163-java-profiling-refactor

# Java Profiling Workflow / Step 3 / Refactor code to fix issues Implement refactoring based on profiling analysis: review profiling-problem-analysis-YYYYMMDD.md and profiling-solutions-YYYYMMDD.md, identify specific performance bottlenecks, and refactor code to fix them. Ensure all tests pass after changes. **What is covered in this Skill?** - Review analysis notes: docs/profiling-problem-analysis-YYYYMMDD.md, docs/profiling-solutions-YYYYMMDD.md - Identify specific bottlenecks from the documented findings - Refactor code to address CPU hotspots, memory leaks, threading issues, or other performance problems - Run verification: ./mvnw clean verify or mvn clean verify **Scope:** Changes must pass all tests. Apply fixes incrementally and verify after each significant change. ## Constraints Verify that changes pass all tests before considering the refactoring complete. - **MANDATORY**: Run `./mvnw clean verify` or `mvn clean verify` after applying refactoring - **SAFETY**: If tests fail, fix issues before proceeding - **BEFORE APPLYING**: Read the analysis and solutions documents for specific recommendations - **EDGE CASE**: If request scope is ambiguous, stop and ask a clarifying question before applying changes - **EDGE CASE**: If required inputs, files, or tooling are missing, report what is missing and ask whether to proceed with setup guidance ## When to use this skill - Refactor the code with profiling - Apply profiling - Refactor the code with profiling - Optimize hot path - Performance refactoring ## Workflow 1. **Review profiling analysis artifacts** Read `docs/profiling-problem-analysis-YYYYMMDD.md` and `docs/profiling-solutions-YYYYMMDD.md` to select target bottlenecks. 2. **Apply targeted performance refactors** Implement focused code changes for documented CPU, memory, or threading hotspots, incrementally and safely. 3. **Verify behavior and performance build integrity** Run `./mvnw clean verify` or `mvn clean verify`; if tests fail, fix issues before continuing. 4. **Prepare handoff for verification phase** Summarize implemented changes and expected metric improvements for Step 4 comparison. ## Reference For detailed guidance, examples, and constraints, see [references/163-java-profiling-refactor.md](references/163-java-profiling-refactor.md).