Stream-json: FlexAssembler String/RegExp Path Filters Join The Full Key Stack Per Container Start, Giving O(depth^2) CPU

Summary "FlexAssembler", the custom-container assembler shipped in the "stream-json" package "src/core/utils/flex-assembler.js", re-exported at "stream-json/utils/flex-assembler.js" and "stream-json/web/utils/flex-assembler.js", compiles a string or RegExp path "filter" into a matcher that runs...