diff --git a/cssconcat.php b/cssconcat.php
index 24b21e8..3907c7f 100644
--- a/cssconcat.php
+++ b/cssconcat.php
@@ -10,8 +10,9 @@
 
 require_once( dirname( __FILE__ ) . '/concat-utils.php' );
 
-if ( ! defined( 'ALLOW_GZIP_COMPRESSION' ) )
+if ( ! defined( 'ALLOW_GZIP_COMPRESSION' ) ) {
 	define( 'ALLOW_GZIP_COMPRESSION', true );
+}
 
 class WPcom_CSS_Concat extends WP_Styles {
 	private $old_styles;
@@ -62,40 +63,57 @@ function do_items( $handles = false, $group = false ) {
 			$do_concat = false;
 
 			// Only try to concat static css files
-			if ( false !== strpos( $css_url_parsed['path'], '.css' ) )
+			if ( false !== strpos( $css_url_parsed['path'], '.css' ) ) {
 				$do_concat = true;
+			}
 
 			// Don't try to concat styles which are loaded conditionally (like IE stuff)
-			if ( isset( $extra['conditional'] ) )
+			if ( isset( $extra['conditional'] ) ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[css] Skipped: %s. Reason: is conditional', $css_url ) );
 				$do_concat = false;
+			}
 
 			// Don't concat rtl stuff for now until concat supports it correctly
-			if ( 'rtl' === $this->text_direction && ! empty( $extra['rtl'] ) )
+			if ( 'rtl' === $this->text_direction && ! empty( $extra['rtl'] ) ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[css] Skipped: %s. Reason: is rtl', $css_url ) );
 				$do_concat = false;
+			}
 
 			// Don't try to concat externally hosted scripts
 			$is_internal_url = WPCOM_Concat_Utils::is_internal_url( $css_url, $siteurl );
 			if ( ! $is_internal_url ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[css] Skipped: %s. Reason: not internal url', $css_url ) );
 				$do_concat = false;
 			}
 
 			// Concat and canonicalize the paths only for
 			// existing scripts that aren't outside ABSPATH
 			$css_realpath = WPCOM_Concat_Utils::realpath( $css_url, $siteurl );
-			if ( ! $css_realpath || 0 !== strpos( $css_realpath, ABSPATH ) )
+			if ( ! $css_realpath || 0 !== strpos( $css_realpath, ABSPATH ) ) {
+				if ( $css_url ) {
+					// check for url reduces noise of inline styles
+					do_action( 'qm/vip_concat_info', sprintf( '[css] Skipped: %s. Reason: outside ABSPATH', $css_url ) );
+				}
 				$do_concat = false;
-			else
+			} else {
 				$css_url_parsed['path'] = substr( $css_realpath, strlen( ABSPATH ) - 1 );
+			}
 
 			// Allow plugins to disable concatenation of certain stylesheets.
-			$do_concat = apply_filters( 'css_do_concat', $do_concat, $handle );
+			$do_concat_after = apply_filters( 'css_do_concat', $do_concat, $handle );
+			if ( $do_concat && ! $do_concat_after ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[css] Skipped: %s. Reason: filtered', $css_url ) );
+			}
+			$do_concat = $do_concat_after;
 
 			if ( true === $do_concat ) {
 				$media = $obj->args;
-				if( empty( $media ) )
+				if ( empty( $media ) ) {
 					$media = 'all';
-				if ( ! isset( $stylesheets[ $stylesheet_group_index ] ) || ( isset( $stylesheets[ $stylesheet_group_index ] ) && ! is_array( $stylesheets[ $stylesheet_group_index ] ) ) )
+				}
+				if ( ! isset( $stylesheets[ $stylesheet_group_index ] ) || ( isset( $stylesheets[ $stylesheet_group_index ] ) && ! is_array( $stylesheets[ $stylesheet_group_index ] ) ) ) {
 					$stylesheets[ $stylesheet_group_index ] = array();
+				}
 
