(sidebar)forget redis, better parallization

package.json

@@ -55,7 +55,6 @@
     "jose": "^6.1.3",
     "mermaid": "^11.12.2",
     "motion": "^12.23.26",
-    "redis": "^5.10.0",
     "solid-js": "^1.9.5",
     "solid-tiptap": "^0.8.0",
     "ua-parser-js": "^2.0.7",

src/components/Bars.tsx

@@ -46,6 +46,45 @@ interface ContributionDay {
   count: number;
 }
 
+interface GitActivityData {
+  githubCommits: GitCommit[];
+  giteaCommits: GitCommit[];
+  githubActivity: ContributionDay[];
+  giteaActivity: ContributionDay[];
+}
+
+// Shared fetch promise — whichever instance mounts first starts the fetch;
+// the second instance awaits the same Promise instead of firing its own requests.
+let gitActivityPromise: Promise<GitActivityData> | null = null;
+
+function fetchGitActivity(): Promise<GitActivityData> {
+  if (gitActivityPromise) return gitActivityPromise;
+
+  gitActivityPromise = (async () => {
+    const [ghCommits, gtCommits, ghActivity, gtActivity] = await Promise.all([
+      api.gitActivity.getGitHubCommits.query({ limit: 6 }).catch(() => []),
+      api.gitActivity.getGiteaCommits.query({ limit: 6 }).catch(() => []),
+      api.gitActivity.getGitHubActivity.query().catch(() => []),
+      api.gitActivity.getGiteaActivity.query().catch(() => [])
+    ]);
+
+    const displayedGithubCommits = ghCommits.slice(0, 3);
+    const githubShas = new Set(displayedGithubCommits.map((c) => c.sha));
+    const uniqueGiteaCommits = gtCommits
+      .filter((commit) => !githubShas.has(commit.sha))
+      .slice(0, 3);
+
+    return {
+      githubCommits: displayedGithubCommits,
+      giteaCommits: uniqueGiteaCommits,
+      githubActivity: ghActivity,
+      giteaActivity: gtActivity
+    };
+  })();
+
+  return gitActivityPromise;
+}
+
 export function RightBarContent() {
   const { setLeftBarVisible } = useBars();
   const [githubCommits, setGithubCommits] = createSignal<GitCommit[]>([]);
@@ -66,41 +105,20 @@ export function RightBarContent() {
   };
 
   onMount(() => {
-    const fetchData = async () => {
-      try {
-        // Fetch more commits to account for deduplication
-        const [ghCommits, gtCommits, ghActivity, gtActivity] =
-          await Promise.all([
-            api.gitActivity.getGitHubCommits
-              .query({ limit: 6 })
-              .catch(() => []),
-            api.gitActivity.getGiteaCommits.query({ limit: 6 }).catch(() => []),
-            api.gitActivity.getGitHubActivity.query().catch(() => []),
-            api.gitActivity.getGiteaActivity.query().catch(() => [])
-          ]);
-
-        // Take first 3 from GitHub
-        const displayedGithubCommits = ghCommits.slice(0, 3);
-
-        // Deduplicate Gitea commits - only against the 3 shown in GitHub section
-        const githubShas = new Set(displayedGithubCommits.map((c) => c.sha));
-        const uniqueGiteaCommits = gtCommits.filter(
-          (commit) => !githubShas.has(commit.sha)
-        );
-
-        setGithubCommits(displayedGithubCommits);
-        setGiteaCommits(uniqueGiteaCommits.slice(0, 3));
-        setGithubActivity(ghActivity);
-        setGiteaActivity(gtActivity);
-      } catch (error) {
-        console.error("Failed to fetch git activity:", error);
-      } finally {
-        setLoading(false);
-      }
-    };
-
     setTimeout(() => {
-      fetchData();
+      fetchGitActivity()
+        .then((data) => {
+          setGithubCommits(data.githubCommits);
+          setGiteaCommits(data.giteaCommits);
+          setGithubActivity(data.githubActivity);
+          setGiteaActivity(data.giteaActivity);
+        })
+        .catch((error) => {
+          console.error("Failed to fetch git activity:", error);
+        })
+        .finally(() => {
+          setLoading(false);
+        });
     }, 0);
   });
 

src/env/client.ts

@@ -1,80 +1,46 @@
-import { z } from "zod";
+export interface ClientEnv {
+  VITE_DOMAIN: string;
+  VITE_AWS_BUCKET_STRING: string;
+  VITE_DOWNLOAD_BUCKET_STRING: string;
+  VITE_GOOGLE_CLIENT_ID: string;
+  VITE_GOOGLE_CLIENT_ID_MAGIC_DELVE: string;
+  VITE_GITHUB_CLIENT_ID: string;
+  VITE_WEBSOCKET: string;
+  VITE_INFILL_ENDPOINT: string;
+}
 
