Hi Nuno, The difference is speed. Just run the test/bench program:
JSON.parse: 584 ms I-JSON single chunk: 956 ms I-JSON multiple chunks: 1235 ms jsonparse single chunk: 8238 ms DIFFERENT RESULTS! 62: a1= "latitude": -77.373901, 62: a2= "latitude": -77.37390099999999, clarinet single chunk: 5244 ms clarinet does not materialize result, time is for parsing only Our application manipulates a lot of JSON data. I want to eliminate big JSON.parse calls that block the event loop and go with a streaming API but and I'm not ready to pay a high price for it. Bruno On Monday, June 2, 2014 4:05:58 AM UTC+2, Nuno Job wrote: > > why is it different from clarinet or jsonparse[1]? > > for what class of application is the difference meaningful? > > would be happy to refer to this in the clarinet readme, > > nuno > > > On Sun, Jun 1, 2014 at 12:27 PM, Bruno Jouhier <[email protected] > <javascript:>> wrote: > >> Hi Alex, >> >> No, I haven't tried C nor Go. The node and v8 API are exposed in C++. >> Developing with other languages is trickier ( >> http://stackoverflow.com/questions/12088937/is-it-possible-to-write-node-js-addons-in-go). >> >> Why C or Go? >> >> If your concern is speed, I think that the next step is not to change >> language but to hook directly into v8's internals instead of going through >> v8's public APIs. This is how JSON.parse is implemented. I measured the >> total time spent in the public v8 materialization calls (creating strings, >> objects and arrays) and this time alone is equivalent to the total time >> used by JSON.parse. >> >> Bruno >> >> >> On Sunday, June 1, 2014 5:36:01 AM UTC+2, Alex Yaroshevich wrote: >>> >>> Hi Bruno! >>> >>> Did you tried to write it on C or Go? >>> >>> On Saturday, May 31, 2014 3:12:13 AM UTC+4, Bruno Jouhier wrote: >>>> >>>> I just released a first version of i-json, a fast incremental JSON >>>> parser: https://github.com/bjouhier/i-json >>>> >>>> Main features: >>>> >>>> - It is FAST :-), but still slower than JSON.parse :-(. On my bench >>>> (parsing a realistic 8 MB JSON file), it comes out as only 60% slower >>>> than >>>> JSON.parse. In comparison, the pure JS parsers that I have tried are >>>> more >>>> than 6 times slower than JSON.parse. >>>> - It is incremental and it works directly on buffers (on strings >>>> too :-). So you can call it directly with buffers that you receive >>>> through >>>> 'data' events. >>>> - It can work either as a DOM parser or an evented one (less events >>>> than SAX but probably enough). >>>> - API is small. The intent is not to provide a sophisticated API >>>> but a fast engine around which you can build fancier APIs. >>>> - It it implemented in C++ but there is a JS fallback >>>> implementation in case it does not build. the JS implementation is 2.5 >>>> to 3 >>>> times slower. I wrote it in JS initially but was not happy with the >>>> speed. >>>> Both implementations pass the unit test suite. >>>> >>>> Bruno >>>> >>> -- >> Job board: http://jobs.nodejs.org/ >> New group rules: >> https://gist.github.com/othiym23/9886289#file-moderation-policy-md >> Old group rules: >> https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines >> --- >> You received this message because you are subscribed to the Google Groups >> "nodejs" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/nodejs/434777fb-9bcf-4cc8-bd37-caffb76b74b0%40googlegroups.com >> >> <https://groups.google.com/d/msgid/nodejs/434777fb-9bcf-4cc8-bd37-caffb76b74b0%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> For more options, visit https://groups.google.com/d/optout. >> > > -- Job board: http://jobs.nodejs.org/ New group rules: https://gist.github.com/othiym23/9886289#file-moderation-policy-md Old group rules: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines --- You received this message because you are subscribed to the Google Groups "nodejs" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nodejs/824406b1-0e7e-4334-9a85-b73940261570%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
