refactor(queue): drop indexmap, group_by_scope returns a Vec<(K, V)>#1445
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`group_by_scope` in `queue status` returned `IndexMap<String, Vec<&Batch>>` because the human renderer needs first-seen insertion order (mirrors Python dict iteration). That's one hashmap-shaped use of the only `IndexMap` in the codebase — and the typical input size is 1–3 scopes per repo. At that N, the hashing/bucketing overhead of `IndexMap` is dead weight versus a `Vec<(K, V)>` with a linear `iter_mut().find()` on insert. Same wire shape from the caller's side (still iterable by `(scope, batches)`), one fewer crate in `Cargo.lock`. `indexmap` survives transitively (it's an internal dep of `jsonschema`), so the lockfile loses one direct line but keeps the package — that's fine, the goal here is to shed a *direct* dependency we control, not to fight upstream graphs. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com> Change-Id: I7085cf297a6a294217b0a6656a4bc224a1dd2c58
This was referenced May 19, 2026
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This was referenced May 19, 2026
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group_by_scopeinqueue statusreturnedIndexMap<String, Vec<&Batch>>because the human renderer needs first-seeninsertion order (mirrors Python dict iteration). That's one
hashmap-shaped use of the only
IndexMapin the codebase — andthe typical input size is 1–3 scopes per repo.
At that N, the hashing/bucketing overhead of
IndexMapis deadweight versus a
Vec<(K, V)>with a lineariter_mut().find()on insert. Same wire shape from the caller's side (still iterable
by
(scope, batches)), one fewer crate inCargo.lock.indexmapsurvives transitively (it's an internal dep ofjsonschema), so the lockfile loses one direct line but keeps thepackage — that's fine, the goal here is to shed a direct
dependency we control, not to fight upstream graphs.
Co-Authored-By: Claude Opus 4.7 noreply@anthropic.com
Depends-On: #1444