我有一个由大表组成的页面，该表从不同的表中获取数据，然后计算每行的不同参数。
表本身是一个dataTable，因此它有不同的JQUERY和JS
页面非常慢。首先我有一分钟的数据上传（我看到5行然后是10行，然后是20 ......）然后我有30秒的css上传（表格看起来不同）。
有没有办法让它更快？
整个代码：
<?php
require 'init.php';
//protection
logged_out_protect_Vendor();
$data = ShowMyProjects($con);
$flag_DueDate = HaveDueDate($data); //flag is 0 if there are no projects with duedates
$guideAgent="http://dub-entas- 124.corp.ebay.com:83/tool/tagmania/guidelines/TagmaniaForAgents.docx";
$user_name=$_SESSION['username'];?>
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<link rel="stylesheet" type="text/css" href="css/style.css" >
<link rel="stylesheet" type="text/css" href="DataTables/jquery.dataTables.css">
<link rel="stylesheet" type="text/css" href="DataTables/shCore.css">
<link rel="stylesheet" type="text/css" href="DataTables/demo.css">
<script type="text/javascript" language="javascript" src="DataTables/jquery.js"></script>
<script type="text/javascript" language="javascript" src="DataTables/jquery.dataTables.js"></script>
<script type="text/javascript" language="javascript" src="DataTables/shCore.js"></script>
<script type="text/javascript" language="javascript" src="DataTables/demo.js"></script>
<script type="text/javascript" language="javascript" class="init">
$(document).ready(function() {
$('#example').dataTable( {
"order": [[ 9, "desc" ]]
} );
} );
</script>
<title>Agent View</title>
<script type="text/javascript" src="js/jquery-1.10.2.min.js"></script>
<script type="text/javascript" src="js/jquery.dataTables.min.js"></script>
<script type="text/javascript" src="//cdn.datatables.net/1.10.0/js/jquery.dataTables.js"></script>
<script type="text/javascript" src="js/jquery.dataTables.columnFilter.js"></script>
<link rel="stylesheet" type="text/css" href="//cdn.datatables.net/1.10.0/css/jquery.dataTables.css" >
</head>
<body class="dt-example">
<div id="wrapper">
<div id="header">
<div id="menu">
<img src="images/Tazlogo.gif" id="taz">
<ul>
<li><a href="logout.php">Log Out</a></li>
<li> <a href="finishedWorking.php" title="By clicking on this link, you will unlock all the rows that are locked by you and can`t be answered by anyone (including you). The lock state happens when you enter the tagging page and then close it without answering the question">Unlock my rows</a></li>
<?php echo '<li><a href ="' . $guideAgent . '"> TagMania Guide </a></li>'; ?>
</ul>
</div>
</div>
<hr />
<div id="page">
<div class="welcome">
<?php
echo 'Good Day ' . $_SESSION['username'] . ', here are your tasks: ';
?>
</div>
<br>
<div class="container">
<form method="get">
<table id="example" class="display" cellspacing="0" width="100%">
<thead>
<tr>
<th> Project name </th>
<th title="general guidelines to this task"> Guidelines</th>
<th> Task type</th>
<th title="Task can be new, in-process and finished. It also can have a status `archiveDM` meaning that the DM decided to archive it."> Status</th>
<?php
//check that we have a duedate column
if ($flag_DueDate==1)
echo '<th title="Some tasks have duedate and some don`t. Those who have a due date will be colored yellow, two days before the duedate and red after the due date. If you finish them, they will return to the regular white background"> Due Date </th>';
?>
