Question

我正在构建一个交互式地图应用程序，数据库相对较小，约为11mb。然而，它有很多行数据要求我将它们分类到县和年。

我的页面加载速度大约是10-11秒，试图浏览所有这些数据并将其组织起来，然后我可以使用名为mapael的javascript库加载它。

如果有任何办法，我需要一些帮助来尝试更快地提高页面加载速度。查询似乎并不是问题所在。我认为导致问题的数据更多。

 <?php
$mydb = new wpdb('uofimap_data','ob2UoV2X5tNz','uofimap_data','localhost');
$data = $mydb->get_results('
                            SELECT state,county,ship_date,total_cost, quantity FROM data
                            ORDER BY county ASC, ship_date ASC
                       ');
$dataArray = array(
        2006 => '',
        2007 => '',
        2008 => '',
        2009 => '',
        2010 => '',
        2011 => '',
        2012 => '',
        2013 => '',
        2014 => '',
);
$prevCounty = null;
$prevState = null;
$prevYear = null;
$countySum = null;
$quantitySum = null;
foreach ($data as $obj) :
    //temp array to push everything into dataArray for year structure and keep all data in tact.
    $tempArray = array();
    //all the information to use for use
    $date = date('Y', strtotime($obj->ship_date));
    $state = $obj->state;
    $county = $obj->county;
    $cost = $obj->total_cost;
    $quantity = $obj->quantity;

    //Print only the needed values which is the sums of that county for that particular year.
    if($prevCounty == $county){
        if($prevYear == $date){
        } else {
            array_push($tempArray, $prevCounty, $prevState, $countySum, $quantitySum);
            $dataArray[$prevYear][] = $tempArray;   
        }
    } else {
        if($prevCounty == null){
            //Only needed if first value in database is a solo county / year. 
            //echo $county . ', ' . $state . ' : ' . $cost . ' ' . $date . ' New Null<br>';
        } else {
            array_push($tempArray, $prevCounty, $prevState, $countySum, $quantitySum);
            $dataArray[$prevYear][] = $tempArray;
        }
    }

    //Set everything 
    if($prevCounty == $county){
        if($prevYear == $date){
            $countySum += $cost;
            $quantitySum += $quantity;
            //echo $county . '  ' . $countySum . '  '. $state . '  ' . $date . ' ' . $quantitySum . ' Previous Year<br>';
        } else {
            $countySum = $cost;
            $quantitySum += $quantity;
            //echo $county . '  ' . $countySum . '  '. $state . '  ' . $date . ' ' . $quantitySum . ' Current Year<br>';
        }
    } else {
        $countySum = $cost;
        $quantitySum = $quantity;
        //echo $county . '  ' . $countySum . '  '. $state . '  ' . $date . ' ' . $quantitySum . ' New County <br>';
    }
    $prevCounty = $county;
    $prevState = $state;
    $prevYear = $date;



endforeach;


$mapaelJson =  '<script type="text/javascript">';
$mapaelJson .= 'data={';
foreach($dataArray as $key => $value){
    $mapaelJson .= '"' . $key . '": {';
    $mapaelJson .= '"areas":{';
    foreach($value as $key1 => $value1){
        $county = $value1[0];
        $county = ucwords(strtolower($county));
        $state = $value1[1];
        $total = $value1[2];
        $quantity = $value[3];

        //var_dump($value1);

        $mapaelJson .= '"'.$county . ', '. $state . '" : {';
            $mapaelJson .= '"county" : "' . $county . '",';
            $mapaelJson .= '"value" : "' . $total . '",';
            $mapaelJson .= '"quantity" : "' . $quantity . '",';
        $mapaelJson .= '},';

    }
    $mapaelJson .= '} },';
}
$mapaelJson .= '};</script>';

echo $mapaelJson;


?>

Answer 1

你有没有看过剖面仪？如果您可以使用免费版本的Blackfire.io或使用xdebug的cachegrind文件创建跟踪，这将为您提供最佳的优化思路。

无论如何，暂时你肯定需要减少循环和内循环的数量。此外，尽可能多地尝试减少压痕（保持较低的级别以获得更高的可读性）。你可以经常在循环中使用continue，这通常有帮助。

页面速度由于php循环和导出数据而需要时间加载

1 个答案: