perf(pm): share resolver placement helpers

[elrrrrrrr]

Summary

• extract resolved-dependency graph placement into a shared helper
• extract BFS processed-event emission and dependency-chain error wrapping
• keep the existing preload + BFS resolver behavior unchanged

Validation

• cargo fmt
• cargo check -p utoo-ruborist
• cargo test -p utoo-ruborist resolver::builder::tests::test_build -- --nocapture
• cargo test -p utoo-ruborist resolver::builder::tests::test_resolve_high_level_api -- --nocapture
• cargo clippy --all-targets -- -D warnings --no-deps

Split Plan

Part of the resolver stack split from source PR #3028. This PR isolates placement/event/error helpers so the follow-up demand mainloop PR can focus on scheduling and manifest state instead of graph mutation mechanics.

[gemini-code-assist]

Code Review

This pull request refactors the dependency resolution logic in crates/ruborist/src/resolver/builder.rs by extracting shared logic into modular helper functions. Specifically, it introduces place_resolved_dependency, process_dependency_with_resolved, chain_err, and handle_processed to handle package placement, error chaining, and event reporting. These changes improve code reuse between different resolver paths and simplify the main BFS loop. I have no feedback to provide as no review comments were submitted.

[github-actions]

📊 pm-bench-phases · 2de9179 · linux (ubuntu-latest)

Workflow run — ant-design

PMs: utoo (this branch) · utoo-npm (latest published) · bun (latest)

npmjs.org

p0_full_cold

PM	wall	±σ	user	sys	RSS	pgMinor
bun	9.05s	0.09s	10.46s	9.98s	697M	325.5K
utoo-next	8.07s	0.25s	10.77s	12.11s	1.02G	122.8K
utoo-npm	8.20s	0.01s	11.00s	12.37s	965M	121.9K
utoo	8.50s	0.08s	11.04s	12.07s	1.01G	122.5K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	16.8K	19.3K	1.19G	7M	1.86G	1.75G	1M
utoo-next	113.7K	82.8K	1.16G	5M	1.71G	1.70G	2M
utoo-npm	128.8K	95.2K	1.16G	5M	1.71G	1.70G	2M
utoo	121.0K	69.8K	1.17G	6M	1.71G	1.70G	2M

p1_resolve

PM	wall	±σ	user	sys	RSS	pgMinor
bun	2.21s	0.08s	4.00s	1.16s	513M	186.8K
utoo-next	3.06s	0.12s	5.08s	1.90s	617M	95.6K
utoo-npm	3.09s	0.05s	5.31s	2.22s	613M	81.4K
utoo	3.28s	0.02s	5.68s	2.07s	625M	90.6K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	10.2K	4.3K	202M	3M	107M	-	1M
utoo-next	52.2K	70.4K	200M	3M	7M	3M	2M
utoo-npm	76.5K	92.9K	200M	3M	7M	3M	2M
utoo	60.3K	76.8K	202M	3M	7M	3M	2M

p3_cold_install

PM	wall	±σ	user	sys	RSS	pgMinor
bun	6.78s	0.30s	6.33s	9.74s	596M	204.8K
utoo-next	6.77s	1.56s	5.11s	10.71s	476M	61.3K
utoo-npm	8.71s	2.41s	5.28s	10.82s	542M	64.7K
utoo	5.82s	0.06s	5.11s	10.43s	503M	67.2K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	6.6K	7.1K	1019M	4M	1.76G	1.76G	1M
utoo-next	116.6K	53.6K	990M	3M	1.70G	1.70G	2M
utoo-npm	133.5K	52.4K	990M	4M	1.70G	1.70G	2M
utoo	108.8K	53.1K	990M	3M	1.70G	1.70G	2M

p4_warm_link

PM	wall	±σ	user	sys	RSS	pgMinor
bun	3.45s	0.04s	0.17s	2.53s	134M	31.4K
utoo-next	2.42s	0.18s	0.51s	3.82s	79M	18.2K
utoo-npm	2.34s	0.07s	0.55s	3.82s	80M	18.2K
utoo	2.21s	0.07s	0.51s	3.75s	79M	18.5K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	197	22	21K	16K	1.87G	1.76G	1M
utoo-next	43.0K	19.7K	7K	8K	1.70G	1.70G	2M
utoo-npm	43.0K	20.3K	8K	9K	1.70G	1.70G	2M
utoo	41.9K	19.7K	13K	11K	1.71G	1.70G	2M

npmmirror.com: no output captured.