Low speed render

[PowerMakc]

Hello. I recently rewrote my site to another engine and installed Twig 3 there. I found that the render file function with a minimum number of HTML tags and without any attachments or data is rendered for a very long time - 70 ms. While loading Twig itself takes only 14 ms. It is the render function that slows down the site a lot. Tell me where to look for the problem?

nginx, php - 8.4, twig - 3, cache = off, ssd speed 1.5Gb/s

public static function twig($viewDir = null, $getShared = true)
{
$appPaths = new \Config\Paths();
$appViewPaths = $viewDir ?? $appPaths->viewDirectory;

    $loader = new \Twig\Loader\FilesystemLoader($appViewPaths);

    $twig = new \Twig\Environment($loader, [
        'debug' => false,
        'cache' => false,
        'autoescape' => 'html',
        'charset' => 'utf-8',
    ]);

    $twig->addFilter( new \Twig\TwigFilter('is_array', 'is_array') );

    return $twig;

}

page.tpl

{{ text|raw }}

In the view() function I call twig:

$twig = \Config\Services::twig(); // 14ms

$tpl_data = [];
$template = $twig->render('page.tpl', $tpl_data); // 70ms

If I use insertion into the index.tpl (extends), the time increases to 200ms
The previous project had the same templates and they were loaded in !!! 9ms with insertion into the index.tpl

Previous version of the site - nginx, php 7.4, twig 2.15.5, cache = off

[lyrixx]

nginx, php - 8.4, twig - 3, cache = off, ssd speed 1.5Gb/s

Why did you said cache = off According to your code, cache is enabled.

---

But something looks really strange. Twig is known for being much much faster.

You could try to profile your website with blackfire

[PowerMakc]

nginx, php - 8.4, twig - 3, cache = off, ssd speed 1.5Gb/s

Why did you said cache = off According to your code, cache is enabled.

But something looks really strange. Twig is known for being much much faster.

You could try to profile your website with blackfire

I tested different options (corrected), yes with cache it is faster, but still much slower than before

[lyrixx]

We'll need a full reproducer to help you

[PowerMakc]

I installed Xdebug and opened its log in KCacheGrind. Here you can see that after calling the load() script slowed down a lot. Do you have the ability to open my trace in KCacheGrind? Can this help?

[GromNaN]

Environment::parse() is done during the compilation of the template. This operation should not be done more that 1 time per template in production. You must enable Twig cache to get decent performances.

    $loader = new \Twig\Loader\FilesystemLoader($appViewPaths);

    $twig = new \Twig\Environment($loader, [
        'debug' => false,
-       'cache' => false,
+       'cache' => sys_get_temp_dir().'/twig_cache',
        'autoescape' => 'html',
        'charset' => 'utf-8',
    ]);

    $twig->addFilter( new \Twig\TwigFilter('is_array', 'is_array') );

    return $twig;

[PowerMakc]

This does not solve the problem itself, but only slightly mitigates it. With the cache enabled, it still loads several times longer than the old version of the site with the cache disabled.
Twig\NodeTraverser->traverseForVisitor called 37K times. Is this how it should be? What is the NodeTraverser.php file responsible for?