feat: [performance improvement]#258
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Replaced O(N*M) nested loop with an O(N) hash map lookup when matching job offers to sponsors. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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📝 WalkthroughWalkthroughSingle-file refactoring in ChangesOffer grouping optimization
Estimated code review effort🎯 2 (Simple) | ⏱️ ~8 minutes Suggested labels
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Review Summary by QodoOptimize job offer matching with hash map lookup
WalkthroughsDescription• Replaced O(N*M) nested loop with O(N) hash map lookup • Optimizes job offer matching to sponsors during data fetching • Reduces time complexity from O(N*M) to O(N+M) • Improves server data parsing performance for getJobOffersForEdition Diagramflowchart LR
A["Fetch offers and sponsors"] --> B["Build hash map by sponsor_id"]
B --> C["O(N) hash map lookup"]
C --> D["Match offers to sponsors"]
D --> E["Improved performance"]
File Changes1. lib/supabase/public-queries.ts
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Code Review by Qodo
Context used✅ Compliance rules (platform):
11 rules 1. Loose Map value type
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Code Review
This pull request optimizes the getJobOffersForEdition function by grouping job offers by sponsor ID using a Map before iterating over sponsors, improving performance from O(N * M) to O(N + M). The reviewer suggested typing the offersBySponsor map with NonNullable<typeof offers> instead of typeof offers to prevent null from being included in the map's value type, ensuring better type safety.
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| const companies: Company[] = []; | ||
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| const offersBySponsor = new Map<string, typeof offers>(); |
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The map offersBySponsor is typed using typeof offers, which includes null (since offers can be null if the query fails or returns no data). Since the map only stores actual arrays of offers and never null, typing it with typeof offers is semantically incorrect and can lead to unnecessary null-safety checks or potential compiler errors under strict null checking if the code is refactored.
Using NonNullable<typeof offers> ensures the map's value type is strictly the array type (e.g., JobOffer[]) without null.
| const offersBySponsor = new Map<string, typeof offers>(); | |
| const offersBySponsor = new Map<string, NonNullable<typeof offers>>(); |
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🧹 Nitpick comments (1)
lib/supabase/public-queries.ts (1)
179-179: ⚡ Quick winMake the Map type more explicit and self-documenting.
Using
typeof offersfor the Map value type is imprecise and not self-documenting. Theoffersvariable includesnullin its type union, but Map values are always non-nullable arrays. This obscures the intent and makes the code harder to understand.As per coding guidelines, code must be self-documenting, and the guideline states to use strict TypeScript.
♻️ Proposed refactor for clearer typing
- const offersBySponsor = new Map<string, typeof offers>(); + const offersBySponsor = new Map<string, Array<NonNullable<typeof offers>[number]>>();Or, better yet, if the offer type can be extracted:
- const offersBySponsor = new Map<string, typeof offers>(); + // Let TypeScript infer from usage, or define explicit type + const offersBySponsor = new Map<string, typeof offers extends Array<infer T> ? T[] : never>();Or simplest, let TypeScript infer the value type from the
.set()calls by omitting the type argument entirely:- const offersBySponsor = new Map<string, typeof offers>(); + const offersBySponsor = new Map<string, Array<Exclude<typeof offers, null>[number]>>();🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@lib/supabase/public-queries.ts` at line 179, The Map declaration uses typeof offers which is vague and includes null; update offersBySponsor to use an explicit, non-nullable array type (or let TypeScript infer it) so values are always Offer[] (or the concrete item type) rather than typeof offers. Locate the offersBySponsor and offers symbols in this file and replace the Map<string, typeof offers> typing with a clear Map<string, Offer[]> (or simply remove the generic to let inference pick it up), and ensure any places that call .set() no longer pass null by adjusting logic where offers can be null.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Nitpick comments:
In `@lib/supabase/public-queries.ts`:
- Line 179: The Map declaration uses typeof offers which is vague and includes
null; update offersBySponsor to use an explicit, non-nullable array type (or let
TypeScript infer it) so values are always Offer[] (or the concrete item type)
rather than typeof offers. Locate the offersBySponsor and offers symbols in this
file and replace the Map<string, typeof offers> typing with a clear Map<string,
Offer[]> (or simply remove the generic to let inference pick it up), and ensure
any places that call .set() no longer pass null by adjusting logic where offers
can be null.
ℹ️ Review info
⚙️ Run configuration
Configuration used: Organization UI
Review profile: CHILL
Plan: Pro
Run ID: 5368d2c5-4254-409d-bd79-5d33764c9cd2
📒 Files selected for processing (1)
lib/supabase/public-queries.ts
1 participant
💡 What: Replaced O(NM) nested loop (array
.filter()inside.forEach()) with O(N) hash map lookup for processing job offers per sponsor.🎯 Why: To prevent the application from slowing down when matching job offers to sponsors during data fetching.
📊 Impact: Improves time complexity of matching offers from O(NM) to O(N+M), reducing memory allocation and improving server data parsing speed.
🔬 Measurement: Observe reduction in data parsing time for
getJobOffersForEdition.PR created automatically by Jules for task 9847621779134285792 started by @anyulled
Summary by CodeRabbit