⚡ Bolt: Optimize yEnc decoding using bytes.translate and find

[xbmc4lyfe]

💡 What: Replaced byte-by-byte iteration in _decode_yenc_lines with bytes.translate() and bytes.find().
🎯 Why: Iterating bytes in python and running loop logic is computationally expensive for large payloads. This is a critical path for verifying yEnc articles.
📊 Impact: Roughly ~6x speedup during raw byte decoding (0.186s -> 0.028s for 1MB of representative yEnc data). Reduces deep verification time significantly.
🔬 Measurement: Run a deep check on any NZB. Alternatively, test suite confirms all logic remains correct.

---

PR created automatically by Jules for task 16507538107195592381 started by @xbmc4lyfe

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

New to Jules? Learn more at jules.google/docs.

---

For security, I will only act on instructions from the user who triggered this task.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 4af4704c-9f46-438d-9226-ff5aac2c76dc

📥 Commits

Reviewing files that changed from the base of the PR and between 09ccc06 and 330ff84.

📒 Files selected for processing (1)

• verify_nzb.py

📜 Recent review details

🔇 Additional comments (2)

verify_nzb.py (2)

118-119: LGTM!

---

120-148: LGTM!

---

📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes

  • Improved yEnc file handling with enhanced error detection for malformed escape sequences.

• Performance

  • Optimized yEnc decoding process for faster file processing.

Walkthrough

The verify_nzb.py module's yEnc decoding logic is refactored from a character-by-character loop to a precomputed table-driven approach. The new implementation uses a _YENC_DECODE_TABLE to translate bytes and employs conditional fast and slow paths based on the presence of yEnc escape sequences, while preserving error validation for incomplete escapes.

Changes

yEnc Decode Table Optimization

Layer / File(s)	Summary
yEnc decode table and table-driven decoder verify_nzb.py	A precomputed _YENC_DECODE_TABLE byte lookup table replaces per-byte decoding. The rewritten _decode_yenc_lines function fast-paths lines without = escape characters via direct table translation and slower-paths lines with = by scanning for escapes and applying yEnc escape decoding rules, preserving the existing dangling-escape error case.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

A rabbit hops through bytes so fast,
With tables built to beat the past,
No more loops slow, now lookups gleam,
The yEnc decoder's swifter dream! 🐇✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: optimizing yEnc decoding with specific techniques (bytes.translate and find).
Description check	✅ Passed	The description is directly related to the changeset, explaining what was replaced, why, and the performance impact of the optimization.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-yenc-decode-opt-16507538107195592381

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch bolt-yenc-decode-opt-16507538107195592381

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}