_components/usage-logs-table.tsx

@@ -375,6 +375,8 @@ export function UsageLogsTable({
                         costUsd={log.costUsd}
                         costMultiplier={log.costMultiplier}
                         context1mApplied={log.context1mApplied}
+                        durationMs={log.durationMs}
+                        ttfbMs={log.ttfbMs}
                         externalOpen={dialogState.logId === log.id ? true : undefined}
                         onExternalOpenChange={(open) => {
                           if (!open) setDialogState({ logId: null, scrollToRedirect: false });

src/app/[locale]/dashboard/logs/_components/virtualized-logs-table.tsx

@@ -520,6 +520,8 @@ export function VirtualizedLogsTable({
                       costUsd={log.costUsd}
                       costMultiplier={log.costMultiplier}
                       context1mApplied={log.context1mApplied}
+                      durationMs={log.durationMs}
+                      ttfbMs={log.ttfbMs}
                       externalOpen={dialogState.logId === log.id ? true : undefined}
                       onExternalOpenChange={(open) => {
                         if (!open) setDialogState({ logId: null, scrollToRedirect: false });

src/app/v1/_lib/proxy/response-handler.ts

@@ -234,6 +234,7 @@ export class ProxyResponseHandler {
           await updateMessageRequestDuration(messageContext.id, duration);
           await updateMessageRequestDetails(messageContext.id, {
             statusCode: statusCode,
+            ttfbMs: session.ttfbMs ?? duration,
             providerChain: session.getProviderChain(),
             model: session.getCurrentModel() ?? undefined, // ⭐ 更新重定向后的模型
             providerId: session.provider?.id, // ⭐ 更新最终供应商ID（重试切换后）
@@ -378,6 +379,7 @@ export class ProxyResponseHandler {
             statusCode: statusCode,
             inputTokens: usageMetrics?.input_tokens,
             outputTokens: usageMetrics?.output_tokens,
+            ttfbMs: session.ttfbMs ?? duration,
             cacheCreationInputTokens: usageMetrics?.cache_creation_input_tokens,
             cacheReadInputTokens: usageMetrics?.cache_read_input_tokens,
             cacheCreation5mInputTokens: usageMetrics?.cache_creation_5m_input_tokens,
@@ -572,6 +574,8 @@ export class ProxyResponseHandler {
         };
         if (sessionWithCleanup.clearResponseTimeout) {
           sessionWithCleanup.clearResponseTimeout();
+          // ⭐ 同步记录 TTFB，与首字节超时口径一致
+          session.recordTtfb();
           logger.debug(
             "[ResponseHandler] Gemini passthrough: First byte timeout cleared on response received",
             {
@@ -592,6 +596,7 @@ export class ProxyResponseHandler {
 
             const chunks: string[] = [];
             const decoder = new TextDecoder();
+            let isFirstChunk = true;
 
             while (true) {
               if (session.clientAbortSignal?.aborted) break;
@@ -599,6 +604,10 @@ export class ProxyResponseHandler {
               const { done, value } = await reader.read();
               if (done) break;
               if (value) {
+                if (isFirstChunk) {
+                  isFirstChunk = false;
+                  session.recordTtfb();
+                }
                 chunks.push(decoder.decode(value, { stream: true }));
               }
             }
@@ -928,6 +937,7 @@ export class ProxyResponseHandler {
           statusCode: statusCode,
           inputTokens: usageForCost?.input_tokens,
           outputTokens: usageForCost?.output_tokens,
+          ttfbMs: session.ttfbMs,
           cacheCreationInputTokens: usageForCost?.cache_creation_input_tokens,
           cacheReadInputTokens: usageForCost?.cache_read_input_tokens,
           cacheCreation5mInputTokens: usageForCost?.cache_creation_5m_input_tokens,
@@ -972,6 +982,7 @@ export class ProxyResponseHandler {
 
