Sort GPUs newest first across leaderboard pages

frontend/src/api/api.ts

@@ -1,4 +1,5 @@
 import type { User } from "../lib/types/user";
+import { compareGpuTypes } from "../lib/utils/gpu";
 
 export class APIError extends Error {
   status: number;
@@ -117,7 +118,15 @@ export async function fetchLeaderBoard(id: string): Promise<LeaderboardDetail> {
     `[Perf] fetchLeaderBoard id=${id} | fetch=${fetchTime.toFixed(2)}ms | parse=${parseTime.toFixed(2)}ms | total=${totalTime.toFixed(2)}ms`,
   );
 
-  return r.data;
+  const data: LeaderboardDetail = r.data;
+  return {
+    ...data,
+    gpu_types: [...data.gpu_types].sort(compareGpuTypes),
+    // JSON object key order is not a GPU display order; normalize it for every page.
+    rankings: Object.fromEntries(
+      Object.entries(data.rankings).sort(([a], [b]) => compareGpuTypes(a, b)),
+    ),
+  };
 }
 
 export async function fetchCodes(
@@ -192,7 +201,14 @@ export async function fetchLeaderboardSummaries(
     `[Perf] fetchLeaderboardSummaries (${version}| ${forceRefreshCache})( | fetch=${fetchTime.toFixed(2)}ms | parse=${parseTime.toFixed(2)}ms | total=${totalTime.toFixed(2)}ms`,
   );
 
-  return r.data;
+  const data: LeaderboardSummariesResponse = r.data;
+  return {
+    ...data,
+    leaderboards: data.leaderboards.map((leaderboard) => ({
+      ...leaderboard,
+      gpu_types: [...leaderboard.gpu_types].sort(compareGpuTypes),
+    })),
+  };
 }
 
 export async function getMe(): Promise<User> {

frontend/src/lib/utils/gpu.ts

@@ -0,0 +1,11 @@
+// Keep GPU displays consistent with the leaderboard summary priority.
+const GPU_ORDER = ["B200", "H100", "MI300", "A100", "L4", "T4"];
+
+export function compareGpuTypes(a: string, b: string): number {
+  const aIndex = GPU_ORDER.indexOf(a.trim().toUpperCase());
+  const bIndex = GPU_ORDER.indexOf(b.trim().toUpperCase());
+  const aPriority = aIndex === -1 ? GPU_ORDER.length : aIndex;
+  const bPriority = bIndex === -1 ? GPU_ORDER.length : bIndex;
+
+  return aPriority - bPriority || a.localeCompare(b);
+}

frontend/src/pages/leaderboard/components/UserTrendChart.tsx

@@ -36,6 +36,7 @@ import {
   type UserSearchResult,
 } from "../../../api/api";
 import { isExpired } from "../../../lib/date/utils";
+import { compareGpuTypes } from "../../../lib/utils/gpu";
 import { formatMicrosecondsNum, formatMicroseconds } from "../../../lib/utils/ranking";
 import { useThemeStore } from "../../../lib/store/themeStore";
 import type {
@@ -266,7 +267,7 @@ export default function UserTrendChart({ leaderboardId, defaultUsers, defaultGpu
     const fastestTrendGpuTypes = fastestTrendData?.time_series ? Object.keys(fastestTrendData.time_series) : [];
     const gpuTypesFromUsers = data?.time_series ? Object.keys(data.time_series) : [];
     const gpuTypesFromCustom = customData?.time_series ? Object.keys(customData.time_series) : [];
-    const allGpuTypes = [...new Set([...gpuTypesFromUsers, ...gpuTypesFromCustom, ...fastestTrendGpuTypes])];
+    const allGpuTypes = [...new Set([...gpuTypesFromUsers, ...gpuTypesFromCustom, ...fastestTrendGpuTypes])].sort(compareGpuTypes);
     return selectedGpuType || allGpuTypes[0] || "";
   }, [selectedGpuType, data, customData, fastestTrendData]);
 
@@ -423,7 +424,7 @@ export default function UserTrendChart({ leaderboardId, defaultUsers, defaultGpu
         const result = await fetchUserTrend(leaderboardId, userIds);
         setData(result);
         // Set default GPU type to the one with the most unique users
-        const gpuTypes = Object.keys(result.time_series || {});
+        const gpuTypes = Object.keys(result.time_series || {}).sort(compareGpuTypes);
         if (gpuTypes.length > 0 && !gpuTypes.includes(selectedGpuType)) {
           // Count unique users per GPU type
           let maxUsers = 0;
@@ -566,7 +567,7 @@ export default function UserTrendChart({ leaderboardId, defaultUsers, defaultGpu
   // GPU types from user data or custom data
   const gpuTypesFromUsers = data?.time_series ? Object.keys(data.time_series) : [];
   const gpuTypesFromCustom = customData?.time_series ? Object.keys(customData.time_series) : [];
-  const gpuTypes = [...new Set([...gpuTypesFromUsers, ...gpuTypesFromCustom])];
+  const gpuTypes = [...new Set([...gpuTypesFromUsers, ...gpuTypesFromCustom])].sort(compareGpuTypes);
 
   // Apply axis range from input fields
   const handleApplyAxisRange = () => {