Summary

• Avoid retaining decoded snapshot values/states for lazy containers during read-only traversal.
• Route Map/List/MovableList handler reads through no-retain read helpers used by toJSON and loro-mirror style reads.
• Keep root discovery lazy and avoid repeated root KV scans.
• Include compact internal representation work for container store, list/map state, and richtext snapshot loading.

Measurements

Using the 32 MB fixture probe after exporting/importing a snapshot:

• toJSON() then dropping JSON: 41.81 MB -> 25.58 MB
• mirror shallow read: 41.81 MB -> 25.58 MB
• mirror schema root read: 43.79 MB -> 25.58 MB
• after a few inserts on the snapshot doc: 30.34 MB

Tradeoff: repeated full read-only traversals decode again instead of reusing retained decoded values. Current release probe timings were roughly toJSON 72 ms, mirror shallow 79/59 ms, and mirror schema root 143/131 ms.

Validation

• cargo check -p loro-internal
• cargo test -p loro-internal handler --lib
• cargo test -p loro-internal map --lib
• cargo test -p loro-internal list --lib
• cargo test -p loro-internal snapshot --lib
• cargo test -p loro-internal richtext --lib
• git diff --check