Script loader: remove (PHP based) compression from load-styles.php and load-scripts.php. WIth the amount of scripts and stylesheets grown a lot over the years, it has become pretty slow and consumes a lot of server resources. Also, most servers are set to compress PHP output anyway.

SergeyBiryukov · SergeyBiryukov · commit 0839d324aff7 · 2018-09-03T21:16:27.000Z
Props LucasRolff, azaozz. Merges [43580] to the 4.9 branch. Fixes #44815. See #43308. git-svn-id: https://develop.svn.wordpress.org/branches/4.9@43618 602fd350-edb4-49c9-b593-d223f7449a82
diff --git a/src/wp-admin/load-scripts.php b/src/wp-admin/load-scripts.php
@@ -28,8 +28,6 @@
 require( ABSPATH . WPINC . '/script-loader.php' );
 require( ABSPATH . WPINC . '/version.php' );
 
-$compress = ( isset($_GET['c']) && $_GET['c'] );
-$force_gzip = ( $compress && 'gzip' == $_GET['c'] );
 $expires_offset = 31536000; // 1 year
 $out = '';
 
@@ -58,16 +56,5 @@
 header('Expires: ' . gmdate( "D, d M Y H:i:s", time() + $expires_offset ) . ' GMT');
 header("Cache-Control: public, max-age=$expires_offset");
 
-if ( $compress && ! ini_get('zlib.output_compression') && 'ob_gzhandler' != ini_get('output_handler') && isset($_SERVER['HTTP_ACCEPT_ENCODING']) ) {
-	header('Vary: Accept-Encoding'); // Handle proxies
-	if ( false !== stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate') && function_exists('gzdeflate') && ! $force_gzip ) {
-		header('Content-Encoding: deflate');
-		$out = gzdeflate( $out, 3 );
-	} elseif ( false !== stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') && function_exists('gzencode') ) {
-		header('Content-Encoding: gzip');
-		$out = gzencode( $out, 3 );
-	}
-}
-
 echo $out;
 exit;
diff --git a/src/wp-admin/load-styles.php b/src/wp-admin/load-styles.php
@@ -28,8 +28,6 @@
 if ( empty($load) )
 	exit;
 
-$compress = ( isset($_GET['c']) && $_GET['c'] );
-$force_gzip = ( $compress && 'gzip' == $_GET['c'] );
 $rtl = ( isset($_GET['dir']) && 'rtl' == $_GET['dir'] );
 $expires_offset = 31536000; // 1 year
 $out = '';
@@ -80,16 +78,5 @@
 header('Expires: ' . gmdate( "D, d M Y H:i:s", time() + $expires_offset ) . ' GMT');
 header("Cache-Control: public, max-age=$expires_offset");
 
-if ( $compress && ! ini_get('zlib.output_compression') && 'ob_gzhandler' != ini_get('output_handler') && isset($_SERVER['HTTP_ACCEPT_ENCODING']) ) {
-	header('Vary: Accept-Encoding'); // Handle proxies
-	if ( false !== stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'deflate') && function_exists('gzdeflate') && ! $force_gzip ) {
-		header('Content-Encoding: deflate');
-		$out = gzdeflate( $out, 3 );
-	} elseif ( false !== stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') && function_exists('gzencode') ) {
-		header('Content-Encoding: gzip');
-		$out = gzencode( $out, 3 );
-	}
-}
-
 echo $out;
 exit;