<th title="Finish date for all the tasks that were finished"> Finish Date</th>
<th title="The number of the rows in the task that have been tagged by you"> Tagged by you</th>
<th title="The number of rows that you locked. If you see here something other than 0, please click on `Unlock my rows`"> Locked by you</th>
<th title="The number of rows that had been tagged by all the agents"> Tagged sample</th>
<th title="The total number of rows in this task"> Total sample</th>
<th title="Link to the tagging page"> </th>
<th title="Here you can see a report summarizing your answers on this task"> Results</th>
<th title="Here you can download the task in Excel format. You can download the task on every stage - new, in process or finished"> Download </th>
<th title="Click on the checkboxes tasks that you don`t want to appear on the view. Then click on the archive button. Notice that they will dissapear for all the agents."> Archive</th>
</tr>
</thead>
<tfoot>
<tr>
<th> Project name </th>
<th title="general guidelines to this task"> Guidelines</th>
<th> Task type</th>
<th title="Task can be new, in-process and finished. It also can have a status `archiveDM` meaning that the DM decided to archive it."> Status</th>
<?php
//check that we have a duedate column
if ($flag_DueDate==1)
echo '<th title="Some tasks have duedate and some don`t. Those who have a due date will be colored yellow, two days before the duedate and red after the due date. If you finish them, they will return to the regular white background"> Due Date </th>';
?>
<th title="Finish date for all the tasks that were finished"> Finish Date</th>
<th title="The number of the rows in the task that have been tagged by you"> Tagged by you</th>
<th title="The number of rows that you locked. If you see here something other than 0, please click on `Unlock my rows`"> Locked by you</th>
<th title="The number of rows that had been tagged by all the agents"> Tagged sample</th>
<th title="The total number of rows in this task"> Total sample</th>
<th title="Link to the tagging page"> </th>
<th title="Here you can see a report summarizing your answers on this task"> Results</th>
<th title="Here you can download the task in Excel format. You can download the task on every stage - new, in process or finished"> Download </th>
<th title="Click on the checkboxes tasks that you don`t want to appear on the view. Then click on the archive button. Notice that they will dissapear for all the agents."> Archive</th>
</tr>
</tfoot>
<tbody>
<?php
//i already used the data object so we need to point the pointer at the beginning of the data again
mysqli_data_seek($data, 0);
while ( $row = mysqli_fetch_array($data)){
$taskId = $row['ProjectID'];
$tasktype = $row['ProjectType'];
include 'WhatTaskIsIt.php';
$totalSampleQuery = "SELECT COUNT(*)as C FROM $table WHERE TaskID= $taskId";
$totalSample = mysqli_fetch_array(mysqli_query($con, $totalSampleQuery));
$taggedSampleQuery = "SELECT COUNT(*)as C FROM $table WHERE TaskID= $taskId AND rowstatus=2";
$taggedSample = mysqli_fetch_array(mysqli_query($con, $taggedSampleQuery));
$lockedByVendorQuery = "SELECT COUNT(*)as C FROM $table WHERE TaskID= $taskId AND rowstatus=1 AND Agent = '" . $user_name . "'";
