[ ZEPPELIN-1559 ] Code Editor slow performance resolve of the many Notebooks

[cloverhearts]

What is this PR for?

Currently, if you have a Notebook large number of,
There is a sharp decrease in performance of the Code editor.
The number and Paragraph creation of the Notebook does not have a relationship.
We are should always use the Code editor of the same performance.

I had to print a Notebook list only if there is a request.
There was quite a lot of performance improvements.

What type of PR is it?

Improvement

Todos

• - change Notebook list render logic

What is the Jira issue?

https://issues.apache.org/jira/browse/ZEPPELIN-1559
https://issues.apache.org/jira/browse/ZEPPELIN-1513

How should this be tested?

1. Create a notebook over 1000. (tested 10,000)
   I've used script on this. (important! please, backup for notebooks directory.)

#/bin/bash

idx="0"

while [ $idx -lt 1000 ] # notebooks count 1000
do
  mkdir $idx
  echo """
{
    \"paragraphs\": [
    {
        \"text\": \"fsdkljfowiejfowejfoiwefiowejfiojlkdsjfklsdjflkjsdflkjwlkjefewf\",
            \"dateUpdated\": \"Oct 13, 2016 5:02:44 PM\",
            \"config\": {
                \"colWidth\": 12.0,
            \"graph\": {
                \"mode\": \"table\",
            \"height\": 300.0,
            \"optionOpen\": false,
            \"keys\": [],
            \"values\": [],
            \"groups\": [],
            \"scatter\": {},
            \"map\": {
                \"baseMapType\": \"Streets\",
            \"isOnline\": true,
            \"pinCols\": []
    }
    },
        \"enabled\": true,
        \"editorMode\": \"ace/mode/scala\"
    },
        \"settings\": {
            \"params\": {},
        \"forms\": {}
    },
        \"apps\": [],
        \"jobName\": \"paragraph_1476345687682_-1459653828\",
        \"id\": \"20161013-170127_68316618\",
        \"dateCreated\": \"Oct 13, 2016 5:01:27 PM\",
        \"status\": \"READY\",
        \"progressUpdateIntervalMs\": 500
    }
    ],
        \"name\": \""${idx}"\",
        \"id\": \""${idx}"\",
        \"angularObjects\": {
            \"2BZSC9D3G:shared_process\": [],
        \"2BXGWF5TF:shared_process\": [],
        \"2BYKTADMA:shared_process\": [],
        \"2BYFT9HTZ:shared_process\": [],
        \"2BXDTJMED:shared_process\": [],
        \"2BZHPZ6NS:shared_process\": [],
        \"2BYKRWYB3:shared_process\": [],
        \"2BZH2UAT4:shared_process\": [],
        \"2BZ38J35G:shared_process\": [],
        \"2BXJ2X464:shared_process\": [],
        \"2BYQ57ED9:shared_process\": [],
        \"2BXDSA2SN:shared_process\": [],
        \"2BWZCTD2B:shared_process\": [],
        \"2BWT81MNU:shared_process\": [],
        \"2BWA7ZTRD:shared_process\": [],
        \"2BXW6X5KN:shared_process\": [],
        \"2BVWDQPXH:shared_process\": [],
        \"2BZGAF8KG:shared_process\": []
},
    \"config\": {},
    \"info\": {}
    }
  """ > $idx/note.json

  idx=$[$idx+1]
done

1. zeppelin restart or refresh notebook.
2. Try coding in any notebook. (fast)

Screenshots (if appropriate)

before ( 5000 notebooks)

after ( 5000 notebooks)

Questions:

• Does the licenses files need update? no
• Is there breaking changes for older versions? no
• Does this needs documentation? no

[cloverhearts]

added jira issue https://issues.apache.org/jira/browse/ZEPPELIN-1513

[Leemoonsoo]

Tested and confirmed angular watcher reduced from 5xxx -> 3xx in case of 1k notes. Great work!

[corneadoug]

It doesn't look like that 'id' is being used

[cloverhearts]

@corneadoug
thank you!
Modification was completed. :)

[Leemoonsoo]

LGTM and merge if there're no more discussions.