* Reduce marshal and unmarshal overhead
Targeted optimizations to reduce performance overhead introduced by
recent feature additions and the unsafe removal.
Unmarshal:
- parseKeyval: access the node directly in the builder's slice to set
Raw, bypassing NodeAt which triggers a GC write barrier for the
nodes-pointer on every key-value expression.
- Iterator.Next: cache the *nodes slice dereference in a local variable
to avoid repeated pointer-to-slice indirection in the hot loop.
Marshal:
- Guard shouldOmitZero calls with an inlineable options.omitzero check.
shouldOmitZero has inlining cost 1145 (budget 80), so avoiding the
function call when omitzero is not set removes per-field overhead.
- Inline the isNil check in encodeMap. isNil has inlining cost 93
(budget 80), so expanding it at the single hot call site avoids
per-map-entry function call overhead.
Update README benchmarks.
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Thomas Pelletier
f36a3ece9e