feat: [performance improvement] Replace Object.entries().find() with direct O(1) property access#272
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Refactored `getEditionNavigation` in `lib/shared/navigation.ts` to use direct object lookups (`cfpData[year]` and `conditions[link.condition]`) instead of creating intermediate arrays via `Object.entries()` and performing a linear search via `.find()`. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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Code Review
This pull request optimizes code by replacing inefficient Object.entries().find() lookups with direct property access in lib/shared/navigation.ts and updates the documentation in .jules/bolt.md to reflect this best practice. The reviewer provided suggestions to further simplify the property access by removing redundant type assertions and unnecessary ternary checks.
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| const hasSchedule = schedule.length > 0; | ||
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| const editionCfp = Object.entries(cfpData).find(([y]) => y === year)?.[1]; | ||
| const editionCfp = cfpData[year as keyof typeof cfpData]; |
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Since cfpData is typed as Record<string, CfpTrack[]> and year is a string, you can access the property directly as cfpData[year] without the redundant type assertion as keyof typeof cfpData.
| const editionCfp = cfpData[year as keyof typeof cfpData]; | |
| const editionCfp = cfpData[year]; |
| .filter((link) => { | ||
| if (!link.condition) return true; | ||
| const conditionValue = Object.entries(conditions).find(([key]) => key === link.condition)?.[1]; | ||
| const conditionValue = link.condition ? conditions[link.condition as keyof typeof conditions] : true; |
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The ternary check link.condition ? ... : true is redundant here because line 41 already guards against a missing link.condition (if (!link.condition) return true;). Additionally, since conditions is typed as Record<NavCondition, boolean> and link.condition is of type NavCondition, the type assertion as keyof typeof conditions is unnecessary. You can simplify this to a direct property access.
| const conditionValue = link.condition ? conditions[link.condition as keyof typeof conditions] : true; | |
| const conditionValue = conditions[link.condition]; |
Refactored `getEditionNavigation` in `lib/shared/navigation.ts` to use direct object lookups (`cfpData[year]` and `conditions[link.condition]`) instead of creating intermediate arrays via `Object.entries()` and performing a linear search via `.find()`. Also fixed formatting in `.jules/bolt.md`. Co-authored-by: google-labs-jules[bot] <161369871+google-labs-jules[bot]@users.noreply.github.com>
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💡 What: Replaced two instances of
Object.entries(obj).find(([k]) => k === key)?.[1]with directobj[key]access inlib/shared/navigation.ts.🎯 Why:
Object.entriescreates an array of tuples in memory and.findperforms an O(N) linear search. Direct property access is O(1) and eliminates the intermediate memory allocations, which is especially beneficial in frequently-called functions likegetEditionNavigation.📊 Impact: Reduces garbage collection overhead and drops the time complexity of these lookups from O(N) to O(1).
🔬 Measurement: Verify tests pass via
npm run testand check that the site navigation functions exactly as it did before. Build performance (which statically generates many pages using this function) is marginally improved.PR created automatically by Jules for task 3221419730122370004 started by @anyulled