[in-progress] perf: continue SERDE hot-path optimizations - #358
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- reuse Builder and Parser instances within Json::Codec - cache list/map member shape lookups in builder and parser hot paths - simplify jsonName memoization in Json::Extension - return nil for top-level JSON null payloads and cover it in parser specs
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Closing in favor of the stack prs. |
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Summary
This PR continues the post-schema-extension serde follow-up work.
It tightens hot paths across the JSON/XML serde stack, reduces repeated lookup/object churn in builders and parsers, and keeps protocol-specific behavior aligned with schema metadata.
Changes
:defaultNotes
This is intentionally incremental follow-up work, not a new serde design phase. The goal is to keep the changes narrow while continuing to improve runtime behavior and cleanup after the schema-extension work.
Validation
bundle exec rake smithy-client:spec