perf(pm): route installs through scheduler

[elrrrrrrr]

Summary

• Wire fresh/stale install paths through InstallScheduler.
• Remove obsolete install pipeline module.

Review Focus

• Optional dependency behavior, shutdown semantics, and removal of old pipeline paths.

[gemini-code-assist]

Code Review

This pull request replaces the legacy pipeline-based installer with a centralized InstallScheduler architecture. The new system manages download and clone deduplication, implements prefetching via an InstallEventReceiver, and explicitly handles parent-child clone dependencies. Several global caches and the pipeline module have been removed in favor of this scheduler-managed state. Feedback was provided to improve error diagnosability by propagating the specific failure reason from parent packages to their dependent children during the clone process.

[gemini-code-assist]

When a parent package fails to clone, the error message propagated to its children currently only identifies the parent path. Including the actual error that caused the parent to fail would significantly improve diagnosability when reviewing logs for failed installs.

        } else if let Some(children) = self.blocked_by_parent.remove(&target) {
            let parent_err = result.unwrap_err();
            let error = format!("parent package {} failed to clone: {}", target.display(), parent_err);
            for child in children {
                self.complete_clone(child.target, Err(error.clone()));
            }

[github-actions]

📊 pm-bench-phases · 59bbf22 · 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	9.41s	0.17s	10.57s	10.44s	726M	347.1K
utoo-next	8.46s	0.67s	10.63s	12.44s	989M	126.4K
utoo-npm	8.38s	0.23s	10.79s	12.49s	993M	132.9K
utoo	8.46s	0.48s	10.57s	12.46s	1008M	122.0K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	14.9K	18.4K	1.22G	6M	1.91G	1.79G	1M
utoo-next	117.9K	80.7K	1.19G	5M	1.77G	1.77G	2M
utoo-npm	118.9K	83.3K	1.19G	5M	1.77G	1.77G	2M
utoo	118.0K	73.7K	1.19G	5M	1.77G	1.76G	2M

p1_resolve

PM	wall	±σ	user	sys	RSS	pgMinor
bun	1.87s	0.04s	4.03s	1.08s	526M	176.3K
utoo-next	4.59s	3.06s	5.37s	1.70s	617M	90.8K
utoo-npm	3.04s	0.14s	5.53s	2.06s	618M	82.1K
utoo	2.85s	0.05s	5.30s	1.74s	614M	81.1K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	7.8K	4.7K	205M	3M	109M	-	1M
utoo-next	46.8K	69.2K	202M	2M	7M	3M	2M
utoo-npm	71.2K	91.7K	203M	2M	7M	3M	2M
utoo	46.5K	71.1K	202M	2M	7M	3M	2M

p3_cold_install

PM	wall	±σ	user	sys	RSS	pgMinor
bun	6.81s	0.10s	6.38s	10.04s	625M	209.4K
utoo-next	5.93s	0.19s	5.01s	10.96s	448M	63.4K
utoo-npm	6.00s	0.46s	5.12s	10.90s	477M	60.1K
utoo	5.75s	0.20s	5.00s	10.90s	484M	59.4K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	4.7K	6.7K	1.02G	3M	1.82G	1.82G	1M
utoo-next	94.7K	46.5K	1017M	2M	1.76G	1.76G	2M
utoo-npm	95.5K	46.6K	1018M	2M	1.76G	1.76G	2M
utoo	87.0K	55.2K	1018M	3M	1.76G	1.76G	2M

p4_warm_link

PM	wall	±σ	user	sys	RSS	pgMinor
bun	3.33s	0.05s	0.21s	2.35s	135M	32.9K
utoo-next	2.28s	0.13s	0.49s	3.91s	81M	18.7K
utoo-npm	2.32s	0.09s	0.49s	3.88s	80M	19.0K
utoo	2.15s	0.08s	0.44s	3.59s	53M	11.2K

PM	vCtx	iCtx	netRX	netTX	cache	node_mod	lock
bun	282	24	5M	34K	1.98G	1.79G	1M
utoo-next	44.2K	19.5K	20K	24K	1.76G	1.76G	3M
utoo-npm	42.7K	19.2K	20K	7K	1.76G	1.76G	3M
utoo	22.3K	14.2K	20K	9K	1.77G	1.76G	3M

npmmirror.com: no output captured.