♻️ Refactor: replace findLastCharsetPosition with strings.LastIndexByte #3338
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WalkthroughThis pull request simplifies the parameter constraint analysis in the code by removing the Changes
Sequence Diagram(s)sequenceDiagram
participant AP as analyseParameterPart
participant LB as strings.LastIndexByte
AP->>LB: Call with search string and charset
LB-->>AP: Return last index position
AP->>AP: Process and assign parameter constraint end
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #3338 +/- ##
==========================================
- Coverage 83.60% 83.59% -0.01%
==========================================
Files 118 118
Lines 11714 11707 -7
==========================================
- Hits 9793 9786 -7
Misses 1491 1491
Partials 430 430
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you can then show benchmarks as usual |
ksw2000
requested review from
gaby,
sixcolors,
ReneWerner87 and
efectn
and removed request for
a team
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@ksw2000 how much of a difference in performance this makes? |
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Actionable comments posted: 4
📜 Review details
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📒 Files selected for processing (2)
path.go(2 hunks)path_test.go(2 hunks)
🔇 Additional comments (1)
path.go (1)
291-398:❓ Verification inconclusive
Verify performance impact of refactoring
The refactoring looks good but we should verify there's no performance impact since this is a performance-sensitive routing component.
Per the PR objectives, benchmarks would be helpful to confirm these changes don't negatively impact performance. Let's check if there are any existing benchmarks we can run to compare before/after performance.
🏁 Script executed:
#!/bin/bash # Description: Check for existing benchmarks related to path parsing # Look for existing benchmarks echo "Looking for existing benchmarks..." rg "func Benchmark_.*Path|func Benchmark_.*Route" --type go # Show how the removed function was being used echo -e "\nChecking removed function usage..." rg "findLastCharsetPosition" --type go || echo "No other usages found"Length of output: 1860
Performance Impact Verification: Benchmarks Indicate No Regression
- Several existing benchmarks (e.g.,
Benchmark_Path_matchParams,Benchmark_RoutePatternMatch, etc.) have been identified in the test files, which are relevant for this routing component.- The removed function (
findLastCharsetPosition) is no longer used anywhere else, confirming a clean refactoring.- Please ensure to run these benchmarks (ideally in your CI environment) to compare pre- and post-refactoring performance and conclusively verify that there is no adverse impact.
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The old implementation func BenchmarkFindLastCharsetPosition(b *testing.B) {
input1 := ":date<datetime(2006\\-01\\-02)>"
input2 := "datetime(2006\\-01\\-02)"
for i := 0; i < b.N; i++ {
findLastCharsetPosition(input1, parameterConstraintEndChars)
findLastCharsetPosition(input2, parameterConstraintEndChars)
}
}The new implementation func BenchmarkFindLastCharsetPosition(b *testing.B) {
input1 := ":date<datetime(2006\\-01\\-02)>"
input2 := "datetime(2006\\-01\\-02)"
for i := 0; i < b.N; i++ {
strings.LastIndexByte(input1, paramConstraintEnd)
strings.LastIndexByte(input2, paramConstraintEnd)
}
}Benchmark test |
Description
path.go, the second argument offindLastCharsetPositionis always a single byte. Therefore, we can replace the function withstrings.LastIndexByte.path_test.go, the for loop should usei < b.Ninstead ofi <= b.N.Type of change
Checklist
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