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⚡ Bolt: optimize format reports by eliminating redundant String allocations#1

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badMade merged 3 commits into
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jules-10108857645099812862-908b6718
Apr 20, 2026
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⚡ Bolt: optimize format reports by eliminating redundant String allocations#1
badMade merged 3 commits into
mainfrom
jules-10108857645099812862-908b6718

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@badMade badMade commented Apr 9, 2026

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💡 What: Replaced String cloning with &str borrowing in agent_detail and render_skills_report when pushing string parts to a Vec for join().

🎯 Why: To reduce unnecessary heap allocations caused by calling .clone() and .to_string() on string components that were just going to be immediately concatenated into a final string.

📊 Impact: Reduces intermediate heap allocations for every agent and skill rendered in CLI reports, speeding up output rendering and lowering memory usage profile during those actions.

🔬 Measurement: Verifiable by the lack of regressions in rendering tests and through system memory profiling or benchmark micro-measurements on formatting large numbers of agents/skills.


PR created automatically by Jules for task 10108857645099812862 started by @badMade

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Pull request overview

Optimizes CLI report formatting by reducing intermediate heap allocations when composing agent and skill detail strings.

Changes:

  • Switched agent_detail to build Vec<&str> via .as_str() instead of cloning Strings before join().
  • Switched skills report formatting to use borrowed &str parts (including removing to_string() for &'static str origin labels).
  • Added a short Jules “bolt” note documenting the optimization pattern.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File Description
rust/crates/commands/src/lib.rs Eliminates redundant String allocations by joining borrowed &str parts for agent/skill report lines.
.jules/bolt.md Documents the Vec<&str> + join() pattern to avoid unnecessary cloning in Rust formatting code.

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Code Review

This pull request introduces a new documentation entry in .jules/bolt.md explaining a Rust string cloning optimization. The optimization involves using Vec<&str> with borrowed string slices instead of Vec<String> with cloned strings to avoid unnecessary heap allocations when constructing strings from parts. This optimization is then applied in the agent_detail and render_skills_report functions within rust/crates/commands/src/lib.rs, replacing clone() and to_string() calls with as_str() or direct &str usage. The review comments suggest further refactoring in both agent_detail and render_skills_report functions to use an iterator-based approach with Option<&str> and flatten() for more concise, idiomatic, and potentially more efficient code.

Comment thread rust/crates/commands/src/lib.rs Outdated
Comment thread rust/crates/commands/src/lib.rs Outdated
@badMade badMade merged commit f647f50 into main Apr 20, 2026
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@badMade badMade deleted the jules-10108857645099812862-908b6718 branch April 20, 2026 01:30
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5 participants