Laravel 通过视图传递大数据，加载时间慢

Question

我需要通过 Laravel 中的视图传递大量数据，看起来很费时间，有人可以建议改进此代码/传递此数据量的正确方法吗通过视图？

从我的 PC 上加载此页面非常慢，在实时系统中，一次在服务器上似乎花费的时间更少，但我认为速度不够快。

我看到这个依赖项应该有助于实时系统 composer install --optimize-autoloader --no-dev 但我还没有安装它，这将有助于我的速度，因为我有很多类需要初始化？

第一段代码它获取每个城市的连接，我们使用的是多模式 PostgreSQL 数据库，因此对于每个 URL/city1 URL/city2 等它需要找到从哪个数据库获取数据。

/**
 * Create objects that we will need to query
 */

$this->Response = new Response;
$this->Response->initialize($connection);
$this->Responder = new Responder;
$this->Responder->initialize($connection);
$this->Interests = new lutInterest;
$this->Interests->initialize($connection);
$this->Issue = new lutIssue;
$this->Issue->initialize($connection);
$this->Time = new lutTime;
$this->Time->initialize($connection);

然后我需要检查 schemeid 参数是否存在及其值，然后运行来自 DB

的相关查询

/**
 * check the schemeid paramenter
 * Do the queries
 */
if ($_GET['schemeid'] == 0)
{
    $totalIssues = $this->Response->orderby('issueid')->groupby('issueid')->select('issueid', DB::raw('count(*) as total'))->get();
    $totalTimes = $this->Response->orderby('timeid')->groupby('timeid')->select('timeid', DB::raw('count(*) as total'))->get();
    $totalParticipants = DB::connection($connection)->table('responder_interests')->groupby('interestid')->orderby('interestid')->select('interestid', DB::raw('count(*) as total'))->get();
    $totalResponses = $this->Response->select(DB::raw('count(responseid) as total'),DB::raw("EXTRACT('year' FROM created_at) as year,EXTRACT('month' FROM created_at) as month"))->groupby('year','month')->orderby('year','asc')->orderBy('month','asc')->get();
    $totalRespArray = $this->Response->select(DB::raw('count(*) as total'))->get();
    $totalresponders = $this->$responders->count();
}
else
{
    $responders = $this->Response->where('scheme_id',$_GET['schemeid'])->groupby('responderid')->orderby('responderid')->select('responderid')->get();
    $respondersIDs = $responders->map(function ($data) { return $data->responderid; });

    $totalIssues = $this->Response->orderby('issueid')->groupby('issueid')->where('scheme_id', $_GET['schemeid'])->select('issueid', DB::raw('count(*) as total'))->get();
    $totalTimes = $this->Response->orderby('timeid')->groupby('timeid')->where('scheme_id', $_GET['schemeid'])->select('timeid', DB::raw('count(*) as total'))->get();
    $totalParticipants = DB::connection($connection)->table('responder_interests')->groupby('interestid')->orderby('interestid')->wherein('responderid',$respondersIDs)->select('interestid', DB::raw('count(*) as total'))->get();
    $totalResponses = $this->Response->where('scheme_id',$_GET['schemeid'])->select(DB::raw('count(responseid) as total'),DB::raw("EXTRACT('year' FROM created_at) as year,EXTRACT('month' FROM created_at) as month"))->groupby('year','month')->orderby('year','asc')->orderBy('month','asc')->get();
    $totalRespArray = $this->Response->where('scheme_id',$_GET['schemeid'])->select(DB::raw('count(*) as total'))->get();
    $totalresponders = $responders->count();
}

和最后的运行几个函数来正确格式化数据并能够正确显示在图表中。

/**
 * Convert issue data
 */
$categoryData = $totalIssues->map(function ($data) { return $data->total; });
$categoryLabels = $totalIssues->map(function ($data) { return $this->Issue->where('issueid',$data->issueid)->first()->shortdesc; });
$categoryBorder = $totalIssues->map(function ($data) { return $this->Issue->where('issueid',$data->issueid)->first()->color; });
$categoryColors = $categoryBorder->map(function ($data) { return implode('', [str_replace('rgb', 'rgba' ,explode(" ", $data)[0]),explode(" ", $data)[1], str_replace(')', ',0.2)' ,explode(" ", $data)[2])] );});
$categoryColorsHover = $categoryBorder->map(function ($data) { return implode('', [str_replace('rgb', 'rgba' ,explode(" ", $data)[0]),explode(" ", $data)[1], str_replace(')', ',0.5)' ,explode(" ", $data)[2])] );});