             // ⭐ 流式：读到第一块数据后立即清除响应超时定时器
             if (isFirstChunk) {
+              session.recordTtfb();
               isFirstChunk = false;
               const sessionWithCleanup = session as typeof session & {
                 clearResponseTimeout?: () => void;
@@ -1714,6 +1725,7 @@ async function finalizeRequestStats(
     // 即使没有 usageMetrics，也需要更新状态码和 provider chain
     await updateMessageRequestDetails(messageContext.id, {
       statusCode: statusCode,
+      ttfbMs: session.ttfbMs ?? duration,
       providerChain: session.getProviderChain(),
       model: session.getCurrentModel() ?? undefined,
       providerId: session.provider?.id, // ⭐ 更新最终供应商ID（重试切换后）
@@ -1789,6 +1801,7 @@ async function finalizeRequestStats(
     statusCode: statusCode,
     inputTokens: normalizedUsage.input_tokens,
     outputTokens: normalizedUsage.output_tokens,
+    ttfbMs: session.ttfbMs ?? duration,
     cacheCreationInputTokens: normalizedUsage.cache_creation_input_tokens,
     cacheReadInputTokens: normalizedUsage.cache_read_input_tokens,
     cacheCreation5mInputTokens: normalizedUsage.cache_creation_5m_input_tokens,
@@ -1927,6 +1940,7 @@ async function persistRequestFailure(options: {
       errorMessage,
       errorStack,
       errorCause,
+      ttfbMs: phase === "non-stream" ? (session.ttfbMs ?? duration) : session.ttfbMs,
       providerChain: session.getProviderChain(),
       model: session.getCurrentModel() ?? undefined,
       providerId: session.provider?.id, // ⭐ 更新最终供应商ID（重试切换后）

src/app/v1/_lib/proxy/session.ts

@@ -59,6 +59,9 @@ export class ProxySession {
   provider: Provider | null;
   messageContext: MessageContext | null;
 
+  // Time To First Byte (ms). Streaming: first chunk. Non-stream: equals durationMs.
+  ttfbMs: number | null = null;
+
   // Session ID（用于会话粘性和并发限流）
   sessionId: string | null;
 
@@ -240,6 +243,22 @@ export class ProxySession {
     }
   }
 
+  /**
+   * Record Time To First Byte (TTFB) for streaming responses.
+   *
+   * Definition: first body chunk received.
+   * Non-stream responses should persist TTFB as `durationMs` at finalize time.
+   */
+  recordTtfb(): number {
+    if (this.ttfbMs !== null) {
+      return this.ttfbMs;
+    }
+
+    const value = Math.max(0, Date.now() - this.startTime);
+    this.ttfbMs = value;
+    return value;
+  }
+
   /**
    * 设置 session ID
    */

src/drizzle/schema.ts

@@ -288,6 +288,7 @@ export const messageRequest = pgTable('message_request', {
   // Token 使用信息
   inputTokens: integer('input_tokens'),
   outputTokens: integer('output_tokens'),
+  ttfbMs: integer('ttfb_ms'),
   cacheCreationInputTokens: integer('cache_creation_input_tokens'),
   cacheReadInputTokens: integer('cache_read_input_tokens'),
   cacheCreation5mInputTokens: integer('cache_creation_5m_input_tokens'),

src/repository/leaderboard.ts

@@ -28,7 +28,8 @@ export interface ProviderLeaderboardEntry {
   totalCost: number;
   totalTokens: number;
   successRate: number; // 0-1 之间的小数，UI 层负责格式化为百分比
-  avgResponseTime: number; // 毫秒
+  avgTtfbMs: number; // 毫秒
+  avgTokensPerSecond: number; // tok/s（仅统计流式且可计算的请求）
 }
 
