[perf-scan] 2026-10-01 -- performance opportunities found
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Nobody has claimed this yet.
Assessment
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Newbie friendliness
- 78/100
- Issue type
- Refactor
- Clarity
- Clearly specified
- Activity status
- Active
- Tech stack
- python
- Domain
- cli, performance
Research direction
Start at src/apm_cli/commands/uninstall/engine.py:633-670 and trace the per-package loop reached by apm uninstall. Replace the repeated membership check against packages_to_remove with the proposed companion set of seen dependency identities. Done means the membership check uses the set while packages_to_remove retains its current behavior and ordering.
Written by the indexing model from the issue text.
Description
Performance Scan - 2026-10-01
Automated scan of src/apm_cli/ for algorithmic performance anti-patterns.
1 finding(s) identified (low priority).
Findings
[B] Linear scan inside a loop -- src/apm_cli/commands/uninstall/engine.py:633-670
- Current: O(n*m) --
if matched_dep not in packages_to_removeon a list, inside the per-package loop - Proposed: O(n) with a companion set of seen keys
- Fix: Track a
seenset of matched dependency identities next topackages_to_removeand test membership against it. Low priority: n is the number of CLI args toapm uninstall, so it is small in practice.
Scan coverage
- src/apm_cli/ (486 files scanned)
- Patterns checked: A (quadratic loops), B (linear scan in loop),
C (unconditional expensive ops), D (redundant config parsing),
E (heavy top-level imports), F (sequential independent I/O)
Generated by Daily Performance Scanner · copilot · auto · 20.6 AIC · ⌖ 8.43 AIC · ⊞ 11.1K · ◷
- expires on Oct 8, 2026, 1:48 AM UTC
- Dominant language
- Python
- Stars
- 4k
- Forks
- 387
- Avg merge
- 4d 13h
- Merged PRs (30d)
- 50
Getting set up
- No Dockerfile or Docker Compose file
- Has a pull request template
- Read the contributing guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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