⚡ Bolt: Fast Git output parsing

[AhmmedSamier]

💡 What: Replaced .split('\n'), .trim(), and path.normalize(path.join()) with a manual .charCodeAt loop traversing the string directly in addFilesToSet.
🎯 Why: In repositories with lots of modifications, reading lines separated by newlines generated huge numbers of intermediate string slices, large array allocations, and regex/path processing overhead.
📊 Impact: Expected to reduce execution time for large git status outputs by ~3.3x (e.g. 5.2s -> 1.5s for 50k files).
🔬 Measurement: Verified with a custom benchmark matching the old implementation vs the new loop. Passed bun test and bun run lint.

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PR created automatically by Jules for task 18064193942758331123 started by @AhmmedSamier

Summary by CodeRabbit

• Chores

  • Improved parsing efficiency for git operations, reducing memory allocations and enhancing performance.

• Documentation

  • Updated internal development documentation with optimized string parsing techniques.

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[coderabbitai]

📝 Walkthrough

Walkthrough

The changes optimize string parsing performance by replacing .split('\n') and .trim() operations with a single-pass character-level loop using indexOf and charCodeAt. Documentation is updated to describe this parsing optimization technique.

Changes

Cohort / File(s)	Summary
Documentation .jules/bolt.md	Added entry for 2024-05-27 documenting a faster multi-line string parsing approach using indexOf and charCodeAt instead of split()/trim() to reduce allocations.
Git Provider Optimization language-server/src/core/git-provider.ts	Refactored addFilesToSet to parse output via single-pass loop with manual whitespace boundary detection; builds normalized file paths with platform-specific handling (Windows forward-slash conversion and lowercasing).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

Suggested labels

codex

Poem

🐰 A loop so lean, no splits in sight,
Through charCodes we parse the strings so tight,
One pass, one goal, no waste, no fray—
Performance blooms in the Jules way! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly relates to the main change: optimizing Git output parsing performance by replacing string splitting/trimming operations with a faster manual parsing loop.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ 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-fast-git-parsing-18064193942758331123

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[coderabbitai]

🧹 Nitpick comments (1)

language-server/src/core/git-provider.ts (1)

66-70: Minor: Root normalization assumes native path separators.

The root normalization checks for both / and \ as trailing characters but only appends path.sep. If root contains mixed separators (e.g., C:/repo on Windows), the concatenation would produce C:/repo\src/file.ts before the regex replacement, which then becomes C:/repo\src\file.ts — still mixed.

Since workspace roots typically come from VS Code APIs with native separators, this is likely fine in practice.

♻️ Optional: Normalize root separators on Windows

         let normalizedRoot = root;
+        if (this.isWindows) {
+            normalizedRoot = normalizedRoot.replace(/\//g, '\\');
+        }
         const rootLastChar = root.charCodeAt(root.length - 1);

Then update line 68 to use normalizedRoot:

-        const rootLastChar = root.charCodeAt(root.length - 1);
+        const rootLastChar = normalizedRoot.charCodeAt(normalizedRoot.length - 1);

🤖 Prompt for AI Agents

Verify each finding against the current code and only fix it if needed.

In `@language-server/src/core/git-provider.ts` around lines 66 - 70, The code
appends path.sep only after checking for '/' or '\' which can leave mixed
separators; fix by normalizing all separators in the incoming root to the
platform separator first (e.g., replace all '/' and '\' with path.sep) and then
perform the trailing-separator check/append; update usage so the rest of the
function uses normalizedRoot (the variable already declared) instead of the
original root so paths are consistently platform-normalized (referencing
normalizedRoot, rootLastChar, and path.sep).

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Nitpick comments:
In `@language-server/src/core/git-provider.ts`:
- Around line 66-70: The code appends path.sep only after checking for '/' or
'\' which can leave mixed separators; fix by normalizing all separators in the
incoming root to the platform separator first (e.g., replace all '/' and '\'
with path.sep) and then perform the trailing-separator check/append; update
usage so the rest of the function uses normalizedRoot (the variable already
declared) instead of the original root so paths are consistently
platform-normalized (referencing normalizedRoot, rootLastChar, and path.sep).

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 250d7f1e-5900-4237-b970-96c08d158604

📥 Commits

Reviewing files that changed from the base of the PR and between b2c343b and 6edf35e.

📒 Files selected for processing (2)

• .jules/bolt.md
• language-server/src/core/git-provider.ts