perf: result path memory allocation optimizations (mostly memory savings, 10's of ns improvements)#805

Draft

mykaul wants to merge 11 commits into

scylladb:masterfrom

mykaul:perf/result-path-cleanup

Commits on Jun 29, 2026

perf: remove dead and duplicate class attributes in ResultMessage
mykaul
committed
perf: skip redundant None attribute assignments in decode_message
mykaul
committed
perf: avoid throwaway ResultSet creation in fetch_next_page
mykaul
committed
perf: add __slots__ to _MessageType, ResultMessage, and FastResultMessage
mykaul
committed
perf: streamline tablet payload parsing in _set_result
mykaul
committed
perf: check isinstance(ResultMessage) first in _set_result for direct attr access
mykaul
committed
perf: cache column_names/column_types on PreparedStatement to avoid per-result list comprehensions
mykaul
committed
perf: reorder RESULT_KIND dispatch and replace getattr with direct access
mykaul
committed
perf: cache session.cluster as local in _set_result to avoid repeated double-lookup
mykaul
committed
perf: add __repr__ to ResultMessage for slotted attribute display
mykaul
committed
fix: pre-existing bug in _set_keyspace_for_all_pools and add scope validation to wait_for_schema_agreement
mykaul
committed