[1] flatbuffers/rust/flexbuffers at master · google/flatbuffers · GitHub, https://github.com/google/flatbuffers/tree/master/rust/flexbuffers
Flexbuffers is a schema-less binary format developed at Google. FlexBuffers can be accessed without parsing, copying, or allocation. This is a huge win for efficiency, memory friendly-ness, and allows for unique use cases such as mmap-ing large amounts of free-form data.
Flexbuffers is the schema-less cousin of Flatbuffers.
[2] FlatBuffers: FlexBuffers, , https://google.github.io/flatbuffers/flexbuffers.html