🧹 chore: Use sync.Pool for redirect old input map #3971
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Summary of ChangesHello @gaby, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request optimizes the handling of input maps used during redirects by introducing a Highlights
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Note Other AI code review bot(s) detectedCodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review. WalkthroughReplaced inline allocation of an old-input map with a pooled Changes
Sequence Diagram(s)(Skipped — changes are internal pooling plus a unit test; no new multi-component control flow to visualize.) Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Suggested reviewers
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gaby
changed the title
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Additional details and impacted files@@ Coverage Diff @@
## main #3971 +/- ##
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- Coverage 91.59% 91.58% -0.01%
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Files 119 119
Lines 10194 10208 +14
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+ Hits 9337 9349 +12
- Misses 543 544 +1
- Partials 314 315 +1
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Pull request overview
This PR introduces performance optimization and data safety improvements for redirect input handling by implementing a sync.Pool for input maps. The changes prevent potential data leakage between redirect operations while reducing memory allocations through map reuse.
- Adds
oldInputPoolsync.Pool to manage temporary input maps - Implements acquire/release functions with proper map clearing using
clear() - Updates
WithInput()to use pooled maps instead of creating new ones
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
| redirect.go | Implements sync.Pool for input maps with acquire/release functions and updates WithInput() to use pooled resources |
| redirect_test.go | Adds test case to verify pooled maps are properly cleared between reuses |
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Code Review
This pull request introduces a sync.Pool for input maps used in redirects to reduce allocations, which is a good performance optimization. The implementation correctly acquires maps from the pool and clears them before reuse. A new test case is added to verify that maps are properly cleared between uses. My main feedback is to consider preventing very large maps from being returned to the pool to avoid potential memory retention issues.
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Actionable comments posted: 0
🧹 Nitpick comments (1)
redirect.go (1)
107-116: Consider removing redundant clear() on acquire.Since
releaseOldInput()already clears the map at line 119 before returning it to the pool, theclear()call at line 113 is redundant. You only need to clear in one location—either on acquire or on release, not both.🔎 Proposed refactor
func acquireOldInput() map[string]string { oldInput, ok := oldInputPool.Get().(map[string]string) if !ok { return make(map[string]string) } - - clear(oldInput) return oldInput }
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📒 Files selected for processing (2)
redirect.goredirect_test.go
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📓 Path-based instructions (2)
**/*_test.go
📄 CodeRabbit inference engine (AGENTS.md)
When adding Go tests, always invoke
t.Parallel()at the start of each test and subtest to maximize concurrency
Files:
redirect_test.go
**/*.go
📄 CodeRabbit inference engine (AGENTS.md)
Prefer
github.com/gofiber/utils/v2helpers (for example,utils.Trim) when performing common operations such as string manipulation, whenever it is practical and appropriate for the surrounding code
Files:
redirect_test.goredirect.go
🧬 Code graph analysis (2)
redirect_test.go (2)
ctx.go (5)
DefaultCtx(53-75)DefaultCtx(141-143)DefaultCtx(153-155)DefaultCtx(161-163)DefaultCtx(456-458)redirect.go (1)
Redirect(68-72)
redirect.go (1)
constants.go (1)
StatusSeeOther(66-66)
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🔇 Additional comments (4)
redirect.go (3)
17-31: LGTM: Clean pool setup.The
oldInputPoolis properly structured alongside the existingredirectPool, with a straightforwardNewfunction that creates fresh map instances. This follows Go pooling best practices.
118-121: LGTM: Proper cleanup before pooling.The map is correctly cleared before being returned to the pool, preventing data leakage between reuses.
165-190: LGTM: Correct pooling pattern in WithInput().The implementation properly acquires the map from the pool, uses
deferto ensure it's released even if a panic occurs, and correctly binds request data before copying it tor.messages. The temporary map is efficiently reused via pooling.redirect_test.go (1)
398-416: LGTM: Test correctly validates map reuse and clearing.This test effectively verifies that the
oldInputPoolproperly clears maps between reuses. By callingWithInput()twice with different query parameters and asserting that only the second parameter appears, it confirms that stale data from the first call does not leak into subsequent invocations. The test properly invokest.Parallel()as required by the coding guidelines.
Addressing nitpick comment |
Summary
WithInputto draw from the pool, collect request data, and return cleared mapsRelated #3767