$lockedByVendor = mysqli_fetch_array(mysqli_query($con, $lockedByVendorQuery));
// Update Project status to "In-Process" if they are New but have tagged sample
if ($taggedSample['C']>0){
$ProjectStatusQuery = "SELECT ProjectStatus FROM projects WHERE ProjectID=$taskId";
$ProjectStatus = mysqli_fetch_array(mysqli_query($con, $ProjectStatusQuery));
if ($ProjectStatus['ProjectStatus'] == 1) //if the project is NEW (but have tagged rows)
{
$UpdateQuery = "UPDATE projects SET ProjectStatus=2 WHERE ProjectID=$taskId";
mysqli_query($con,$UpdateQuery);
}
}
//lets check what happened to the project status
$ProjectStatusFinalQuery = "SELECT StatusName FROM projects LEFT JOIN projectstatuses ON projects.`ProjectStatus`=projectstatuses.`StatusID` WHERE ProjectID=$taskId";
$ProjectStatusFinal = mysqli_fetch_array(mysqli_query($con, $ProjectStatusFinalQuery));
$VendorTaggedQuery = 'SELECT COUNT(*)as C FROM ' . $table .' WHERE taskID = ' . $taskId . ' AND Agent = "' . $user_name . '" AND RowStatus=2';
$VendorTagged = mysqli_fetch_array(mysqli_query($con, $VendorTaggedQuery));
$linkToDownload = 'downloadFile.php';
if ($flag_DueDate==0) {
echo '<tr>
<td>' . $row['ProjectName'] . '</td>
<td> <a href ="' . $row['GuidelinesURL'] . '"> Guidelines </a> </td>
<td>' . $row['TypeName'] . '</td>
<td>' . $ProjectStatusFinal['StatusName'] . '</td>
<td>' . showDate($row['FinishDate']) . '</td>
<td>' . $VendorTagged['C'] . '</td>
<td>' . $lockedByVendor['C'] . '</td>
<td>' . $taggedSample['C'] . '</td>
<td>' . $totalSample['C'] . ' </td>
<td> <a href= ' . $link . '?id=' . $row['ProjectID'] . '&start_task=1&prevID=0>Start Working</a></td>
<td><a href= taskResults.php?id=' . $row['ProjectID'] . '>Results</a> </td>
<td> <a href= ' . $linkToDownload . '?id=' . $row['ProjectID'] . '>Download</a></td>
<td class ="center"> <input type="checkbox" class="archive" name="archive" value=" ' . $row['ProjectID'] . '"> </td> </tr>';
}
if ($flag_DueDate==1){
if ($row['due_date'] == NULL)
$duedate = "";
else
$duedate = $row['due_date'];
//lets check if this duedate is late or not (but only for unfinished projects)
if ($row['FinishDate'] ==NULL)
$color = Color_DueDate($duedate);
else
$color ="noBackground";
echo '<tr class=" . ' .$color . '">
<td>' . $row['ProjectName'] . '</td>
<td> <a href ="' . $row['GuidelinesURL'] . '"> Guidelines </a> </td>
<td>' . $row['TypeName'] . '</td>
<td>' . $ProjectStatusFinal['StatusName'] . '</td>
<td>' . showDate($duedate) . '</td>
<td>' . showDate($row['FinishDate']) . '</td>
<td>' . $VendorTagged['C'] . '</td>
<td>' . $lockedByVendor['C'] . '</td>
<td>' . $taggedSample['C'] . '</td>
<td>' . $totalSample['C'] . ' </td>
<td> <a href= ' . $link . '?id=' . $row['ProjectID'] . '&start_task=1&prevID=0>Start Working</a></td>
<td><a href= taskResults.php?id=' . $row['ProjectID'] . '>Results</a> </td>
<td> <a href= ' . $linkToDownload . '?id=' . $row['ProjectID'] . '>Download </a></td>
<td class ="center"> <input type="checkbox" class="archive" name="archive" value=" ' . $row['ProjectID'] . '"> </td> </tr>';
}
}
?>
</tbody>
</table>
<input type="button" id="archive" value="Archive" name="submit" />
</form>
<br><br>
<!--imlementing archive button-->
<script>
