Changelog

denoland/std · · 1 commit

YAML parser speeds up mapping writes

A YAML perf tweak replaces slow property definition with direct assignment, while preserving safe handling of `__proto__` and adding regression tests.

tomas-zijdemans

YAML mapping creation gets a faster write path (tomas-zijdemans5ea9159)

The YAML loader now uses direct property assignment for ordinary mapping keys instead of Object.defineProperty, which should reduce overhead in V8 during parse/merge operations. It keeps the slower descriptor-based path only for __proto__ to avoid prototype pollution, preserving the same observable property shape for normal keys.

Other misc changes

  • Added regression tests covering __proto__ handling in parsed mappings and merge keys.