-const clientEnvSchema = z.object({
+const requiredKeys: (keyof ClientEnv)[] = [
-  VITE_DOMAIN: z.string().min(1),
+  "VITE_DOMAIN",
-  VITE_AWS_BUCKET_STRING: z.string().min(1),
+  "VITE_AWS_BUCKET_STRING",
-  VITE_DOWNLOAD_BUCKET_STRING: z.string().min(1),
+  "VITE_DOWNLOAD_BUCKET_STRING",
-  VITE_GOOGLE_CLIENT_ID: z.string().min(1),
+  "VITE_GOOGLE_CLIENT_ID",
-  VITE_GOOGLE_CLIENT_ID_MAGIC_DELVE: z.string().min(1),
+  "VITE_GOOGLE_CLIENT_ID_MAGIC_DELVE",
-  VITE_GITHUB_CLIENT_ID: z.string().min(1),
+  "VITE_GITHUB_CLIENT_ID",
-  VITE_WEBSOCKET: z.string().min(1),
+  "VITE_WEBSOCKET",
-  VITE_INFILL_ENDPOINT: z.string().min(1)
+  "VITE_INFILL_ENDPOINT"
-});
+];
-
-export type ClientEnv = z.infer<typeof clientEnvSchema>;
 
 export const validateClientEnv = (
   envVars: Record<string, string | undefined>
 ): ClientEnv => {
-  try {
+  const missing = requiredKeys.filter(
-    return clientEnvSchema.parse(envVars);
+    (key) => !envVars[key] || envVars[key]!.trim() === ""
-  } catch (error) {
+  );
-    if (error instanceof z.ZodError) {
-      const formattedErrors = error.format();
-      const missingVars = Object.entries(formattedErrors)
-        .filter(
-          ([key, value]) =>
-            key !== "_errors" &&
-            typeof value === "object" &&
-            value._errors?.length > 0 &&
-            value._errors[0] === "Required"
-        )
-        .map(([key, _]) => key);
 
-      const invalidVars = Object.entries(formattedErrors)
+  if (missing.length > 0) {
-        .filter(
+    const message = `Client environment validation failed:\nMissing required variables: ${missing.join(", ")}`;
-          ([key, value]) =>
+    console.error(message);
-            key !== "_errors" &&
+    throw new Error(message);
-            typeof value === "object" &&
-            value._errors?.length > 0 &&
-            value._errors[0] !== "Required"
-        )
-        .map(([key, value]) => ({
-          key,
-          error: value._errors[0]
-        }));
-
-      let errorMessage = "Client environment validation failed:\n";
-
-      if (missingVars.length > 0) {
-        errorMessage += `Missing required variables: ${missingVars.join(", ")}\n`;
-      }
-
-      if (invalidVars.length > 0) {
-        errorMessage += "Invalid values:\n";
-        invalidVars.forEach(({ key, error }) => {
-          errorMessage += `  ${key}: ${error}\n`;
-        });
-      }
-
-      console.error(errorMessage);
-      throw new Error(errorMessage);
-    }
-    console.error(
-      "Client environment validation failed with unknown error:",
-      error
-    );
-    throw new Error("Client environment validation failed with unknown error");
   }
+
+  return envVars as unknown as ClientEnv;
 };
 
 const validateAndExportEnv = (): ClientEnv => {
   try {
     const validated = validateClientEnv(import.meta.env);
-    console.log("✅ Client environment validation successful");
     return validated;
   } catch (error) {
-    console.error("❌ Client environment validation failed:", error);
     throw error;
   }
 };
@@ -86,14 +52,5 @@ export const isMissingEnvVar = (varName: string): boolean => {
 };
 
 export const getMissingEnvVars = (): string[] => {
-  const requiredClientVars = [
+  return requiredKeys.filter((varName) => isMissingEnvVar(varName));
-    "VITE_DOMAIN",
-    "VITE_AWS_BUCKET_STRING",
-    "VITE_GOOGLE_CLIENT_ID",
-    "VITE_GOOGLE_CLIENT_ID_MAGIC_DELVE",
-    "VITE_GITHUB_CLIENT_ID",
-    "VITE_WEBSOCKET"
-  ];
-
-  return requiredClientVars.filter((varName) => isMissingEnvVar(varName));
 };

src/lib/performance-tracking.ts

@@ -24,66 +24,76 @@ export function initPerformanceTracking() {
     return;
   }
 
