Issues

• YAML emitter writes a string with a C0 control character as a plain scalar, which strict YAML parsers reject

  Hyperfoil/jjq#163 · Filter by author Sanne-ai-bot opened on Oct 19, 2026

• writeUTF8 getChars tradeoff: clean cost vs pollution immunity

  investigationperformance
  Hyperfoil/jjq#162 · Filter by author stalep opened on Oct 19, 2026

• JSON: resume block scanning after string escapes

  investigationparserperformance
  Hyperfoil/jjq#161 · Filter by author stalep opened on Oct 19, 2026

• UTF-8: investigate resuming ASCII block scanning after Unicode

  investigationparserperformance
  Hyperfoil/jjq#160 · Filter by author stalep opened on Oct 19, 2026
  1

• Serialization: benchmark public-API getChars against charAt

  investigationjava-platformperformance
  Hyperfoil/jjq#157 · Filter by author stalep opened on Oct 19, 2026
  3

• YAML: remove redundant Reader copies from String entry points

  optimizationperformance
  Hyperfoil/jjq#158 · Filter by author stalep opened on Oct 19, 2026
  1

• Expand string benchmarks for Unicode profiles and deferred/eager paths

  benchmarkinvestigationperformance
  Hyperfoil/jjq#156 · Filter by author stalep opened on Oct 19, 2026

• Slow small number-heavy docs: BigDecimal fallback + small-int residual

  Hyperfoil/jjq#149 · Filter by author stalep opened on Oct 15, 2026
  1

• YAML parse follow-ups: Builder dup-check on giant maps, withSourceText tax, unprofiled emitter

  Hyperfoil/jjq#143 · Filter by author stalep opened on Oct 13, 2026

• Positional spans on JqValue nodes (line/column for all sources)

  Hyperfoil/jjq#130 · Filter by author stalep opened on Oct 11, 2026
  1

• Optimize YAML scalar source-text divergence check (render-compare costs ~10% on number-heavy docs)

  Hyperfoil/jjq#129 · Filter by author stalep opened on Oct 11, 2026

• JsonpathToJq conformance gaps: remaining 458 skipped tests

  enhancement
  Hyperfoil/jjq#73 · Filter by author stalep opened on Sep 4, 2026
  1

• jjq-quarkus extension: build-time integration for mapper and Jakarta providers

  enhancement
  Hyperfoil/jjq#65 · Filter by author stalep opened on Aug 28, 2026

• Investigate x86_64 register spilling in generated mappings for large records

  enhancementinvestigation
  Hyperfoil/jjq#64 · Filter by author stalep opened on Aug 28, 2026
  2

• Separate hot and cold fields in JqObject for better cache-line utilization

  enhancementinvestigationperformance
  Hyperfoil/jjq#58 · Filter by author stalep opened on Aug 11, 2026
  1

• Prepare for Project Valhalla value classes (JDK 28+)

  enhancementperformance
  Hyperfoil/jjq#54 · Filter by author stalep opened on Aug 5, 2026

• Investigate columnar (structure-of-arrays) representation for arrays of uniform JqObjects

  enhancementinvestigationperformance
  Hyperfoil/jjq#49 · Filter by author stalep opened on Jul 24, 2026
  1

• Extract jjq-value module compilable at Java 17 for broader ecosystem compatibility

  Hyperfoil/jjq#46 · Filter by author stalep opened on Jul 17, 2026
  1

• Compile more expression types to bytecode (reduce evaluator fallback)

  architectureenhancementperformance
  Hyperfoil/jjq#23 · Filter by author stalep opened on Jun 23, 2026