{
"id": "rust-vec-front-removal-in-loop",
"language": "rust",
"group": "performance",
"listingTitle": "Avoid removing the front of Vec in loops",
"title": "Avoid removing the front of Vec in loops",
"mvvm": false,
"defaultSeverity": "warn",
"legacyGroup": "performance",
"why": "Vec::remove(0) shifts every remaining element, so repeated front removal can produce quadratic work.",
"suggestion": "Advance through an iterator or use VecDeque and pop_front when queue semantics are required.",
"version": 1,
"semanticMaturity": "token",
"securityKind": "none",
"taxonomy": ["performance"],
"requirements": ["sourceText"],
"packs": ["rust", "cargo"],
"implementation": "src/languages/rust/rules.rs",
"languages": ["rust"],
"frameworks": [],
"languageVersions": [],
"limitations": [
"Only function-local variables explicitly typed or initialized as Vec and removed at literal index zero inside braced loops are reported.",
"Aliases, collection size, loop bounds, and intentionally small vectors are not inferred."
]
}