René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Optinally wrap msgpack_object instead of converting to V8 object","articleBody":"Currently `msgpack.unpack()`, converts the `msgpack_object` from C/C++ lib into a V8 object visiting the `msgpack_object` entirely with recursion.\r\nSuch an approach is known to be ~ 3.5 times [slower](https://github.com/msgpack/msgpack-node#performance) than `JSON.parse()`. I could get approximately the same performance on nodejs 7.5 with msgpack 1.0.2.\r\n\r\nIn `msgpack.cc`, the recursive implementation of `msgpack_to_v8` repeatedly calls `Nan::New`.\r\nBuilding the V8 object is the most expensive part and disabling V8 object creation (C library `msgpack_unpack`) still being called, I could get encouraging numbers:\r\n\r\n`json: 723.140ms\r\nmsgpack: 458.431ms`\r\n\r\nmedian out of 10 runs of:\r\n\r\n```javascript\r\nconsole.time('json');\r\nvar sj = JSON.stringify(data);\r\nfor (let i = 0; i \u003c 500000; i++) {\r\n    JSON.parse(sj);\r\n}\r\nconsole.timeEnd('json');\r\nvar sj = msgpack.pack(data);\r\nconsole.time('msgpack');\r\nfor (let i = 0; i \u003c 500000; i++) {\r\n    msgpack.unpack(sj);\r\n}\r\nconsole.timeEnd('msgpack');\r\n```\r\n\r\nsuggesting that most of the time is spent to build a V8 object.\r\n\r\nIn some use cases where the full object is not needed or not repeatedly accessed, better performance could be achieved wrapping the `msgpack_object` struct within a V8 object with getters of computed property names (not sure how transparent that can be).\r\n\r\nIf an `msgpack_object` representing:\r\n\r\n```javascript\r\nvar o = {\"a\" : 1, \"b\" : 2, \"c\" : [1, 2, 3]};\r\n```\r\n\r\nis given, `o.c[1]` only creates and returns a number instead of the full object structure.\r\nAssumption is to have less overhead and performance comparable to direct use of C library.\r\nWas this ever tried? Does it make sense at all?","author":{"url":"https://github.com/comick","@type":"Person","name":"comick"},"datePublished":"2017-02-26T13:59:33.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/40/msgpack-node/issues/40"}