 /**
@@ -314,7 +315,20 @@ async function findProviderLeaderboardWithTimezone(
         / NULLIF(count(*)::double precision, 0),
         0::double precision
       )`,
-      avgResponseTime: sql<number>`COALESCE(avg(${messageRequest.durationMs})::double precision, 0::double precision)`,
+      avgTtfbMs: sql<number>`COALESCE(avg(${messageRequest.ttfbMs})::double precision, 0::double precision)`,
+      avgTokensPerSecond: sql<number>`COALESCE(
+        avg(
+          CASE
+            WHEN ${messageRequest.outputTokens} > 0
+              AND ${messageRequest.durationMs} IS NOT NULL
+              AND ${messageRequest.ttfbMs} IS NOT NULL
+              AND ${messageRequest.ttfbMs} < ${messageRequest.durationMs}
+            THEN (${messageRequest.outputTokens}::double precision)
+              / NULLIF((${messageRequest.durationMs} - ${messageRequest.ttfbMs}) / 1000.0, 0)
+          END
+        )::double precision,
+        0::double precision
+      )`,
     })
     .from(messageRequest)
     .innerJoin(
@@ -332,7 +346,8 @@ async function findProviderLeaderboardWithTimezone(
     totalCost: parseFloat(entry.totalCost),
     totalTokens: entry.totalTokens,
     successRate: entry.successRate ?? 0,
-    avgResponseTime: entry.avgResponseTime ?? 0,
+    avgTtfbMs: entry.avgTtfbMs ?? 0,
+    avgTokensPerSecond: entry.avgTokensPerSecond ?? 0,
   }));
 }
 

src/repository/message.ts

@@ -106,6 +106,7 @@ export async function updateMessageRequestDetails(
     statusCode?: number;
     inputTokens?: number;
     outputTokens?: number;
+    ttfbMs?: number | null;
     cacheCreationInputTokens?: number;
     cacheReadInputTokens?: number;
     cacheCreation5mInputTokens?: number;
@@ -133,6 +134,9 @@ export async function updateMessageRequestDetails(
   if (details.outputTokens !== undefined) {
     updateData.outputTokens = details.outputTokens;
   }
+  if (details.ttfbMs !== undefined) {
+    updateData.ttfbMs = details.ttfbMs;
+  }
   if (details.cacheCreationInputTokens !== undefined) {
     updateData.cacheCreationInputTokens = details.cacheCreationInputTokens;
   }

src/repository/usage-logs.ts

@@ -47,6 +47,7 @@ export interface UsageLogRow {
   costUsd: string | null;
   costMultiplier: string | null; // 供应商倍率
   durationMs: number | null;
+  ttfbMs: number | null;
   errorMessage: string | null;
   providerChain: ProviderChainItem[] | null;
   blockedBy: string | null; // 拦截类型（如 'sensitive_word'）
@@ -203,6 +204,7 @@ export async function findUsageLogsBatch(
       costUsd: messageRequest.costUsd,
       costMultiplier: messageRequest.costMultiplier,
       durationMs: messageRequest.durationMs,
+      ttfbMs: messageRequest.ttfbMs,
       errorMessage: messageRequest.errorMessage,
       providerChain: messageRequest.providerChain,
       blockedBy: messageRequest.blockedBy,
@@ -412,6 +414,7 @@ export async function findUsageLogsWithDetails(filters: UsageLogFilters): Promis
       costUsd: messageRequest.costUsd,
       costMultiplier: messageRequest.costMultiplier, // 供应商倍率
       durationMs: messageRequest.durationMs,
+      ttfbMs: messageRequest.ttfbMs,
       errorMessage: messageRequest.errorMessage,
       providerChain: messageRequest.providerChain,
       blockedBy: messageRequest.blockedBy, // 拦截类型

src/types/message.ts

@@ -181,6 +181,7 @@ export interface MessageRequest {
   key: string;
   model?: string;
   durationMs?: number;
+  ttfbMs?: number | null;
   costUsd?: string; // 单次请求费用（美元），保持高精度字符串表示
 
   // 供应商倍率（记录该请求使用的 cost_multiplier）