+  const supported = new Set(PerformanceObserver.supportedEntryTypes ?? []);
+
   // Observe LCP
-  try {
+  if (supported.has("largest-contentful-paint")) {
-    const lcpObserver = new PerformanceObserver((entryList) => {
+    try {
-      const entries = entryList.getEntries();
+      const lcpObserver = new PerformanceObserver((entryList) => {
-      const lastEntry = entries[entries.length - 1] as any;
+        const entries = entryList.getEntries();
-      metrics.lcp = lastEntry.renderTime || lastEntry.loadTime;
+        const lastEntry = entries[entries.length - 1] as any;
-    });
+        metrics.lcp = lastEntry.renderTime || lastEntry.loadTime;
-    lcpObserver.observe({ type: "largest-contentful-paint", buffered: true });
+      });
-  } catch (e) {
+      lcpObserver.observe({ type: "largest-contentful-paint", buffered: true });
-    console.debug("LCP not supported");
+    } catch (e) {
+      console.debug("LCP observer failed");
+    }
   }
 
   // Observe CLS
-  try {
+  if (supported.has("layout-shift")) {
-    const clsObserver = new PerformanceObserver((entryList) => {
+    try {
-      for (const entry of entryList.getEntries()) {
+      const clsObserver = new PerformanceObserver((entryList) => {
-        const layoutShift = entry as any;
+        for (const entry of entryList.getEntries()) {
-        if (!layoutShift.hadRecentInput) {
+          const layoutShift = entry as any;
-          clsValue += layoutShift.value;
+          if (!layoutShift.hadRecentInput) {
-          clsEntries.push(layoutShift.value);
+            clsValue += layoutShift.value;
+            clsEntries.push(layoutShift.value);
+          }
         }
-      }
+        metrics.cls = clsValue;
-      metrics.cls = clsValue;
+      });
-    });
+      clsObserver.observe({ type: "layout-shift", buffered: true });
-    clsObserver.observe({ type: "layout-shift", buffered: true });
+    } catch (e) {
-  } catch (e) {
+      console.debug("CLS observer failed");
-    console.debug("CLS not supported");
+    }
   }
 
   // Observe FID
-  try {
+  if (supported.has("first-input")) {
-    const fidObserver = new PerformanceObserver((entryList) => {
+    try {
-      const firstInput = entryList.getEntries()[0] as any;
+      const fidObserver = new PerformanceObserver((entryList) => {
-      if (firstInput) {
+        const firstInput = entryList.getEntries()[0] as any;
-        metrics.fid = firstInput.processingStart - firstInput.startTime;
+        if (firstInput) {
-      }
+          metrics.fid = firstInput.processingStart - firstInput.startTime;
-    });
+        }
-    fidObserver.observe({ type: "first-input", buffered: true });
+      });
-  } catch (e) {
+      fidObserver.observe({ type: "first-input", buffered: true });
-    console.debug("FID not supported");
+    } catch (e) {
+      console.debug("FID observer failed");
+    }
   }
 
   // Observe INP (event timing)
-  try {
+  if (supported.has("event")) {
-    const interactions: number[] = [];
+    try {
-    const inpObserver = new PerformanceObserver((entryList) => {
+      const interactions: number[] = [];
-      for (const entry of entryList.getEntries()) {
+      const inpObserver = new PerformanceObserver((entryList) => {
-        const eventEntry = entry as any;
+        for (const entry of entryList.getEntries()) {
-        if (eventEntry.interactionId) {
+          const eventEntry = entry as any;
-          interactions.push(eventEntry.duration);
+          if (eventEntry.interactionId) {
-          const sorted = [...interactions].sort((a, b) => b - a);
+            interactions.push(eventEntry.duration);
-          const p98Index = Math.floor(sorted.length * 0.02);
+            const sorted = [...interactions].sort((a, b) => b - a);
-          inpValue = sorted[p98Index] || sorted[0] || 0;
+            const p98Index = Math.floor(sorted.length * 0.02);
-          metrics.inp = inpValue;
+            inpValue = sorted[p98Index] || sorted[0] || 0;
+            metrics.inp = inpValue;
+          }
         }
-      }
+      });
-    });
+      inpObserver.observe({ type: "event", buffered: true });
-    inpObserver.observe({ type: "event", buffered: true });
+    } catch (e) {
-  } catch (e) {
+      console.debug("INP observer failed");
-    console.debug("INP not supported");
+    }
   }
 
