easyui-treegrid，关闭与打开子节点性能好差

数据是一次性加载回来的，关闭和打开子节点性能好差，求大神优化一下
使用方法如下：
 <table id="count_all_company_data_grid"  style = "text-align: left;"
               class="easyui-treegrid" 
                data-options="url: '${baseURL}/broadbandAndTv/broadbandTvAction!ajaxAllCompanyAndGridData.action',
                 method: 'post',
  showFooter: true,
  idField: 'id',
treeField: 'companyName',

">返回数据格式如下：
{total: 1172,…}
rows
:
[{_parentId: 0, aimsValue: "2200", auroraBroadbandArrivals: "0", aurorabroadbandNetGrowth: "0",…},…]
[0 … 99]
0
:
{_parentId: 0, aimsValue: "2200", auroraBroadbandArrivals: "0", aurorabroadbandNetGrowth: "0",…}
aimsValue
:
"2200"
auroraBroadbandArrivals
:
"0"
aurorabroadbandNetGrowth
:
"0"
broadbandArrivals
:
"0"
broadbandNGACR
:
"0.00%"
broadbandNetGrowth
:
"0"
children
:
[]
companyName
:
"曲江"
fiftyAboveAccounting
:
"0"
id
:
1
monthRenewalRate
:
"0.00%"
quarterlyRenewalRate
:
"0.00%"
railcomMonthRenewalRate
:
""
state
:
"closed"
tvBusinessArrivals
:
"0"
tvBusinessPermeability
:
"0.00%"
twentyAccounting
:
"0"
twentyFollowingAccounting
:
"0"
_parentId
:
0