for ($i = 0; $i < 100000; ++$i)
{
    $product = new Product();
    $product->id_category_default = Category::getRootCategory()->id;
    $product->category[] = array(2);
    $product->quantity = 100;
    $product->active = 1;
    foreach (Language::getLanguages() as $language)
        $product->name[$language['id_lang']] = 'Товар №' . $i;
    foreach (Language::getLanguages() as $language)
        $product->description[$language['id_lang']] = 'Описание для товара №' . $i;
    $product->price = 100;
    foreach (Language::getLanguages() as $language)
        $product->link_rewrite[$language['id_lang']] = Tools::link_rewrite($product->name[$language['id_lang']]);
    $product->add();
}