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Why is query execution time so high ?

See original GitHub issue

Why does same query take around 300 ms more than actual execution time when using Mysql native driver for Nodejs , even with or without using “create pool” options?

Please refer highlighted section in below attached screenshot mysql

Also for native driver execution time, please see below attached screenshot:

native driver

Codebase for node.js Mysql Native driver

db.js


var mysql = require('mysql');
var connectionpool = mysql.createPool({
    connectionLimit: 100, //important
    host: 'localhost',
    user: "your user name",
    password: "your password",
    database: "your database",
    multipleStatements: true,
});

    exports.getConnection = function(callback) {
        connectionpool.getConnection(callback);
    };

emp.js

var connections = require('../db');
     var pre_query = new Date().getTime();
        var sqlstatements = "select  * from employees where recordstate<>'raw'and  DATE(createdAt) " + "between ('1982-03-24') and ('2017-04-23')    order by employeesID desc limit 20 offset 0;" + "select COUNT(*) as count   from employees where recordstate<>'raw'and  " + "DATE(createdAt) between ('1982-03-24') and ('2017-04-23')    order by employeesID desc";
        connections.getConnection(function(err, c) {
            console.log(sqlstatements)
            c.query(sqlstatements, function(err, projects) {


                console.log(err);
                if (!err) {
                    c.release();

                    var red = new Object();
                    red.rows = JSON.parse(JSON.stringify(projects[0]));
                    red.count = JSON.parse(JSON.stringify(projects[1]))[0].count;
                    var post_query = new Date().getTime();
                    // calculate the duration in seconds
                    var duration = (post_query - pre_query) / 1000;
                    console.log(duration)
                        // console.log(red);
                  

                }
            })
        })