laravel-simplepos/app/Providers/AppServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\ServiceProvider;

class AppServiceProvider extends ServiceProvider
{
    /**
     * Register any application services.
     *
     * @return void
     */
    public function register()
    {
        //
    }

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        // for optimize in development log every query
        if (app()->isProduction() == false) {
            DB::listen(function ($query) {
                Log::info(
                    $query->sql,
                    [
                        'bindings' => $query->bindings,
                        'time' => $query->time,
                        'connectionName' => $query->connectionName,
                    ]
                );
            });
        }
    }
}