您在示例脚本中使用了很多对象包装器。像load封装成多个循环这样的方法会产生巨大的延迟，并且可能会产生巨大的内存使用（取决于您的产品集合大小）。
当我前几天解决这个问题时，我决定使用直接的 ORM 方法而不是对象来获得更好的性能。
有两种可能的方式来展示畅销书。消耗资源较少的是使用聚合的畅销书表（如sales_bestsellers_aggregated_daily），但它有很大的缺点 - 这些表中的数据不会自动更新。它用于管理报告部分，仅当您选择刷新统计信息时才会更新。
另一种更可靠的方法是连接sales_flat_order_item表以检索每个产品的 sales_qty。显然它更消耗资源，因为您必须自己计算。
在我的脚本中，我选择了后一种路径。我已经对其进行了修改以满足您的逻辑要求。我还添加了几个joins来获取类别名称，您可能不需要它。但是说够了 :) 这是我的test.phpshell 脚本的代码：
<?php
require_once 'abstract.php';
/**
* Magento Test Bestsellers script
*
* @category Mage
* @package Mage_Shell
*/
class Mage_Shell_Test extends Mage_Shell_Abstract
{
/**
* Run script
*
*/
public function run()
{
// benchmarking
$memory = memory_get_usage();
$time = microtime();
echo "Starting mem usage: $memory\n";
$catId = $this->getArg('category');
/** @var $collection Mage_Catalog_Model_Resource_Product_Collection */
$collection = Mage::getResourceModel('catalog/product_collection');
// join sales order items column and count sold products
$expression = new Zend_Db_Expr("SUM(oi.qty_ordered)");
$condition = new Zend_Db_Expr("e.entity_id = oi.product_id AND oi.parent_item_id IS NULL");
$collection->addAttributeToSelect('name')->getSelect()
->join(array('oi' => $collection->getTable('sales/order_item')),
$condition,
array('sales_count' => $expression))
->group('e.entity_id')
->order('sales_count' . ' ' . 'desc');
// join category
$condition = new Zend_Db_Expr("e.entity_id = ccp.product_id");
$condition2 = new Zend_Db_Expr("c.entity_id = ccp.category_id");
$collection->getSelect()->join(array('ccp' => $collection->getTable('catalog/category_product')),
$condition,
array())->join(array('c' => $collection->getTable('catalog/category')),
$condition2,
array('cat_id' => 'c.entity_id'));
$condition = new Zend_Db_Expr("c.entity_id = cv.entity_id AND ea.attribute_id = cv.attribute_id");
// cutting corners here by hardcoding 3 as Category Entiry_type_id
$condition2 = new Zend_Db_Expr("ea.entity_type_id = 3 AND ea.attribute_code = 'name'");
$collection->getSelect()->join(array('ea' => $collection->getTable('eav/attribute')),
$condition2,
array())->join(array('cv' => $collection->getTable('catalog/category') . '_varchar'),
$condition,
array('cat_name' => 'cv.value'));
// if Category filter is on
if ($catId) {
$collection->getSelect()->where('c.entity_id = ?', $catId)->limit(1);
}
// unfortunately I cound not come up with the sql query that could grab only 1 bestseller for each category
// so all sorting work lays on php
$result = array();
foreach ($collection as $product) {
/** @var $product Mage_Catalog_Model_Product */
if (isset($result[$product->getCatId()])) {
continue;
}
$result[$product->getCatId()] = 'Category:' . $product->getCatName() . '; Product:' . $product->getName() . '; Sold Times:'. $product->getSalesCount();
}
print_r($result);
// benchmarking
$memory2 = memory_get_usage();
$time2 = microtime();
$memDiff = ($memory2 - $memory)/1000000;
$timeDiff = $time2 - $time;
echo 'Time spent:' . $timeDiff . "s\n";
echo "Ending mem usage: $memory2\n";
echo "Mem used : {$memDiff}M\n";
}
/**
* Retrieve Usage Help Message
*
*/
public function usageHelp()
{
return <<<USAGE
Usage: php -f test.php -- [options]
php -f test.php -- --category 1
--categories <category> Filter by Category, if not specified, all categories are outputted
help This help
USAGE;
}
}
$shell = new Mage_Shell_Test();
$shell->run();
test.php要使用它，只需在你的shell文件夹中创建一个文件并将我提供的代码插入到文件中。看看usageHelp你是否不熟悉命令行 php 调用。
PS 在那里添加了一些基准测试来跟踪您的 mem_usage 和时间。
更新在进一步审查该问题后，我发现仅使用Zend_Db适配器即可获得每个类别的畅销书的更优雅的方法。结果将仅包含category_id=>product_id连接（不是 Magento 对象），但它更容易且整体更好。此代码应在基准测试块之间进入run函数：
$catId = $this->getArg('category');
/** @var $resource Mage_Core_Model_Resource */
$resource = Mage::getModel('core/resource');
/** @var $adapter Zend_Db_Adapter_Abstract */
$adapter = $resource->getConnection('core_read');
$select = $adapter->select()
->from(array('c' => $resource->getTableName('catalog/category')), array('cat_id'=>'entity_id'))
->join(array('ccp' => $resource->getTableName('catalog/category_product')), 'c.entity_id = ccp.category_id', array())
->join(array('oi' => $resource->getTableName('sales/order_item')), 'ccp.product_id = oi.product_id', array('max_qty' => new Zend_Db_Expr('SUM(oi.qty_ordered - oi.qty_canceled)'), 'product_id' => 'product_id'))
->where('oi.parent_item_id is null')
->group('c.entity_id')
->group('oi.product_id')
->order('entity_id ASC')
->order('max_qty DESC');
if ($catId) {
$select->where('c.entity_id = ?', $catId);
}
$res = $adapter->fetchAll($select);
$result = array();
foreach ($res as $oneRes) {
if (isset($result[$oneRes['cat_id']])) {
continue;
}
$result[$oneRes['cat_id']] = $oneRes;
}
array_walk($result, function($var, $key) {
echo 'Category Id:' . $key . ' | Product Id:' . $var['product_id'] . ' | Sales Count:' . $var['max_qty'] . "\n";
});