var $varsToSend="";
$(document).ready(function() {
$("#archive").click(function(){
$varsToSend="";
$(".archive:checked").each(function(){
var $this = $(this);
$varsToSend=$varsToSend+$this.val()+";";
});
//console.log($varsToSend);
$.ajax({
type : 'GET',
url : 'archiveTasksVendor.php',
data: {
projectID : $varsToSend
},
success : function(data){
location.reload();
},
error : function(XMLHttpRequest, textStatus, errorThrown) {
}
});
});
});
</script>
<?php include 'footer.html'; ?>
</div>
对于那些想看表的人： 查询中的表是：Projects，ProjectTypes，ProjectPriorities，ProjectStatuses， 群组
TABLE `projects` (
`ProjectID` INT(11) NOT NULL AUTO_INCREMENT,
`DM_GROUP_ID` INT(11) NOT NULL,
`DM_ID` INT(11) NOT NULL,
`Vendor_GroupID` INT(11) NOT NULL,
`Site` VARCHAR(255) NOT NULL,
`ProjectType` INT(11) NOT NULL,
`priority` INT(11) DEFAULT NULL,
`ProjectName` VARCHAR(255) NOT NULL,
`Project_Comment` VARCHAR(255) DEFAULT NULL,
`CreationDate` DATE NOT NULL,
`LastUpdateDate` DATE DEFAULT NULL,
`due_date` DATE DEFAULT NULL,
`FinishDate` DATE DEFAULT NULL,
`ProjectStatus` INT(11) NOT NULL,
`fileName` VARCHAR(255) DEFAULT NULL,
PRIMARY KEY (`ProjectID`)
) ENGINE=INNODB AUTO_INCREMENT=1368 DEFAULT CHARSET=utf8
CREATE TABLE `projecttypes` (
`TypeID` INT(11) NOT NULL AUTO_INCREMENT,
`TypeName` VARCHAR(255) NOT NULL,
`GuidelinesURL` VARCHAR(255) DEFAULT NULL,
`ProjectQuestion` VARCHAR(255) DEFAULT NULL,
`ValidReasons` VARCHAR(1000) DEFAULT NULL,
`ValidAnswers` VARCHAR(255) NOT NULL,
`style` VARCHAR(32) DEFAULT NULL,
`Aspectlist` VARCHAR(255) DEFAULT NULL,
PRIMARY KEY (`TypeID`)
) ENGINE=INNODB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8
CREATE TABLE `projectpriorities` (
`PriorityID` INT(11) NOT NULL AUTO_INCREMENT,
`PriorityName` VARCHAR(255) NOT NULL,
PRIMARY KEY (`PriorityID`)
) ENGINE=INNODB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8
CREATE TABLE `projectstatuses` (
`StatusID` INT(11) NOT NULL AUTO_INCREMENT,
`StatusName` VARCHAR(255) NOT NULL,
PRIMARY KEY (`StatusID`)
) ENGINE=INNODB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8
CREATE TABLE `usergroups` (
`GroupID` INT(11) NOT NULL AUTO_INCREMENT,
`GroupName` VARCHAR(255) NOT NULL,
`GroupType` VARCHAR(6) NOT NULL,
`RelatedTo` INT(11) NOT NULL,
PRIMARY KEY (`GroupID`)
) ENGINE=INNODB AUTO_INCREMENT=44 DEFAULT CHARSET=utf8
答案 0 :(得分：3)
您正在运行查询totalSampleQuery，taggedSampleQuery，lockedByVendorQuery，ProjectStatusFinalQuery和VendorTaggedQuery（以及可能ProjectStatusQuery和{{1 } <）> 每个行。如果从主查询中选择所有253行，则会为您提供253 + 253 + 253 + 253 + 253（可能+253 +253）额外查询。所有这些查询都会快速添加 。
翻转您的方法：创建一个查询，为{em>所有主表中的行生成与UpdateQuery相同的信息，运行该查询一次循环外，并使用其结果。对当前在循环中运行的所有其他totalSampleQuery查询重复此过程。更好的是，不是单独运行这些额外的查询，而是使用主查询SELECT。
例如，而不是运行
JOIN两百次，运行
SELECT COUNT(*)as C FROM $table WHERE TaskID= ?
。您将在一个查询中获得所有任务的计数。使用SELECT TaskID, COUNT(*) as C FROM $table
GROUP BY TaskID
作为键将所有返回的行拉入数组，并使用主循环内该数组中的数据。
注意：您可能希望在新查询中添加某种过滤器，以仅提取与您正在显示的项目相关的数据。但是您的架构实际上并不包含名为TaskID的列，因此很难建议正确的条件。
优化查询后，您仍然会看到一个显示250行数据的表。显示该表需要大量的HTML，浏览器需要一段时间来渲染和设置它，并且毕竟jQuery DataTables必须将自己附加到表并按您的首选顺序对行进行排序。
TaskID。您的代码存在更多与此特定问题无关的问题。
ORDER BY中提及TaskID，另一个在同一$table中提及taskID。如果您的MySQL在Windows上运行，那么这两个引用相同的列，但在Linux上，表和列名称区分大小写，这意味着其中一个查询将产生错误。同样适用于$table和rowstatus更进一步。RowStatus的项目会怎样？