Revision history for Data-HashMap

0.02  2026-03-12
    - Lookup optimizations: cached stash pointer comparison in EXTRACT_MAP
    - Switch to bundled xxHash v0.8.3 (XXH3_64bits) for all key hashing
    - Add get_direct keyword for zero-copy string-value lookups (IS, SS, I32S, I16S)
    - OOM-safe TTL lazy allocation across all put/get_or_set paths
    - LRU uint32_t index overflow guard in rehash
    - HM_LIKELY/HM_UNLIKELY portability guard for non-GCC/Clang compilers
    - Null-value guard in get_or_set for string-value variants
    - each() iterator reset documentation covers remove/compaction triggers
    - iter_reset keyword for manual each() iterator reset

0.01  2026-03-07
    - Initial release
    - 14 type-specialized hash map variants: I16, I16A, I16S, I32, I32A, I32S, IA, II, IS, SA, SI16, SI32, SI, SS
    - Keyword API via XS::Parse::Keyword (bypasses method dispatch)
    - Method dispatch API ($map->put, $map->get, etc.)
    - Counter operations (incr, decr, incr_by) for integer-value variants
    - LRU eviction (max_size) and TTL expiry (default_ttl)
    - Per-key TTL via put_ttl keyword/method
    - clear, to_hash, get_or_set operations
    - Open addressing with linear probing, xxHash, tombstone compaction