   // Get navigation timing metrics

src/server/api/routers/git-activity.ts

@@ -49,73 +49,29 @@ export const gitActivityRouter = createTRPCRouter({
           const events = await eventsResponse.json();
           const allCommits: GitCommit[] = [];
 
-          // Extract push events and fetch commit details
+          // Extract commits directly from PushEvent payload — no per-commit API calls needed
           for (const event of events) {
             if (event.type !== "PushEvent") continue;
-            if (allCommits.length >= input.limit * 5) break; // Get extra to ensure we have enough
+            if (allCommits.length >= input.limit) break;
 
             const repoName = event.repo.name;
-            const commitSha = event.payload.head;
+            const payloadCommits: any[] = event.payload.commits || [];
 
-            try {
+            for (const payloadCommit of payloadCommits) {
-              // Fetch the actual commit details to get the message
+              if (allCommits.length >= input.limit) break;
-              const commitResponse = await fetchWithTimeout(
+              allCommits.push({
-                `https://api.github.com/repos/${repoName}/commits/${commitSha}`,
+                sha: payloadCommit.sha?.substring(0, 7) || "unknown",
-                {
+                message: payloadCommit.message?.split("\n")[0] || "No message",
-                  headers: {
+                author: payloadCommit.author?.name || "Unknown",
-                    Authorization: `Bearer ${env.GITHUB_API_TOKEN}`,
+                // event.created_at is the push timestamp — close enough to commit date
-                    Accept: "application/vnd.github.v3+json"
+                date: event.created_at || new Date().toISOString(),
-                  },
+                repo: repoName,
-                  timeout: 5000
+                url: `https://github.com/${repoName}/commit/${payloadCommit.sha}`
-                }
+              });
-              );
-
-              if (commitResponse.ok) {
-                const commit = await commitResponse.json();
-
-                // Filter for your commits
-                if (
-                  commit.author?.login === "MikeFreno" ||
-                  commit.author?.login === "mikefreno" ||
-                  commit.commit?.author?.email?.includes("mike")
-                ) {
-                  allCommits.push({
-                    sha: commit.sha?.substring(0, 7) || "unknown",
-                    message:
-                      commit.commit?.message?.split("\n")[0] || "No message",
-                    author:
-                      commit.commit?.author?.name ||
-                      commit.author?.login ||
-                      "Unknown",
-                    date:
-                      commit.commit?.author?.date || new Date().toISOString(),
-                    repo: repoName,
-                    url: `https://github.com/${repoName}/commit/${commit.sha}`
-                  });
-                }
-              }
-            } catch (error) {
-              if (
-                error instanceof NetworkError ||
-                error instanceof TimeoutError
-              ) {
-                console.warn(
-                  `Network error fetching commit ${commitSha} for ${repoName}, skipping`
-                );
-              } else {
-                console.error(
-                  `Error fetching commit ${commitSha} for ${repoName}:`,
-                  error
-                );
-              }
             }
           }
 
-          // Already sorted by event date, but sort again by commit date to be precise
+          // Events are already in reverse-chronological order
-          allCommits.sort(
-            (a, b) => new Date(b.date).getTime() - new Date(a.date).getTime()
-          );
-
           return allCommits.slice(0, input.limit);
         },
         { maxStaleMs: CACHE_CONFIG.GIT_ACTIVITY_MAX_STALE_MS }
@@ -155,13 +111,11 @@ export const gitActivityRouter = createTRPCRouter({
 
           await checkResponse(reposResponse);
           const repos = await reposResponse.json();
-          const allCommits: GitCommit[] = [];
 
