read.php

<?php
require 'vendor/autoload.php';

use Aws\DynamoDb\DynamoDbClient;

$client = DynamoDbClient::factory(array(
    'region'    =>  'us-west-2',
    'scheme'    =>  'http',
    #"client.backoff" => false,
    'client.backoff.logger' =>  'debug',
));


for($i = 0; $i < 50000;  $i++){

    $id = rand(0,10000000);

    $start = microtime_float();
    $result = $client->query(array(
        'TableName' =>  'audience',
        'KeyConditions' =>  array(
            'userid'    =>  array(
                'AttributeValueList'    =>  array(
                    array('S'   =>  $id  )
                ),
                'ComparisonOperator'    =>  'EQ'
            )
        )
    ));
    $end = microtime_float();
    $delta = round(($end - $start)*1000,2);
    printf ("%s, %s, %s, %s\n",  $i, $id, count($result['Items']),$delta);
}

function microtime_float()
{
    list($usec, $sec) = explode(" ", microtime());
    return ((float)$usec + (float)$sec);