 				$stylesheets[ $stylesheet_group_index ][ $media ][ $handle ] = $css_url_parsed['path'];
 				$this->done[] = $handle;
@@ -112,8 +130,9 @@ function do_items( $handles = false, $group = false ) {
 				if ( 'noconcat' == $media ) {
 
 					foreach( $css as $handle ) {
-						if ( $this->do_item( $handle, $group ) )
+						if ( $this->do_item( $handle, $group ) ) {
 							$this->done[] = $handle;
+						}
 					}
 					continue;
 				} elseif ( count( $css ) > 1) {
@@ -123,12 +142,21 @@ function do_items( $handles = false, $group = false ) {
 
 					if ( $this->allow_gzip_compression ) {
 						$path_64 = base64_encode( gzcompress( $path_str ) );
-						if ( strlen( $path_str ) > ( strlen( $path_64 ) + 1 ) )
+						if ( strlen( $path_str ) > ( strlen( $path_64 ) + 1 ) ) {
 							$path_str = '-' . $path_64;
+						}
+					}
+
+					$count = count( $paths );
+					if ( $count > 150 ) {
+						do_action( 'qm/vip_concat_warn', sprintf( '[css] TOO LARGE Bundle %s contains %d items: %s', $path_str, $count, "\n" . implode("\n", $paths ) ) );
+					} else {
+						do_action( 'qm/vip_concat_info', sprintf( '[css] Bundle %s contains %d items: %s', $path_str, $count, "\n" . implode("\n", $paths ) ) );
 					}
 
 					$href = $siteurl . "/_static/??" . $path_str;
 				} else {
+					do_action( 'qm/vip_concat_info', sprintf( '[css] Skipped: %s. Reason: lonely (nothing to concatenate with)', implode( $css ) ) );
 					$href = $this->cache_bust_mtime( $siteurl . current( $css ), $siteurl );
 				}
 
@@ -141,28 +169,33 @@ function do_items( $handles = false, $group = false ) {
 	}
 
 	function cache_bust_mtime( $url, $siteurl ) {
-		if ( strpos( $url, '?m=' ) )
+		if ( strpos( $url, '?m=' ) ) {
 			return $url;
+		}
 
 		$parts = parse_url( $url );
-		if ( ! isset( $parts['path'] ) || empty( $parts['path'] ) )
+		if ( ! isset( $parts['path'] ) || empty( $parts['path'] ) ) {
 			return $url;
+		}
 
 		$file = WPCOM_Concat_Utils::realpath( $url, $siteurl );
 
 		$mtime = false;
-		if ( file_exists( $file ) )
+		if ( file_exists( $file ) ) {
 			$mtime = filemtime( $file );
+		}
 
-		if ( ! $mtime )
+		if ( ! $mtime ) {
 			return $url;
+		}
 
 		if ( false === strpos( $url, '?' ) ) {
 			$q = '';
 		} else {
 			list( $url, $q ) = explode( '?', $url, 2 );
-			if ( strlen( $q ) )
+			if ( strlen( $q ) ) {
 				$q = '&' . $q;
+			}
 		}
 
 		return "$url?m={$mtime}g{$q}";
@@ -193,3 +226,4 @@ function css_concat_init() {
 }
 
 add_action( 'init', 'css_concat_init' );
+
diff --git a/jsconcat.php b/jsconcat.php
index ab6d5b1..64b9431 100644
--- a/jsconcat.php
+++ b/jsconcat.php
@@ -10,8 +10,9 @@
 
 require_once( dirname( __FILE__ ) . '/concat-utils.php' );
 
-if ( ! defined( 'ALLOW_GZIP_COMPRESSION' ) )
+if ( ! defined( 'ALLOW_GZIP_COMPRESSION' ) ) {
 	define( 'ALLOW_GZIP_COMPRESSION', true );
+}
 
 class WPcom_JS_Concat extends WP_Scripts {
 	private $old_scripts;
@@ -64,8 +65,9 @@ function do_items( $handles = false, $group = false ) {
 		$level = 0;
 
 		foreach( $this->to_do as $key => $handle ) {
-			if ( in_array( $handle, $this->done ) || !isset( $this->registered[$handle] ) )
+			if ( in_array( $handle, $this->done ) || !isset( $this->registered[$handle] ) ) {
 				continue;
+			}
 
 			if ( 0 === $group && $this->groups[$handle] > 0 ) {
 				$this->in_footer[] = $handle;
@@ -81,8 +83,9 @@ function do_items( $handles = false, $group = false ) {
 				continue;
 			}
 
-			if ( false === $group && in_array( $handle, $this->in_footer, true ) )
+			if ( false === $group && in_array( $handle, $this->in_footer, true ) ) {
 				$this->in_footer = array_diff( $this->in_footer, (array) $handle );
+			}
 
 			$obj = $this->registered[$handle];
 			$js_url = $obj->src;
@@ -93,24 +96,29 @@ function do_items( $handles = false, $group = false ) {
 			$do_concat = false;
 
 			// Only try to concat static js files
-			if ( false !== strpos( $js_url_parsed['path'], '.js' ) )
+			if ( false !== strpos( $js_url_parsed['path'], '.js' ) ) {
 				$do_concat = true;
+			}
 
 			// Don't try to concat externally hosted scripts
 			$is_internal_url = WPCOM_Concat_Utils::is_internal_url( $js_url, $siteurl );
 			if ( ! $is_internal_url ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[js] Skipped: %s. Reason: not internal URL', $js_url ) );
 				$do_concat = false;
 			}
 
 			// Concat and canonicalize the paths only for
 			// existing scripts that aren't outside ABSPATH
 			$js_realpath = WPCOM_Concat_Utils::realpath( $js_url, $siteurl );
-			if ( ! $js_realpath || 0 !== strpos( $js_realpath, ABSPATH ) )
+			if ( ! $js_realpath || 0 !== strpos( $js_realpath, ABSPATH ) ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[js] Skipped: %s. Reason: outside ABSPATH', $js_url ) );
 				$do_concat = false;
-			else
+			} else {
 				$js_url_parsed['path'] = substr( $js_realpath, strlen( ABSPATH ) - 1 );
+			}
 
 			if ( $this->has_inline_content( $handle ) ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[js] Skipped: %s. Reason: has inline content', $js_url ) );
 				$do_concat = false;
 			}
 
@@ -120,11 +128,16 @@ function do_items( $handles = false, $group = false ) {
 			}
 
 			// Allow plugins to disable concatenation of certain scripts.
-			$do_concat = apply_filters( 'js_do_concat', $do_concat, $handle );
+			$do_concat_after = apply_filters( 'js_do_concat', $do_concat, $handle );
+			if ( $do_concat && ! $do_concat_after ) {
+				do_action( 'qm/vip_concat_info', sprintf( '[js] Skipped: %s. Reason: filtered', $js_url ) );
+			}
+			$do_concat = $do_concat_after;
 
 			if ( true === $do_concat ) {
-				if ( !isset( $javascripts[$level] ) )
+				if ( !isset( $javascripts[$level] ) ) {
 					$javascripts[$level]['type'] = 'concat';
+				}
 
 				$javascripts[$level]['paths'][] = $js_url_parsed['path'];
 				$javascripts[$level]['handles'][] = $handle;
@@ -138,13 +151,15 @@ function do_items( $handles = false, $group = false ) {
 			unset( $this->to_do[$key] );
 		}
 
-		if ( empty( $javascripts ) )
+		if ( empty( $javascripts ) ) {
 			return $this->done;
+		}
 
 		foreach ( $javascripts as $js_array ) {
 			if ( 'do_item' == $js_array['type'] ) {
-				if ( $this->do_item( $js_array['handle'], $group ) )
+				if ( $this->do_item( $js_array['handle'], $group ) ) {
 					$this->done[] = $js_array['handle'];
+				}
 			} else if ( 'concat' == $js_array['type'] ) {
 				array_map( array( $this, 'print_extra_script' ), $js_array['handles'] );
 
