diff --git a/ext/standard/VmProcess.php b/ext/standard/VmProcess.php
index 1004a498b48..a0bfc2c40c9 100644
--- a/ext/standard/VmProcess.php
+++ b/ext/standard/VmProcess.php
@@ -18,12 +18,9 @@ final class VmProcess
      */
     public static function getrusage(int $who = 0)
     {
-        $raw = false;
-        if (VmGetrusageNative::available()) {
-            $raw = VmGetrusageNative::getrusage($who);
-        } elseif (\function_exists('getrusage')) {
-            $raw = @\getrusage($who);
-        }
+        $raw = VmGetrusageNative::available()
+            ? VmGetrusageNative::getrusage($who)
+            : false;
         if (false === $raw) {
             return false;
         }
diff --git a/ext/standard/VmProcessIdentity.php b/ext/standard/VmProcessIdentity.php
index 3c3a828edc6..588253a8d10 100644
--- a/ext/standard/VmProcessIdentity.php
+++ b/ext/standard/VmProcessIdentity.php
@@ -8,6 +8,7 @@
  * Process identity builtins (issue #6119, native libc #7891).
  *
  * php-src: ext/standard/basic_functions.c — getmyuid, getmygid, get_current_user.
+ * No host \\posix_* / \\get*() delegation — libc FFI only (pairs #7287 getrusage shrink).
  */
 final class VmProcessIdentity
 {
@@ -19,12 +20,6 @@ public static function getmyuid(): int
                 return $uid;
             }
         }
-        if (\function_exists('posix_getuid')) {
-            return (int) \posix_getuid();
-        }
-        if (\function_exists('getuid')) {
-            return (int) \getuid();
-        }
 
         throw new \LogicException('getmyuid() requires POSIX support in this compiler build');
     }
@@ -37,12 +32,6 @@ public static function getmygid(): int
                 return $gid;
             }
         }
-        if (\function_exists('posix_getgid')) {
-            return (int) \posix_getgid();
-        }
-        if (\function_exists('getgid')) {
-            return (int) \getgid();
-        }
 
         throw new \LogicException('getmygid() requires POSIX support in this compiler build');
     }
@@ -58,24 +47,6 @@ public static function getCurrentUser(): string
                 }
             }
         }
-        $euid = null;
-        if (\function_exists('posix_geteuid')) {
-            $euid = (int) \posix_geteuid();
-        } elseif (\function_exists('geteuid')) {
-            $euid = (int) \geteuid();
-        }
-        if (null !== $euid && \function_exists('posix_getpwuid')) {
-            $pw = @\posix_getpwuid($euid);
-            if (\is_array($pw) && isset($pw['name']) && '' !== $pw['name']) {
-                return (string) $pw['name'];
-            }
-        }
-        if (null !== $euid && \function_exists('getpwuid')) {
-            $pw = @\getpwuid($euid);
-            if (\is_object($pw) && isset($pw->pw_name) && '' !== $pw->pw_name) {
-                return (string) $pw->pw_name;
-            }
-        }
 
         return 'Unknown';
     }
diff --git a/test/unit/VmGetrusageNativeTest.php b/test/unit/VmGetrusageNativeTest.php
index 8572ef6086c..06ecdf64427 100644
--- a/test/unit/VmGetrusageNativeTest.php
+++ b/test/unit/VmGetrusageNativeTest.php
@@ -17,6 +17,8 @@ public function testVmProcessPrefersNativeOverHostDelegation(): void
         $this->assertStringContainsString('VmGetrusageNative::available()', $source);
         $this->assertStringContainsString('VmGetrusageNative::getrusage', $source);
         $this->assertStringNotContainsString('host libc via Zend PHP', $source);
+        $this->assertStringNotContainsString("function_exists('getrusage')", $source);
+        $this->assertDoesNotMatchRegularExpression('/\\\\getrusage\\s*\\(/', $source);
     }
 
     public function testNativeDefinesLibcGetrusageFfi(): void
diff --git a/test/unit/VmProcessIdentityNativeTest.php b/test/unit/VmProcessIdentityNativeTest.php
index 7fd606ecb59..24366fc6216 100644
--- a/test/unit/VmProcessIdentityNativeTest.php
+++ b/test/unit/VmProcessIdentityNativeTest.php
@@ -19,6 +19,13 @@ public function testVmProcessIdentityPrefersNativeOverHostDelegation(): void
         $this->assertStringContainsString('VmProcessIdentityNative::getgid()', $source);
         $this->assertStringContainsString('VmProcessIdentityNative::geteuid()', $source);
         $this->assertStringContainsString('VmProcessIdentityNative::getpwuidName', $source);
+        $this->assertStringNotContainsString("function_exists('posix_", $source);
+        $this->assertStringNotContainsString("function_exists('getuid')", $source);
+        $this->assertStringNotContainsString("function_exists('getgid')", $source);
+        $this->assertStringNotContainsString("function_exists('geteuid')", $source);
+        $this->assertStringNotContainsString("function_exists('getpwuid')", $source);
+        $this->assertDoesNotMatchRegularExpression('/\\\\posix_[a-z_]+\\(/', $source);
+        $this->assertDoesNotMatchRegularExpression('/\\\\getpwuid\\s*\\(/', $source);
     }
 
     public function testVmDateGetmygrgidUsesProcessIdentity(): void