Reduce unnecessary IO

Author: staabm

src/Data/RawCodeCoverageData.php

@@ -16,10 +16,8 @@
 use function array_intersect_key;
 use function array_map;
 use function count;
-use function explode;
-use function file_get_contents;
+use function file;
 use function in_array;
-use function is_file;
 use function preg_replace;
 use function range;
 use function str_ends_with;
@@ -269,13 +267,11 @@ private function getEmptyLinesForFile(string $filename): array
         if (!isset(self::$emptyLineCache[$filename])) {
             self::$emptyLineCache[$filename] = [];
 
-            if (is_file($filename)) {
-                $sourceLines = explode("\n", file_get_contents($filename));
+            $sourceLines = @file($filename) ?: [];
 
-                foreach ($sourceLines as $line => $source) {
-                    if (trim($source) === '') {
-                        self::$emptyLineCache[$filename][] = ($line + 1);
-                    }
+            foreach ($sourceLines as $line => $source) {
+                if (trim($source) === '') {
+                    self::$emptyLineCache[$filename][] = ($line + 1);
                 }
             }
         }

src/StaticAnalysis/CachingFileAnalyser.php

@@ -13,7 +13,6 @@
 use function file_get_contents;
 use function file_put_contents;
 use function implode;
-use function is_file;
 use function md5;
 use function serialize;
 use function unserialize;
@@ -169,12 +168,14 @@ private function read(string $filename): array|false
     {
         $cacheFile = $this->cacheFile($filename);
 
-        if (!is_file($cacheFile)) {
+        $contents = @file_get_contents($cacheFile);
+
+        if ($contents === false) {
             return false;
         }
 
         return unserialize(
-            file_get_contents($cacheFile),
+            $contents,
             [
                 'allowed_classes' => [
                     Class_::class,