From a941e030371ab2c37fc3f8707a3debcb369c20be Mon Sep 17 00:00:00 2001
From: Aly Raffauf <aly@aly.codes>
Date: Wed, 29 Jul 2026 17:45:27 -0400
Subject: [PATCH] Stop prefetching repository directories

---
 src/hooks/useRepoTree.ts | 37 +------------------------------------
 1 file changed, 1 insertion(+), 36 deletions(-)

diff --git a/src/hooks/useRepoTree.ts b/src/hooks/useRepoTree.ts
index 1ad1c71..8902fcd 100644
--- a/src/hooks/useRepoTree.ts
+++ b/src/hooks/useRepoTree.ts
@@ -1,9 +1,7 @@
 import type { $output as RepoTreeResponse } from '@atcute/tangled/types/repo/tree'
 import { useEffect, useRef, useState } from 'react'
 import type { Repo } from '../lib/tangled'
-import { getRepoTree, isDirectoryMode } from '../lib/tangled/repo'
-
-const MAX_PREFETCHED_DIRECTORIES = 3
+import { getRepoTree } from '../lib/tangled/repo'
 
 type UseRepoTreeOptions = {
   initialTree?: RepoTreeResponse
@@ -13,13 +11,11 @@ type UseRepoTreeOptions = {
 
 export function useRepoTree({ initialTree, path, repo }: UseRepoTreeOptions) {
   const cache = useRef(new Map<string, RepoTreeResponse>())
-  const prefetching = useRef(new Set<string>())
   const [tree, setTree] = useState<RepoTreeResponse | null>(initialTree ?? null)
   const [error, setError] = useState<Error | null>(null)
 
   useEffect(() => {
     cache.current.clear()
-    prefetching.current.clear()
 
     if (initialTree !== undefined) {
       cache.current.set('', initialTree)
@@ -36,7 +32,6 @@ export function useRepoTree({ initialTree, path, repo }: UseRepoTreeOptions) {
     if (cachedTree !== undefined) {
       setTree(cachedTree)
       setError(null)
-      void prefetchDirectories(repo, cachedTree, path, cache.current, prefetching.current)
       return
     }
 
@@ -50,7 +45,6 @@ export function useRepoTree({ initialTree, path, repo }: UseRepoTreeOptions) {
 
         if (!isCancelled) {
           setTree(response)
-          void prefetchDirectories(repo, response, path, cache.current, prefetching.current)
         }
       } catch (caught) {
         if (!isCancelled) {
@@ -68,32 +62,3 @@ export function useRepoTree({ initialTree, path, repo }: UseRepoTreeOptions) {
 
   return { error, tree }
 }
-
-async function prefetchDirectories(
-  repo: Repo,
-  tree: RepoTreeResponse,
-  currentPath: string,
-  cache: Map<string, RepoTreeResponse>,
-  prefetching: Set<string>,
-): Promise<void> {
-  const directories = tree.files
-    .filter((entry) => isDirectoryMode(entry.mode))
-    .map((entry) => (currentPath ? `${currentPath}/${entry.name}` : entry.name))
-    .slice(0, MAX_PREFETCHED_DIRECTORIES)
-
-  await Promise.all(
-    directories.map(async (directoryPath) => {
-      if (cache.has(directoryPath) || prefetching.has(directoryPath)) return
-
-      prefetching.add(directoryPath)
-      try {
-        const childTree = await getRepoTree(repo, directoryPath)
-        cache.set(directoryPath, childTree)
-      } catch {
-        // Navigation retries directories whose background prefetch failed.
-      } finally {
-        prefetching.delete(directoryPath)
-      }
-    }),
-  )
-}
-- 
2.51.2