Slow Performance of ProductMetadata::getVersion

[beberlei]

Preconditions (*)

Any Magento 2 version.

Steps to reproduce (*)

1. Have a more complex composer.json with source checked repositories (git checkouts for example).
2. A plugin that calls ProductMetadata::getVersion to check for Magento version.

Expected result (*)

Calling ProductMetadata::getVersion, I expected it to be a function returning a constant. Super-fast.

Actual result (*)

147ms in this case with 7 calls to proc_open, calling svn, git, hg to retrieve versions of source packages. In addition the PHP based JSON Parser is triggered for ~15ms. This overhead is present regardless f all packages were dist or source based and their version were known.

This output is from Tideways callgraph profiler:

This is related to the closed #23242 ticket that wasn't reproduced.

This performance issue is especially critical, because they way plugins check the magento version, this overhead is usually present in all requests to a Magento 2 shop.

[m2-assistant]

Hi @beberlei. Thank you for your report.
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• Information on your environment
• Steps to reproduce
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• yes
• no

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[m2-assistant]

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[magento-engcom-team]

✅ Confirmed by @davidverholen
Thank you for verifying the issue. Based on the provided information internal tickets MC-18958 were created

Issue Available: @davidverholen, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[davidverholen]

it has been a constant originally. It should probably be changed back again with the constant update being part of the release process
e46a3cf#diff-162b082e41b9d0990e5dcc7439d19f26

This method is called several times in the core. Also, 3rd party extensions are using it to check compatibility of features.
In very many cases this leads to every uncached request being 100ms - 200ms slower

[beberlei]

The easiest fix would be using the composer json finder there and parse the versions out intead of using ComposerInformation:

diff --git a/lib/internal/Magento/Framework/App/ProductMetadata.php b/lib/internal/Magento/Framework/App/ProductMetadata.php
index c9fde94352a..5fdef2ba5c5 100644
--- a/lib/internal/Magento/Framework/App/ProductMetadata.php
+++ b/lib/internal/Magento/Framework/App/ProductMetadata.php
@@ -7,10 +7,7 @@
  */
 namespace Magento\Framework\App;
 
-use Magento\Framework\Composer\ComposerFactory;
 use \Magento\Framework\Composer\ComposerJsonFinder;
-use \Magento\Framework\App\Filesystem\DirectoryList;
-use \Magento\Framework\Composer\ComposerInformation;
 
 /**
  * Class ProductMetadata
@@ -41,11 +38,6 @@ class ProductMetadata implements ProductMetadataInterface
      */
     protected $composerJsonFinder;
 
-    /**
-     * @var \Magento\Framework\Composer\ComposerInformation
-     */
-    private $composerInformation;
-
     /**
      * @param ComposerJsonFinder $composerJsonFinder
      */
@@ -62,11 +54,13 @@ class ProductMetadata implements ProductMetadataInterface
     public function getVersion()
     {
         if (!$this->version) {
-            if (!($this->version = $this->getSystemPackageVersion())) {
-                if ($this->getComposerInformation()->isMagentoRoot()) {
-                    $this->version = $this->getComposerInformation()->getRootPackage()->getPrettyVersion();
-                } else {
-                    $this->version = 'UNKNOWN';
+            $composerJsonFile = $this->composerJsonFinder->findComposerJson();
+            $installedPackages = json_decode(file_get_contents(dirname($composerJsonFile) . "/vendor/composer/installed.json"));
+
+            foreach ($installedPackages as $package) {
+                if (in_array($package['name'], ['magento/product-community-edition', 'magento/product-enterprise-edition'])) {
+                    $this->version = $package['version'];
+                    break;
                 }
             }
         }
@@ -92,37 +86,4 @@ class ProductMetadata implements ProductMetadataInterface
     {
         return self::PRODUCT_NAME;
     }
-
-    /**
-     * Get version from system package
-     *
-     * @return string
-     * @deprecated 100.1.0
-     */
-    private function getSystemPackageVersion()
-    {
-        $packages = $this->getComposerInformation()->getSystemPackages();
-        foreach ($packages as $package) {
-            if (isset($package['name']) && isset($package['version'])) {
-                return $package['version'];
-            }
-        }
-        return '';
-    }
-
-    /**
-     * Load composerInformation
-     *
-     * @return ComposerInformation
-     * @deprecated 100.1.0
-     */
-    private function getComposerInformation()
-    {
-        if (!$this->composerInformation) {
-            $directoryList              = new DirectoryList(BP);
-            $composerFactory            = new ComposerFactory($directoryList, $this->composerJsonFinder);
-            $this->composerInformation  = new ComposerInformation($composerFactory);
-        }
-        return $this->composerInformation;
-    }
 }

[beberlei]

A better approach (but more complex code wise) would probably be to write a magento-version.php file into the cache directory upon cache generation that contains the version:

<?php
// cache/magento-version.php
return '2.3.2';

and then doing return require $this->cacheDir . '/magento-version.php'; in getVersion() instead.