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perf(project-loading): eliminate repeated Codex session rescans and duplicate cursor fetches

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The staged changes remove the main source of project-load latency by avoiding repeated full scans of ~/.codex/sessions for every project and by removing redundant client-side cursor session refetches.

Server changes (server/projects.js):\n- Add a per-request Codex index reference in getProjects so Codex metadata is built once and reused across all projects, including manually added ones.\n- Introduce normalizeComparablePath() to canonicalize project paths (including Windows long-path prefixes and case-insensitive matching on Windows).\n- Introduce findCodexJsonlFiles() + buildCodexSessionsIndex() to perform a single recursive Codex scan and group sessions by normalized cwd.\n- Update getCodexSessions() to accept indexRef and read from the prebuilt index, with fallback index construction when no ref is provided.\n- Preserve existing session limiting behavior (limit=5 default, limit=0 returns all).

Client changes (src/hooks/useProjectsState.ts):\n- Remove loadCursorSessionsForProjects(), which previously triggered one extra /api/cursor/sessions request per project after /api/projects.\n- Use /api/projects response directly during initial load and refresh.\n- Expand projectsHaveChanges() to treat both cursorSessions and codexSessions as external session deltas.\n- Keep refresh comparison aligned with external session updates by using includeExternalSessions=true in sidebar refresh path.

Impact:\n- Reduces backend work from roughly O(projects * codex_session_files) to O(codex_session_files + projects) for Codex discovery during a project load cycle.\n- Removes an additional client-side O(projects) network fan-out for Cursor session fetches.\n- Improves perceived and actual sidebar project-loading time, especially in large session datasets.
This commit is contained in:
Haileyesus
2026-02-08 17:40:14 +03:00
parent 1d8b70f614
commit 89334cda4e
2 changed files with 116 additions and 97 deletions
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45
src/hooks/useProjectsState.ts
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@@ -1,6 +1,6 @@
import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
import type { NavigateFunction } from 'react-router-dom';
import { api, authenticatedFetch } from '../utils/api';
import { api } from '../utils/api';
import type {
AppSocketMessage,
AppTab,
@@ -23,7 +23,7 @@ const serialize = (value: unknown) => JSON.stringify(value ?? null);
const projectsHaveChanges = (
prevProjects: Project[],
nextProjects: Project[],
includeCursorSessions: boolean,
includeExternalSessions: boolean,
): boolean => {
if (prevProjects.length !== nextProjects.length) {
return true;
@@ -46,11 +46,14 @@ const projectsHaveChanges = (
return true;
}
if (!includeCursorSessions) {
if (!includeExternalSessions) {
return false;
}
return serialize(nextProject.cursorSessions) !== serialize(prevProject.cursorSessions);
return (
serialize(nextProject.cursorSessions) !== serialize(prevProject.cursorSessions) ||
serialize(nextProject.codexSessions) !== serialize(prevProject.codexSessions)
);
});
};
@@ -98,31 +101,6 @@ const isUpdateAdditive = (
);
};
const loadCursorSessionsForProjects = async (projects: Project[]): Promise<Project[]> => {
const projectsWithCursor = [...projects];
for (const project of projectsWithCursor) {
try {
const projectPath = project.fullPath || project.path;
const url = `/api/cursor/sessions?projectPath=${encodeURIComponent(projectPath ?? '')}`;
const response = await authenticatedFetch(url);
if (!response.ok) {
project.cursorSessions = [];
continue;
}
const data = await response.json();
project.cursorSessions = data.success && Array.isArray(data.sessions) ? data.sessions : [];
} catch (error) {
console.error(`Error fetching Cursor sessions for project ${project.name}:`, error);
project.cursorSessions = [];
}
}
return projectsWithCursor;
};
export function useProjectsState({
sessionId,
navigate,
@@ -149,15 +127,14 @@ export function useProjectsState({
setIsLoadingProjects(true);
const response = await api.projects();
const projectData = (await response.json()) as Project[];
const projectsWithCursor = await loadCursorSessionsForProjects(projectData);
setProjects((prevProjects) => {
if (prevProjects.length === 0) {
return projectsWithCursor;
return projectData;
}
return projectsHaveChanges(prevProjects, projectsWithCursor, true)
? projectsWithCursor
return projectsHaveChanges(prevProjects, projectData, true)
? projectData
: prevProjects;
});
} catch (error) {
@@ -421,7 +398,7 @@ export function useProjectsState({
const freshProjects = (await response.json()) as Project[];
setProjects((prevProjects) =>
projectsHaveChanges(prevProjects, freshProjects, false) ? freshProjects : prevProjects,
projectsHaveChanges(prevProjects, freshProjects, true) ? freshProjects : prevProjects,
);
if (!selectedProject) {