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glm-5.1 c9c32a6aa6 decompose reconciler roadmap into 20 implementation tasks across 5 phases

Tasks follow the architecture spec phases:
- Phase 0: key field on UElement (2 tasks + review)
- Phase 1: reactive-host bridge / fiber tree (4 tasks + review)
- Phase 2: key-based children reconciliation (3 tasks + review)
- Phase 3: unmount & dispose support (4 tasks)
- Phase 4: TypeBox value optimizations (4 tasks)

Validated with taskgraph CLI: no cycles, 15 parallel generations,
3 high-risk tasks identified (signal-driven-updates, commit-mutations,
fiber-disposal).

2026-05-18 16:26:52 +00:00

1.7 KiB

Raw Blame History

id, name, status, depends_on, created, modified, scope, risk, impact, level

name

status

depends_on

created

modified

scope

risk

impact

level

value-equal-bailout

Value.Equal bail-out for unchanged subtrees

pending

review-reconciler

2026-05-18T16:22:57.339429429Z

2026-05-18T16:22:57.339429873Z

narrow

low

component

implementation

Description

Add Value.Equal as the first TypeBox optimization layer. When reconciling, if a fiber's cached node is deep-equal to the next node, skip the entire subtree — no prepareUpdate, no commitUpdate, no children reconciliation.

This is the highest-impact optimization according to the architecture doc because it skips entire subtrees. It's also the simplest to implement and has no constraints (unlike Value.Hash which has the global accumulator issue).

The optimization is applied during reconcileProps:

if Value.Equal(fiber.cachedNode, nextNode):
  return  // skip this fiber and all children

Acceptance Criteria

Value.Equal check added before property reconciliation
If fiber's cached node equals next node, skip prepareUpdate and children reconciliation
Cached node stored on fiber (new cachedNode field or reuse props snapshot)
Correctness: behavior is identical with and without the optimization
Existing tests pass
New test: unchanged subtree skips prepareUpdate/commitUpdate
New test: changed prop still triggers prepareUpdate
New test: deeply nested unchanged subtree is fully skipped

References

docs/architecture/reconciler.md — TypeBox Optimization Layer, Value.Equal row
docs/architecture/reconciler.md — Optimization Strategy (step 1)

Notes

To be filled by implementation agent

Summary

To be filled on completion

1.7 KiB Raw Blame History