A collection of performance tests for using window.postMessage in the
next iteration of the l20n.js API.
postAST: Only the raw AST is stored in the parent. The view asks once for the AST and creates entries out of it.
postAllEntries: Entries are created in the parent. The view asks once for all entries and stores them locally.
postEachEntry: Entries are created in the parent. The view asks for each entry individually.
postFormattedEntity: Entries are created in the parent. The view asks for an resolved entity which is formatted in the parent.