perf(core): add document-level and block-level caching to pm→markdown serialization#1047
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perf(core): add document-level and block-level caching to pm→markdown serialization#1047
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Repeated serialize() calls with the same document node and equivalent options now return the cached result without re-serialization. Options are compared by reference first, then field-by-field (with RegExp support via source+flags).
When the document changes, only modified top-level blocks are re-serialized. Unchanged blocks (same node reference) reuse their cached output. Cache validity also accounts for the preceding block type, which affects inter-block separators (e.g. triple newline between consecutive lists of the same type).
makhnatkin
approved these changes
Apr 8, 2026
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Summary
Two-level caching in
MarkdownSerializer:serialize()is called with the samedocnode and equivalentoptions, returns the cached result without re-serializationWeakMapcacheOptions are compared using a hybrid approach: reference equality first (
===), then field-by-field with RegExp support.