⚡ Bolt: Optimize project detail page data fetching by aicoder2009 · Pull Request #26 · aicoder2009/opencitation

aicoder2009 · 2026-04-27T08:24:11Z

💡 What: The data fetching logic in src/app/projects/[id]/page.tsx was optimized to run parallel independent fetches, and defer fetching data that isn't immediately necessary for the UI.
🎯 Why: The project detail page was sequentially fetching project data, then lists data, then all lists data. This blocked the render thread longer than necessary.
📊 Impact: This cuts Time-to-Interactive (TTI) since the major project data fetches are executed concurrently. It also removes one network request (/api/lists) from the critical path entirely, only loading it if the user wants to append an existing list.
🔬 Measurement: Verify by using the "Network" tab in devtools on /projects/:id to see the concurrent timing of /api/projects/:id and /api/projects/:id/lists. Ensure /api/lists is only requested upon clicking "Add List".

PR created automatically by Jules for task 3229720793011527760 started by @aicoder2009

- Fetch `project` details and `lists` within the project concurrently via `Promise.all()` to reduce initial blocking sequence on render. - Lazy load `allLists` to only fetch when the user triggers the "Add List" UI, trimming unnecessary initial network load. Co-authored-by: aicoder2009 <[email protected]>

google-labs-jules · 2026-04-27T08:24:13Z

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vercel · 2026-04-27T08:24:13Z

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Project	Deployment	Actions	Updated (UTC)
opencitation	Ready	Preview, Comment	May 1, 2026 6:25pm

Copilot

Pull request overview

Optimizes the /projects/[id] detail page’s client-side data fetching to reduce time-to-interactive by parallelizing independent requests and deferring non-critical data until the user initiates an action.

Changes:

Fetch project details and project lists concurrently via Promise.all() in src/app/projects/[id]/page.tsx.
Lazily fetch “all user lists” (/api/lists) only when the user opens the “Add List” UI.
Add a Jules “Bolt” learning note documenting the performance approach.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/app/projects/[id]/page.tsx	Parallelizes project + project-lists fetch; defers all-lists fetch until user opens add-list UI.
evaluate_page.py	Adds a Python helper script that checks for a substring in the page file.
.jules/bolt.md	Documents the “concurrent + lazy fetch” approach as a learning/action item.

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Copilot · 2026-04-27T08:27:40Z

                This project has no lists yet.
              </p>
-              <WikiButton variant="primary" onClick={() => setShowAddList(true)}>
+              <WikiButton variant="primary" onClick={() => { setShowAddList(true); if (!hasFetchedAllLists) fetchAllUserLists(); }}>


This inline click handler duplicates the “open add list + lazy fetch all lists” behavior implemented in handleToggleAddList, which increases the chance of the two code paths drifting (and makes it harder to add loading/error UI for the add-list panel). Consider reusing the shared handler or extracting a dedicated handleOpenAddList helper used by both buttons.

Suggested change

<WikiButton variant="primary" onClick={() => { setShowAddList(true); if (!hasFetchedAllLists) fetchAllUserLists(); }}>

<WikiButton

variant="primary"

onClick={() => {

if (!showAddList) {

handleToggleAddList();

}

}}

>

Copilot · 2026-04-27T08:27:40Z

+import re
+
+with open("src/app/projects/[id]/page.tsx", "r") as f:
+    content = f.read()
+
+if "fetchProjectAndLists" not in content:
+    print("Function not found")
+else:
+    print("Function found")


This Python script appears to be a one-off verification helper (it just checks for a substring in a TSX file) and introduces an otherwise-unused Python artifact into a Node/Next.js repo (there are no npm scripts or other Python utilities). Recommend removing it from the PR, or moving it under scripts/ and rewriting it in TS/JS (or wiring it into CI) if it’s intended to be kept. Also, re is imported but unused.

Suggested change

import re

with open("src/app/projects/[id]/page.tsx", "r") as f:

content = f.read()

if "fetchProjectAndLists" not in content:

print("Function not found")

else:

print("Function found")

import argparse

import sys

def main() -> int:

parser = argparse.ArgumentParser(

description="Verify that a source file contains a required substring."

)

parser.add_argument(

"file_path",

nargs="?",

default="src/app/projects/[id]/page.tsx",

help="Path to the file to inspect.",

)

parser.add_argument(

"expected_text",

nargs="?",

default="fetchProjectAndLists",

help="Substring that must be present in the file.",

)

args = parser.parse_args()

with open(args.file_path, "r", encoding="utf-8") as f:

content = f.read()

if args.expected_text not in content:

print("Function not found")

return 1

print("Function found")

return 0

if __name__ == "__main__":

sys.exit(main())

Copilot · 2026-04-27T08:27:41Z

      if (allListsResult.success) {
        setAllLists(allListsResult.data);
+        setHasFetchedAllLists(true);
      }
    } catch (err) {
-      console.error("Error fetching project:", err);
-      setError("Failed to load project");
-    } finally {
-      setIsLoading(false);
+      console.error("Error fetching all user lists:", err);
+    }


fetchAllUserLists swallows failures (only logs to console). If /api/lists fails or returns non-success, the “Add existing list” section will silently stay empty with no user feedback. Consider setting error (or a dedicated allListsError / loading state for the add-list panel) when the request fails or when allListsResult.success is false so the UI can explain what happened.

…27760

Copilot AI review requested due to automatic review settings April 27, 2026 08:24

Copilot started reviewing on behalf of aicoder2009 April 27, 2026 08:24 View session

vercel Bot deployed to Preview April 27, 2026 08:25 View deployment

Copilot AI reviewed Apr 27, 2026

View reviewed changes

aicoder2009 closed this May 1, 2026

aicoder2009 reopened this May 1, 2026

Merge branch 'main' into bolt-optimize-project-details-32297207930115…

88cfe6d

…27760

vercel Bot deployed to Preview May 1, 2026 18:25 View deployment

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⚡ Bolt: Optimize project detail page data fetching#26

⚡ Bolt: Optimize project detail page data fetching#26
aicoder2009 wants to merge 2 commits intomainfrom
bolt-optimize-project-details-3229720793011527760

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-import re
-with open("src/app/projects/[id]/page.tsx", "r") as f:
-    content = f.read()
-if "fetchProjectAndLists" not in content:
-    print("Function not found")
-else:
-    print("Function found")
+import argparse
+import sys
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Verify that a source file contains a required substring."
+    )
+    parser.add_argument(
+        "file_path",
+        nargs="?",
+        default="src/app/projects/[id]/page.tsx",
+        help="Path to the file to inspect.",
+    )
+    parser.add_argument(
+        "expected_text",
+        nargs="?",
+        default="fetchProjectAndLists",
+        help="Substring that must be present in the file.",
+    )
+    args = parser.parse_args()
+    with open(args.file_path, "r", encoding="utf-8") as f:
+        content = f.read()
+    if args.expected_text not in content:
+        print("Function not found")
+        return 1
+    print("Function found")
+    return 0
+if __name__ == "__main__":
+    sys.exit(main())

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Pull request overview

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vercel Bot commented Apr 27, 2026 •

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