Refactor `lib/parse.js` to cache expressions
Refactor `lib/parse.js` to cache expressions

chcokr/mdast,ulrikaugustsson/mdast,yukkurisinai/mdast,yukkurisinai/mdast,eush77/remark,eush77/remark,tanzania82/remarks,chcokr/mdast,wooorm/remark,ulrikaugustsson/mdast