Which is better, searching in javascript or database?

I have a grid (employees grid) that will say 1000-2000 lines. I display the employee name and department in the grid. When I get data for the grid, I get other details for the employee (Date of birth, location, role, etc.), Thus, the user has the ability to edit the employee data. when he clicks on the edit, I need to display other employee data in a popup window. since I saved all the data in JavaScript, I am looking for a specific identifier and display all the details. so the code will look like

function getUserDetails(employeeId){
  //i store all the employeedetails in a variable employeeInformation while getting //data for the grid. 
   for(var i=0;i<employeeInformation.length;i++){
        if(employeeInformation[i].employeeID==employeeId){
              //display employee details.
        }
   }
}

the second solution would be like passing employeeid to the database and getting all the information for the employee. The code will be like

function getUserDetails(employeeId){
       //make an ajax call to the controller which will call a procedure in the database
       // to get the employee details
       //then display employee details
    }

, , , , 1000-2000 . , JavaScript , .

:

. 4 500 ( ). , - . , , data-rowId , . , , employeeInfo. - .. $(this).attr('data-rowId') rowId employeeInfo [$ (this).attr('data-rowId')] , , employeeid employee, employeeid, rowid . . .