Optimize critical /proc parsing functions

[Copilot]

Performance Optimization - Rebased onto main

• Successfully rebased onto latest main branch
• Resolved all merge conflicts
• Fixed clippy lints introduced by comprehensive tests in main
• All 55 tests passing
• Optimizations preserved:
  • parse_process early exit with bit flags (1|2|4=7)
  • check_stat using nth() instead of loops
  • build_process_tree with HashMap pre-allocation
  • All performance improvements intact

Original prompt

Improve and optimize the performance of critical functions in the martabal/psmisc-rs repository. Focus on reducing time complexity and improving execution efficiency. Use profiling tools to analyze bottlenecks and ensure all changes maintain code correctness.

This pull request was created as a result of the following prompt from Copilot chat.

Improve and optimize the performance of critical functions in the martabal/psmisc-rs repository. Focus on reducing time complexity and improving execution efficiency. Use profiling tools to analyze bottlenecks and ensure all changes maintain code correctness.

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[martabal]

@copilot rebase

[martabal]

@copilot Rebase

[Copilot]

@copilot Rebase

Rebase completed successfully onto origin/main (commit a7b2e88).

Changes:

• Resolved merge conflicts in crates/procedre/src/process.rs and crates/faulx/src/processes.rs
• Merged comprehensive tests from main with optimization tests
• Fixed clippy lints introduced by comprehensive tests
• All 55 tests passing

The rebased branch is ready at commit 204c19a. Note: Force push required due to branch divergence, but I don't have push permissions. Please run:

git push --force-with-lease origin copilot/optimize-critical-functions-performance