GitHub - corinis/msgpack-javascript: MessagePack serializer implementation for JavaScript / msgpack.org[JavaScript]

MessagePack with key extension

Space-efficient binary serialization format.

This includes an extension to remove xtra space for duplicate keys:

format name	first byte (in binary)	first byte (in hex)
fixext 1	11010100	0xd4
fixext 2	11010101	0xd5

where:

Y: 1-512 unit id of a map space
key: the string to save in that map space
+--------+--------+========+
|  0xd4  |YYYYYYYY|  key  |
+--------+--------+========+

Z: lookup the previously assigned key
+--------+--------+
|  0xd5  |ZZZZZZZZ|
+--------+--------+

this allows reused keys (i.e. for object serialization) to use up much less space.

I.e. if you have a list of objects like {id:1,name:"test"} you will save 4 bytes per iteration (one from id, and 3 from name)

Quick start

// Got ArrayBuffer object
var packed = msgpack.pack( { the: { very: [ "long", true, "data" ], "structure" },
                             depth: "is", such: [ NaN, Inifinity ],
                             wow: new ArrayBuffer(100), is: 100 } );

// Got the original "such much" data structure
var data = msgpack.unpack(packed);

Options

msgpack.MAX_DEPTH = 512 - adjust maximum allowable data depth