⚡ Bolt: Replace O(n²) nested loop with O(n) map accumulation#138
⚡ Bolt: Replace O(n²) nested loop with O(n) map accumulation#138
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📝 WalkthroughWalkthroughThe PR modifies the schedule grouping logic in Changes
Sequence DiagramsequenceDiagram
participant Client as Client Code
participant getSchedule as getSchedule()
participant Config as getEditionConfig()
participant API as Sessionize API
participant Transform as Data Transform
Client->>getSchedule: getSchedule(year)
getSchedule->>Config: getEditionConfig(year)
Config-->>getSchedule: edition config
getSchedule->>API: fetch schedule from /view/GridSmart
API-->>getSchedule: JSON response
getSchedule->>Transform: validate & group by time
Transform->>Transform: aggregate sessions by room<br/>sort by room & time
Transform-->>getSchedule: DailySchedule[]
getSchedule-->>Client: schedule data
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Possibly related PRs
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Review Summary by QodoOptimize schedule session aggregation with O(n) map accumulation
WalkthroughsDescription• Optimize session aggregation from O(n²) to O(n) complexity • Replace array spread operator with direct array mutation • Eliminate unnecessary array allocations in nested loop • Reduce garbage collection overhead during schedule processing Diagramflowchart LR
A["Nested loop over rooms and sessions"] --> B["Get existing sessions from map"]
B --> C["Check if sessions exist"]
C -->|No| D["Create new array with session"]
C -->|Yes| E["Push session to existing array"]
D --> F["Set in map"]
E --> F
F --> G["O(n) time complexity achieved"]
File Changes1. hooks/useSchedule.ts
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Code Review by Qodo
1. Accidental .orig file
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![gemini-code-assist[bot]](https://avatars.githubusercontent.com/in/956858?s=60&v=4){kind=small}
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Code Review
This pull request optimizes the getSchedule function by replacing array spreading with direct mutation to avoid performance overhead. Feedback suggests removing an accidentally committed .orig file and cleaning up tool-specific branding and redundant explanations within the code comments.
hooks/useSchedule.ts.orig
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| import { getEditionConfig } from "@/config/editions"; | ||
| import { format, parseISO } from "date-fns"; | ||
| import { cache } from "react"; | ||
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| export interface GridSession { | ||
| id: string; | ||
| title: string; | ||
| description: string | null; | ||
| startsAt: string; | ||
| endsAt: string; | ||
| isServiceSession: boolean; | ||
| isPlenumSession: boolean; | ||
| speakers: { id: string; name: string }[]; | ||
| roomId: number; | ||
| room: string; | ||
| status: string | null; | ||
| } | ||
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| export interface GridRoom { | ||
| id: number; | ||
| name: string; | ||
| sessions: GridSession[]; | ||
| hasOnlyPlenumSessions: boolean; | ||
| } | ||
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| export interface GridSchedule { | ||
| date: string; | ||
| isDefault: boolean; | ||
| rooms: GridRoom[]; | ||
| } | ||
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| export interface TimeSlot { | ||
| time: string; | ||
| sessions: GridSession[]; | ||
| } | ||
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| export interface DailySchedule { | ||
| date: string; | ||
| rooms: GridRoom[]; | ||
| timeSlots: TimeSlot[]; | ||
| } | ||
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| export const getSchedule = cache(async (year: string | number): Promise<DailySchedule[]> => { | ||
| const config = getEditionConfig(year); | ||
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| const url = `${config.sessionizeUrl}/view/GridSmart`; | ||
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| try { | ||
| const response = await fetch(url); | ||
| if (!response.ok) { | ||
| throw new Error(`Failed to fetch schedule: ${response.statusText}`); | ||
| } | ||
| const data: GridSchedule[] = await response.json(); | ||
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| return data.map((day) => { | ||
| const sessionsByTime = new Map<string, GridSession[]>(); | ||
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| day.rooms.forEach((room) => { | ||
| room.sessions.forEach((session) => { | ||
| const timeKey = format(parseISO(session.startsAt), "HH:mm"); | ||
| const existing = sessionsByTime.get(timeKey); | ||
| if (!existing) { | ||
| sessionsByTime.set(timeKey, [session]); | ||
| } else { | ||
| existing.push(session); | ||
| } | ||
| }); | ||
| }); | ||
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| const timeSlots: TimeSlot[] = Array.from(sessionsByTime.entries()) | ||
| .map(([time, sessions]) => ({ | ||
| time, | ||
| sessions: sessions.sort((a, b) => a.room.localeCompare(b.room)), | ||
| })) | ||
| .sort((a, b) => a.time.localeCompare(b.time)); | ||
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| return { | ||
| date: day.date, | ||
| rooms: day.rooms, | ||
| timeSlots, | ||
| }; | ||
| }); | ||
| } catch (error) { | ||
| console.error("Error fetching schedule:", error); | ||
| return []; | ||
| } | ||
| }); |
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This file appears to be a temporary artifact (likely from a merge conflict or a development tool) and should not be committed to the repository.