-          for (const repo of repos) {
+          // Fetch commits for all repos in parallel instead of serially
-            if (allCommits.length >= input.limit * 3) break; // Get extra to sort later
+          const commitResults = await Promise.allSettled(
-
+            repos.map((repo: any) =>
-            try {
+              fetchWithTimeout(
-              const commitsResponse = await fetchWithTimeout(
                 `${env.GITEA_URL}/api/v1/repos/Mike/${repo.name}/commits?limit=5`,
                 {
                   headers: {
@@ -170,46 +124,36 @@ export const gitActivityRouter = createTRPCRouter({
                   },
                   timeout: 10000
                 }
-              );
+              )
+                .then((res) => (res.ok ? res.json() : []))
+                .catch(() => [])
+            )
+          );
 
-              if (commitsResponse.ok) {
+          const allCommits: GitCommit[] = [];
-                const commits = await commitsResponse.json();
+          for (let i = 0; i < commitResults.length; i++) {
-                for (const commit of commits) {
+            const result = commitResults[i];
-                  if (
+            if (result.status === "rejected") continue;
-                    (commit.commit?.author?.email &&
+            const repo = repos[i];
-                      commit.commit.author.email.includes(
+            const commits: any[] = result.value;
-                        "michael@freno.me"
+            for (const commit of commits) {
-                      )) ||
+              const email: string = commit.commit?.author?.email ?? "";
-                    commit.commit.author.email.includes(
-                      "michaelt.freno@gmail.com"
-                    ) // Filter for your commits
-                  ) {
-                    allCommits.push({
-                      sha: commit.sha?.substring(0, 7) || "unknown",
-                      message:
-                        commit.commit?.message?.split("\n")[0] || "No message",
-                      author: commit.commit?.author?.name || repo.owner.login,
-                      date:
-                        commit.commit?.author?.date || new Date().toISOString(),
-                      repo: repo.full_name,
-                      url: `${env.GITEA_URL}/${repo.full_name}/commit/${commit.sha}`
-                    });
-                  }
-                }
-              }
-            } catch (error) {
               if (
-                error instanceof NetworkError ||
+                email.includes("michael@freno.me") ||
-                error instanceof TimeoutError
+                email.includes("michaelt.freno@gmail.com")
               ) {
-                console.warn(
+                allCommits.push({
-                  `Network error fetching commits for ${repo.name}, skipping`
+                  sha: commit.sha?.substring(0, 7) || "unknown",
-                );
+                  message:
-              } else {
+                    commit.commit?.message?.split("\n")[0] || "No message",
-                console.error(
+                  author:
-                  `Error fetching commits for ${repo.name}:`,
+                    commit.commit?.author?.name ||
-                  error
+                    repo.owner?.login ||
-                );
+                    "Unknown",
+                  date: commit.commit?.author?.date || new Date().toISOString(),
+                  repo: repo.full_name,
+                  url: `${env.GITEA_URL}/${repo.full_name}/commit/${commit.sha}`
+                });
               }
             }
           }
@@ -336,11 +280,13 @@ export const gitActivityRouter = createTRPCRouter({
 
         const threeMonthsAgo = new Date();
         threeMonthsAgo.setMonth(threeMonthsAgo.getMonth() - 3);
+        const sinceParam = threeMonthsAgo.toISOString();
 
-        for (const repo of repos) {
+        // Fetch commits for all repos in parallel, scoped to the 3-month window
-          try {
+        const commitResults = await Promise.allSettled(
-            const commitsResponse = await fetchWithTimeout(
+          repos.map((repo: any) =>
-              `${env.GITEA_URL}/api/v1/repos/${repo.owner.login}/${repo.name}/commits?limit=100`,
+            fetchWithTimeout(
+              `${env.GITEA_URL}/api/v1/repos/${repo.owner.login}/${repo.name}/commits?limit=100&since=${sinceParam}`,
               {
                 headers: {
                   Authorization: `token ${env.GITEA_TOKEN}`,
@@ -348,31 +294,23 @@ export const gitActivityRouter = createTRPCRouter({
                 },
                 timeout: 10000
               }
-            );
+            )
+              .then((res) => (res.ok ? res.json() : []))
+              .catch(() => [])
+          )
+        );
 
