optimizing loops

src/Composer/DependencyResolver/Solver.php

@@ -677,8 +677,8 @@ class Solver
                 $systemLevel = $level;
             }
 
-            for ($i = 0, $n = 0; $n < count($this->rules); $i++, $n++) {
-                if ($i == count($this->rules)) {
+            for ($i = 0, $n = 0, $count = count($this->rules); $n < $count; $i++, $n++) {
+                if ($i == $count) {
                     $i = 0;
                 }
 

src/Composer/Package/Version/VersionParser.php

@@ -372,7 +372,7 @@ class VersionParser
         $pairs = array_values($pairs);
         $result = array();
 
-        for ($i = 0; $i < count($pairs); $i++) {
+        for ($i = 0, $count = count($pairs); $i < $count; $i++) {
             $pair = preg_replace('{^([^=: ]+)[=: ](.*)$}', '$1 $2', trim($pairs[$i]));
             if (false === strpos($pair, ' ') && isset($pairs[$i+1]) && false === strpos($pairs[$i+1], '/')) {
                 $pair .= ' '.$pairs[$i+1];