Reduce allocation in AutoFormat #3652
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🧰 Additional context used🧠 Learnings (4)📓 Common learnings📚 Learning: in the `middleware/adaptor/adaptor.go` file of the fiber framework, when updating context handling, ...Applied to files:
📚 Learning: in the fiber framework, `context()` is being renamed to `requestctx()`, and `usercontext()` to `cont...Applied to files:
📚 Learning: in `defaulterrorhandler(c *fiber.ctx, err error)`, since `c` is a pointer to an interface, we need t...Applied to files:
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Summary of Changes
Hello @ReneWerner87, 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 implements a targeted performance optimization by modifying how context references are stored within the DefaultReq and DefaultRes structs. By switching from an interface type (Ctx) to a concrete pointer type (*DefaultCtx), the change aims to reduce memory allocations and eliminate the overhead associated with interface method calls, thereby improving the efficiency of context-related operations.
Highlights
- Performance Optimization: The core change involves updating the
DefaultReqandDefaultResstructs to hold a*DefaultCtxpointer instead of anCtxinterface. This is a direct optimization to reduce allocations and interface dispatch overhead.
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Pull Request Overview
This PR optimizes memory allocation in the AutoFormat functionality by replacing interface references with concrete type pointers. The key optimization reduces interface overhead by allowing direct method calls on the concrete context type instead of going through interface dispatch.
Key changes:
- Replace
Ctxinterface with*DefaultCtxconcrete pointer inDefaultReqandDefaultResstructs - Enable direct method calls on concrete context to avoid interface allocation overhead
Reviewed Changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| res.go | Changes DefaultRes.c field from Ctx interface to *DefaultCtx concrete pointer |
| req.go | Changes DefaultReq.c field from Ctx interface to *DefaultCtx concrete pointer |
| @@ -120,7 +120,7 @@ type ResFmt struct { | |||
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| //go:generate ifacemaker --file res.go --struct DefaultRes --iface Res --pkg fiber --output res_interface_gen.go --not-exported true --iface-comment "Res is an interface for response-related Ctx methods." | |||
| type DefaultRes struct { | |||
| c Ctx | |||
| c *DefaultCtx | |||
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Changing from interface Ctx to concrete type *DefaultCtx creates tight coupling and reduces flexibility. This breaks the dependency inversion principle and makes the code harder to test and extend. Consider if the performance gain justifies losing the ability to use different Ctx implementations.
| c *DefaultCtx | |
| c Ctx |
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| @@ -28,7 +28,7 @@ type RangeSet struct { | |||
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| //go:generate ifacemaker --file req.go --struct DefaultReq --iface Req --pkg fiber --output req_interface_gen.go --not-exported true --iface-comment "Req is an interface for request-related Ctx methods." | |||
| type DefaultReq struct { | |||
| c Ctx | |||
| c *DefaultCtx | |||
There was a problem hiding this comment.
Changing from interface Ctx to concrete type *DefaultCtx creates tight coupling and reduces flexibility. This breaks the dependency inversion principle and makes the code harder to test and extend. Consider if the performance gain justifies losing the ability to use different Ctx implementations.
| c *DefaultCtx | |
| c Ctx |
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #3652 +/- ##
==========================================
- Coverage 91.82% 91.79% -0.03%
==========================================
Files 113 113
Lines 11421 11421
==========================================
- Hits 10487 10484 -3
- Misses 671 673 +2
- Partials 263 264 +1
Flags with carried forward coverage won't be shown. Click here to find out more. ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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⚠️ Performance Alert ⚠️
Possible performance regression was detected for benchmark.
Benchmark result of this commit is worse than the previous benchmark result exceeding threshold 1.50.
| Benchmark suite | Current: 154c087 | Previous: a838dfb | Ratio |
|---|---|---|---|
BenchmarkAppendMsgitem-4_middleware_csrf |
0.6226 ns/op 1606.16 MB/s 0 B/op 0 allocs/op |
0.312 ns/op 3204.99 MB/s 0 B/op 0 allocs/op |
2.00 |
BenchmarkAppendMsgitem-4_middleware_csrf - ns/op |
0.6226 ns/op |
0.312 ns/op |
2.00 |
BenchmarkAppendMsgstorageManager - MB/s |
3210.65 MB/s |
1590.45 MB/s |
2.02 |
This comment was automatically generated by workflow using github-action-benchmark.
Summary
*DefaultCtxpointer inDefaultReqandDefaultResTesting
make testgo test -run=^$ -bench=Benchmark_Ctx_AutoFormat_JSON -benchmem ./...https://chatgpt.com/codex/tasks/task_e_688884e30b488326864546b7b4609d74