-            if (commitsResponse.ok) {
+        for (const result of commitResults) {
-              const commits = await commitsResponse.json();
+          if (result.status === "rejected") continue;
-              for (const commit of commits) {
+          const commits: any[] = result.value;
-                const date = new Date(commit.commit.author.date)
+          for (const commit of commits) {
-                  .toISOString()
+            const date = new Date(commit.commit.author.date)
-                  .split("T")[0];
+              .toISOString()
-                contributionsByDay.set(
+              .split("T")[0];
-                  date,
+            contributionsByDay.set(
-                  (contributionsByDay.get(date) || 0) + 1
+              date,
-                );
+              (contributionsByDay.get(date) || 0) + 1
-              }
+            );
-            }
-          } catch (error) {
-            if (
-              error instanceof NetworkError ||
-              error instanceof TimeoutError
-            ) {
-              console.warn(
-                `Network error fetching commits for ${repo.name}, skipping`
-              );
-            } else {
-              console.error(`Error fetching commits for ${repo.name}:`, error);
-            }
           }
         }
 

src/server/cache.ts

@@ -1,167 +1,89 @@
 /**
- * Redis-backed Cache for Serverless
+ * In-memory cache with TTL
  *
- * Uses Redis for persistent caching across serverless invocations.
+ * Redis was replaced because on a low-traffic site the cache TTL almost always
- * Redis provides:
+ * expires between visits, so every request paid Redis connection + round-trip
- * - Fast in-memory storage
+ * overhead with no benefit. A module-level Map has zero network latency:
- * - Built-in TTL expiration (automatic cleanup)
+ * cache hits are a single dictionary lookup, misses fall through immediately.
- * - Persistence across function invocations
- * - Native support in Vercel and other platforms
  */
 
-import { createClient } from "redis";
-import { env } from "~/env/server";
 import { CACHE_CONFIG } from "~/config";
 
-let redisClient: ReturnType<typeof createClient> | null = null;
+interface CacheEntry<T> {
-let isConnecting = false;
+  data: T;
-let connectionError: Error | null = null;
+  /** Absolute timestamp (ms) after which this entry is considered stale */
-
+  expiresAt: number;
-/**
+  /** Absolute timestamp (ms) after which stale fallback is also discarded */
- * Get or create Redis client (singleton pattern)
+  staleExpiresAt: number;
- */
-async function getRedisClient() {
-  if (redisClient && redisClient.isOpen) {
-    return redisClient;
-  }
-
-  if (isConnecting) {
-    // Wait for existing connection attempt
-    await new Promise((resolve) => setTimeout(resolve, 100));
-    return getRedisClient();
-  }
-
-  if (connectionError) {
-    throw connectionError;
-  }
-
-  try {
-    isConnecting = true;
-    redisClient = createClient({ url: env.REDIS_URL });
-
-    redisClient.on("error", (err) => {
-      console.error("Redis Client Error:", err);
-      connectionError = err;
-    });
-
-    await redisClient.connect();
-    isConnecting = false;
-    connectionError = null;
-    return redisClient;
-  } catch (error) {
-    isConnecting = false;
-    connectionError = error as Error;
-    console.error("Failed to connect to Redis:", error);
-    throw error;
-  }
 }
 
-/**
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
- * Redis-backed cache interface
+const store = new Map<string, CacheEntry<any>>();
- */
+
 export const cache = {
-  async get<T>(key: string): Promise<T | null> {
+  get<T>(key: string): T | null {
-    try {
+    const entry = store.get(key) as CacheEntry<T> | undefined;
-      const client = await getRedisClient();
+    if (!entry) return null;
-      const value = await client.get(key);
+    if (Date.now() > entry.expiresAt) return null;
+    return entry.data;
+  },
 
-      if (!value) {
+  set<T>(key: string, data: T, ttlMs: number): void {
-        return null;
+    const existing = store.get(key);
-      }
+    store.set(key, {
+      data,
+      expiresAt: Date.now() + ttlMs,
+      // Preserve an existing stale expiry if it's longer, otherwise default
+      staleExpiresAt:
+        existing?.staleExpiresAt ?? Date.now() + CACHE_CONFIG.MAX_STALE_DATA_MS
+    });
+  },
 
-      return JSON.parse(value) as T;
+  delete(key: string): void {
-    } catch (error) {
+    store.delete(key);
-      console.error(`Cache get error for key "${key}":`, error);
+  },
-      return null;
+
+  deleteByPrefix(prefix: string): void {
+    for (const key of store.keys()) {
+      if (key.startsWith(prefix)) store.delete(key);
     }
   },
 