/**
 * Convert time data
 */
$timeData = $totalTimes->map(function ($data) { return $data->total; });
$timeLabels = $totalTimes->map(function ($data) { return $this->Time->where('timeid',$data->timeid)->first()->shortdesc; });
$timeBorder = $totalTimes->map(function ($data) { return $this->Time->where('timeid',$data->timeid)->first()->color; });
$timeColors = $timeBorder->map(function ($data) { return implode('', [str_replace('rgb', 'rgba' ,explode(" ", $data)[0]),explode(" ", $data)[1], str_replace(')', ',0.2)' ,explode(" ", $data)[2])] );});
$timeColorsHOver = $timeBorder->map(function ($data) { return implode('', [str_replace('rgb', 'rgba' ,explode(" ", $data)[0]),explode(" ", $data)[1], str_replace(')', ',0.5)' ,explode(" ", $data)[2])] );});

/**
 * Convert the interests data
 */
$participantData = $totalParticipants->map(function ($data) { return $data->total; });
$participantLabels = $totalParticipants->map(function ($data) { return $this->Interests->where('interestid',$data->interestid)->first()->shortdesc; });
$participantBorder = $totalParticipants->map(function ($data) { return $this->Interests->where('interestid',$data->interestid)->first()->color; });
$participantColors = $participantBorder->map(function ($data) { return implode('', [str_replace('rgb', 'rgba' ,explode(" ", $data)[0]),explode(" ", $data)[1], str_replace(')', ',0.2)' ,explode(" ", $data)[2])] );});
$participantColorsHover = $participantBorder->map(function ($data) { return implode('', [str_replace('rgb', 'rgba' ,explode(" ", $data)[0]),explode(" ", $data)[1], str_replace(')', ',0.5)' ,explode(" ", $data)[2])] );});

/**
 * Convert the responses data
 */
$responseData = $totalResponses->map(function ($data) { return $data->total; });
$responseLabels = $totalResponses->map(function ($data) { return date("M", mktime(0, 0, 0, $data->month,1)).' | '.substr($data->year,2); });

/**
 * Convert the total amount of responses data
 */
$totalResp = $totalRespArray->map(function ($data) { return $data->total; });

/**
 * send the issues and times for the popup
 */

$lutissue = $this->Issue->select('issueid', 'description')->orderby('sort')->get();
$luttime = $this->Time->select('timeid', 'description')->orderby('sort')->get();

将所有内容传递到视图中

return view('dasboard')->with(compact('title', 'schemeDocuments', 'schemes',
                'categoryData', 'categoryLabels', 'categoryBorder', 'categoryColors', 'categoryColorsHover','timeData', 'timeLabels',
                'timeBorder', 'timeColors', 'timeColorsHOver', 'participantData', 'participantLabels', 'participantBorder', 'participantColors',
                'participantColorsHover', 'responseData','responseLabels','totalResp', 'lutissue', 'luttime', 'totalresponders'));

Answer 1

50 KB 的数据（如评论中所述）非常少，因此将数据从服务器传输到客户端不是您的情况的瓶颈。您的数据不像问题标题所暗示的那样"big"。

我将这段代码放在 app\Providers\AppServiceProvider.php 中的 boot 方法中。然后每个数据库查询花费的时间将被记录在 storage\logs.

\DB::listen(function ($query) {
    \Log::info($query->time . ' milliseconds for ' . $query->sql);
});

您还可以计算并记录任意代码段的执行时间：

$start = microtime(true);

// This may be anything between a single line of code and your whole script

\Log::info(microtime(true) - $start); // This is in seconds

找出是什么花费了这么长时间，然后尝试优化查询（或其他代码）。

您还询问是否可以使用 AJAX 在加载数据之前呈现 HTML 的替代方法。我强烈建议您使用 AJAX 了解如何执行此操作，但我也认为在您的情况下可能有一些方法可以加快查询速度，这样您就可以简单地等待数据并在单个请求中加载所有内容。

您的代码非常复杂，我建议您考虑将其拆分为更小的函数并使用更多注释，但这不会使您的代码运行更快。

Laravel 通过视图传递大数据，加载时间慢

Laravel pass big data through a view, load time slow

laravel

eloquent

multi-database