Kibana is very slow to load result - json

Question

I have tried Elasticsearch 2.3.2 and Kibana Version 4.5.0 to store big Json object containing a lot of info of Windows OS, an example of json type is the followed:
{
"_index": "siem",
"_type": "rmd-siem",
"_id": "2b1fc911-85f6-48f3-a7ba-b9e5f6e8b38f",
"_score": null,
"_source": {
"timestamp": "2016-05-08T15:00:37.000Z",
"BIOS": {
"CURRENTLANGUAGE": "en|US|iso8859-1",
"BIOSCHARACTERISTICS": "{4;7;9;11;12;15;16;19;21;22;23;24;27;28;30;32;33;40;41;42;48;56;57;64;65;66;67;68;69;70;71;72;73;74;75;76;77;78;79}",
"NAME": "xxxxx",
"SERIALNUMBER": "xxxxx",
"DESCRIPTION": "xxxcv",
"SMBIOSMINORVERSION": 6,
"INSTALLABLELANGUAGES": 1,
"RELEASEDATE": "24-May-2010 12:00:00 AM",
"STATUS": "OK",
"LISTOFLANGUAGES": "{en|US|iso8859-1}",
"HOST": "GOLFINHO_OSM1",
"SMBIOSPRESENT": "TRUE",
"PRIMARYBIOS": "TRUE",
"VERSION": "DELL - 1",
"TARGETOPERATINGSYSTEM": 0,
"SMBIOSBIOSVERSION": "1.3.6",
"SOFTWAREELEMENTID": "xxxccv",
"SMBIOSMAJORVERSION": 2,
"SOFTWAREELEMENTSTATE": 3,
"TIMESTAMP": "2016-05-08 15:00:37",
"MANUFACTURER": "Dell Inc."
}
},
"fields": {
"timestamp": [
1462719637000
]
},
"sort": [
1462719637000
]
}
I have other big json that they are json array containing json object with many data. So I have few object but with very info.
While I tryed Kibana to show the info I saw that the load data for a few hits (results) is very slow in loading phase.
I think that the issue could be to amount of data (a lot info inside json object) because from the test performed I have seen about 22 seconds to receive data and to render the data inside Kibana others 40 seconds for total of 277 hits.
I ask you if the issue is the big json or there is another reason. Thanks