![qodo-code-review[bot]](https://avatars.githubusercontent.com/in/484649?s=60&v=4){kind=small}
hooks/useSchedule.ts.orig
Outdated
| import { getEditionConfig } from "@/config/editions"; | ||
| import { format, parseISO } from "date-fns"; | ||
| import { cache } from "react"; | ||
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| export interface GridSession { |
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1. Accidental .orig file 🐞 Bug ⚙ Maintainability
The PR adds hooks/useSchedule.ts.orig, which is a full duplicate of hooks/useSchedule.ts exporting the same getSchedule function and types. Keeping a second copy increases maintenance risk (future edits can diverge) and creates a footgun where someone can accidentally import/modify the wrong file.
Agent Prompt
### Issue description
`hooks/useSchedule.ts.orig` was added to the repo as a duplicate copy of `hooks/useSchedule.ts`. This looks like an editor/automation artifact and should not be committed.
### Issue Context
Leaving duplicate source files around makes future changes error-prone (the two copies can diverge) and increases the risk of accidental imports/usage.
### Fix Focus Areas
- hooks/useSchedule.ts.orig[1-87]
- .gitignore[1-143]
ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
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🧹 Nitpick comments (1)
hooks/useSchedule.ts.orig (1)
1-87: Please remove committed backup filehooks/useSchedule.ts.orig.This duplicates production logic from
hooks/useSchedule.tsand will drift over time. Keeping only one source of truth reduces maintenance risk.Suggested cleanup
diff --git a/hooks/useSchedule.ts.orig b/hooks/useSchedule.ts.orig deleted file mode 100644 --- a/hooks/useSchedule.ts.orig +++ /dev/null🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@hooks/useSchedule.ts.orig` around lines 1 - 87, Remove the committed backup file hooks/useSchedule.ts.orig which duplicates the production logic (see getSchedule in hooks/useSchedule.ts); delete the .orig file from the repo (e.g., git rm --cached or git rm and commit the deletion) so only hooks/useSchedule.ts remains as the single source of truth, and ensure there are no imports or references to hooks/useSchedule.ts.orig before pushing the change.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Nitpick comments:
In `@hooks/useSchedule.ts.orig`:
- Around line 1-87: Remove the committed backup file hooks/useSchedule.ts.orig
which duplicates the production logic (see getSchedule in hooks/useSchedule.ts);
delete the .orig file from the repo (e.g., git rm --cached or git rm and commit
the deletion) so only hooks/useSchedule.ts remains as the single source of
truth, and ensure there are no imports or references to
hooks/useSchedule.ts.orig before pushing the change.
ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: e2c580dc-4689-4234-9931-e5fcaf22d8bb
📒 Files selected for processing (2)
hooks/useSchedule.tshooks/useSchedule.ts.orig
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The issue below was found during a code review. Follow the provided context and guidance below and implement a solution Issue description
Issue ContextLeaving duplicate source files around makes future changes error-prone (the two copies can diverge) and increases the risk of accidental imports/usage. Fix Focus Areas
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Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
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Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
1 participant
💡 What: Replaced the array spread operator (
[...existing, session]) withpush()when building thesessionsByTimemap inhooks/useSchedule.ts.🎯 Why: The previous implementation created a new array on every iteration within a nested loop, resulting in O(N²) time complexity and unnecessary memory allocations.
📊 Impact: Changes the data aggregation from O(N²) to O(N) amortized time, lowering Garbage Collection overhead.
🔬 Measurement: Run the test suite (
npm run test) and confirm tests pass. Time complexity is mathematically reduced.PR created automatically by Jules for task 10590448881623300 started by @anyulled
Summary by CodeRabbit
New Features
Refactor