-  async set<T>(key: string, data: T, ttlMs: number): Promise<void> {
+  clear(): void {
-    try {
+    store.clear();
-      const client = await getRedisClient();
-      const value = JSON.stringify(data);
-
-      // Redis SET with EX (expiry in seconds)
-      await client.set(key, value, {
-        EX: Math.ceil(ttlMs / 1000)
-      });
-    } catch (error) {
-      console.error(`Cache set error for key "${key}":`, error);
-    }
   },
 
-  async delete(key: string): Promise<void> {
+  has(key: string): boolean {
-    try {
+    const entry = store.get(key);
-      const client = await getRedisClient();
+    if (!entry) return false;
-      await client.del(key);
+    return Date.now() <= entry.expiresAt;
-    } catch (error) {
-      console.error(`Cache delete error for key "${key}":`, error);
-    }
-  },
-
-  async deleteByPrefix(prefix: string): Promise<void> {
-    try {
-      const client = await getRedisClient();
-      const keys = await client.keys(`${prefix}*`);
-
-      if (keys.length > 0) {
-        await client.del(keys);
-      }
-    } catch (error) {
-      console.error(
-        `Cache deleteByPrefix error for prefix "${prefix}":`,
-        error
-      );
-    }
-  },
-
-  async clear(): Promise<void> {
-    try {
-      const client = await getRedisClient();
-      await client.flushDb();
-    } catch (error) {
-      console.error("Cache clear error:", error);
-    }
-  },
-
-  async has(key: string): Promise<boolean> {
-    try {
-      const client = await getRedisClient();
-      const exists = await client.exists(key);
-      return exists === 1;
-    } catch (error) {
-      console.error(`Cache has error for key "${key}":`, error);
-      return false;
-    }
   }
 };
 
 /**
- * Execute function with Redis caching
+ * Execute function with in-memory caching.
  */
 export async function withCache<T>(
   key: string,
   ttlMs: number,
   fn: () => Promise<T>
 ): Promise<T> {
-  const cached = await cache.get<T>(key);
+  const cached = cache.get<T>(key);
-  if (cached !== null) {
+  if (cached !== null) return cached;
-    return cached;
-  }
 
   const result = await fn();
-  await cache.set(key, result, ttlMs);
+  cache.set(key, result, ttlMs);
   return result;
 }
 
 /**
- * Execute function with Redis caching and stale data fallback
+ * Execute function with caching and stale-data fallback.
  *
  * Strategy:
- * 1. Try to get fresh cached data (within TTL)
+ * 1. Return data if fresh (within TTL).
- * 2. If not found, execute function
+ * 2. Otherwise run fn().
- * 3. If function fails, try to get stale data (ignore TTL)
+ * 3. If fn() throws, return stale data if still within maxStaleMs.
- * 4. Store result with TTL for future requests
+ * 4. Store fresh result for future requests.
  */
 export async function withCacheAndStale<T>(
   key: string,
@@ -175,34 +97,29 @@ export async function withCacheAndStale<T>(
   const { maxStaleMs = CACHE_CONFIG.MAX_STALE_DATA_MS, logErrors = true } =
     options;
 
-  // Try fresh cache
+  const now = Date.now();
-  const cached = await cache.get<T>(key);
+  const entry = store.get(key) as CacheEntry<T> | undefined;
-  if (cached !== null) {
+
-    return cached;
+  // Fresh hit
-  }
+  if (entry && entry.expiresAt > now) return entry.data;
 
   try {
-    // Execute function
     const result = await fn();
-    await cache.set(key, result, ttlMs);
+    store.set(key, {
-    // Also store with longer TTL for stale fallback
+      data: result,
-    const staleKey = `${key}:stale`;
+      expiresAt: now + ttlMs,
-    await cache.set(staleKey, result, maxStaleMs);
+      staleExpiresAt: now + maxStaleMs
+    });
     return result;
   } catch (error) {
     if (logErrors) {
       console.error(`Error fetching data for cache key "${key}":`, error);
     }
 
-    // Try stale cache with longer TTL key
+    // Stale fallback
-    const staleKey = `${key}:stale`;
+    if (entry && entry.staleExpiresAt > now) {
-    const staleData = await cache.get<T>(staleKey);
+      if (logErrors) console.log(`Serving stale data for cache key "${key}"`);
-
+      return entry.data;
-    if (staleData !== null) {
-      if (logErrors) {
-        console.log(`Serving stale data for cache key "${key}"`);
-      }
-      return staleData;
     }
 
     throw error;