Files
Umbraco-CMS/thoughts/shared/handoffs/general/2025-12-13_04-47-12_utf8-to-ascii-converter-analysis.md
yv01p 9962df50ee feat(core): register IContentCrudService in DI container
Adds IContentCrudService registration to UmbracoBuilder alongside
IContentService. Both services are now resolvable from DI.

Includes integration test verifying successful resolution.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
2025-12-21 03:31:23 +00:00

3.6 KiB

date, researcher, git_commit, branch, repository, topic, tags, status, last_updated, last_updated_by, type
date researcher git_commit branch repository topic tags status last_updated last_updated_by type
2025-12-13T04:47:12+00:00 Claude 45edc5916b refactor/Utf8ToAsciiConverter Umbraco-CMS Utf8ToAsciiConverter Refactoring Analysis
analysis
refactoring
strings
simd
performance
complete 2025-12-13 Claude analysis

Handoff: Utf8ToAsciiConverter Refactoring Analysis

Task(s)

Completed:

  1. Cyclomatic complexity comparison between original and refactored implementation
  2. Test count comparison before and after refactoring

Critical References

  • src/Umbraco.Core/Strings/Utf8ToAsciiConverter.cs - New SIMD-optimized implementation
  • src/Umbraco.Core/Strings/Utf8ToAsciiConverterOriginal.cs - Original implementation (disabled with #if false)
  • tests/Umbraco.Tests.UnitTests/Umbraco.Core/Strings/TestData/golden-mappings.json - 1,308 character mappings for regression testing

Recent changes

No code changes made in this session - analysis only.

Learnings

Cyclomatic Complexity Reduction

  • Original: ~287 total complexity (dominated by ~280 in single switch statement with 276 case groups)
  • New: 25 total complexity (distributed across 4 focused methods)
  • Reduction: 91% overall, 97% for maximum method complexity

Architectural Changes

  1. Switch Statement → Dictionary Lookup: 3,400-line switch replaced by FrozenDictionary<char, string> loaded from JSON
  2. Unicode Normalization: ~180 case groups eliminated by using NormalizationForm.FormD for accented Latin characters
  3. SIMD Fast Path: Uses SearchValues<char> for vectorized ASCII detection
  4. Separation of Concerns: Logic split into Convert(), ProcessNonAscii(), TryNormalize()

Test Coverage Added

  • Before: 0 dedicated tests existed
  • After: 2,649 test cases across 4 test files
  • Golden file testing validates all 1,308 character mappings from original implementation

Artifacts

Analysis results documented in conversation - no files created.

Key files analyzed:

  • src/Umbraco.Core/Strings/Utf8ToAsciiConverter.cs:1-209 - New implementation (~210 LOC)
  • src/Umbraco.Core/Strings/Utf8ToAsciiConverterOriginal.cs:1-3633 - Original implementation (~3,600 LOC)
  • tests/Umbraco.Tests.UnitTests/Umbraco.Core/Strings/Utf8ToAsciiConverterTests.cs - 30 test cases
  • tests/Umbraco.Tests.UnitTests/Umbraco.Core/Strings/Utf8ToAsciiConverterGoldenTests.cs - 2,616 test cases
  • tests/Umbraco.Tests.UnitTests/Umbraco.Core/Strings/Utf8ToAsciiConverterInterfaceTests.cs - 2 tests
  • tests/Umbraco.Tests.UnitTests/Umbraco.Core/Strings/Utf8ToAsciiConverterNormalizationCoverageTests.cs - 1 analysis test

Action Items & Next Steps

The refactoring analysis is complete. Potential follow-up:

  1. Review benchmark results in docs/benchmarks/utf8-converter-final-2025-11-27.md
  2. Consider merging branch to main if all tests pass
  3. Document normalization coverage findings from Utf8ToAsciiConverterNormalizationCoverageTests

Other Notes

Key Metrics Summary

Metric Before After Change
Cyclomatic Complexity ~287 25 -91%
Lines of Code ~3,600 ~210 -94%
Switch Cases 276 0 -100%
Test Cases 0 2,649 +2,649

Branch Status

The branch refactor/Utf8ToAsciiConverter contains 16 commits implementing the SIMD-optimized converter with:

  • Interface abstraction (IUtf8ToAsciiConverter)
  • DI integration via ICharacterMappingLoader
  • Static wrapper for backwards compatibility (Utf8ToAsciiConverterStatic)
  • Comprehensive test suite with golden file validation