@@ -159,8 +174,16 @@ function do_items( $handles = false, $group = false ) {
 							$path_str = '-' . $path_64;
 					}
 
+					$count = count( $paths );
+					if ( $count > 150 ) {
+						do_action( 'qm/vip_concat_warn', sprintf( '[js] TOO LARGE Bundle %s contains %d items: %s', $path_str, $count, "\n" . implode("\n", $paths ) ) );
+					} else {
+						do_action( 'qm/vip_concat_info', sprintf( '[js] Bundle %s contains %d items: %s', $path_str, $count, "\n" . implode("\n", $paths ) ) );
+					}
+
 					$href = $siteurl . "/_static/??" . $path_str;
 				} elseif ( isset( $js_array['paths'] ) && is_array( $js_array['paths'] ) ) {
+					do_action( 'qm/vip_concat_info', sprintf( '[js] Skipped: %s. Reason: lonely (nothing to concatenate with)', implode( $js_array['paths'] ) ) );
 					$href = $this->cache_bust_mtime( $siteurl . $js_array['paths'][0], $siteurl );
 				}
 
@@ -219,28 +242,33 @@ function do_items( $handles = false, $group = false ) {
 	}
 
 	function cache_bust_mtime( $url, $siteurl ) {
-		if ( strpos( $url, '?m=' ) )
+		if ( strpos( $url, '?m=' ) ) {
 			return $url;
+		}
 
 		$parts = parse_url( $url );
-		if ( ! isset( $parts['path'] ) || empty( $parts['path'] ) )
+		if ( ! isset( $parts['path'] ) || empty( $parts['path'] ) ) {
 			return $url;
+		}
 
 		$file = WPCOM_Concat_Utils::realpath( $url, $siteurl );
 
 		$mtime = false;
-		if ( file_exists( $file ) )
+		if ( file_exists( $file ) ) {
 			$mtime = filemtime( $file );
+		}
 
-		if ( ! $mtime )
+		if ( ! $mtime ) {
 			return $url;
+		}
 
 		if ( false === strpos( $url, '?' ) ) {
 			$q = '';
 		} else {
 			list( $url, $q ) = explode( '?', $url, 2 );
-			if ( strlen( $q ) )
+			if ( strlen( $q ) ) {
 				$q = '&' . $q;
+			}
 		}
 
 		return "$url?m={$mtime}g{$q}";
diff --git a/ngx-http-concat.php b/ngx-http-concat.php
index 851f06c..4692478 100644
--- a/ngx-http-concat.php
+++ b/ngx-http-concat.php
@@ -60,8 +60,9 @@ function concat_get_mtype( $file ) {
 	global $concat_types;
 
 	$lastdot_pos = strrpos( $file, '.' );
-	if ( false === $lastdot_pos )
+	if ( false === $lastdot_pos ) {
 		return false;
+	}
 
 	$ext = substr( $file, $lastdot_pos + 1 );
 
@@ -69,25 +70,29 @@ function concat_get_mtype( $file ) {
 }
 
 function concat_get_path( $uri ) {
-	if ( ! strlen( $uri ) )
+	if ( ! strlen( $uri ) ) {
 		concat_http_status_exit( 400 );
+	}
 
-	if ( false !== strpos( $uri, '..' ) || false !== strpos( $uri, "\0" ) )
+	if ( false !== strpos( $uri, '..' ) || false !== strpos( $uri, "\0" ) ) {
 		concat_http_status_exit( 400 );
+	}
 
 	return CONCAT_FILES_ROOT . ( '/' != $uri[0] ? '/' : '' ) . $uri;
 }
 
 /* Main() */
-if ( !in_array( $_SERVER['REQUEST_METHOD'], array( 'GET', 'HEAD' ) ) )
+if ( !in_array( $_SERVER['REQUEST_METHOD'], array( 'GET', 'HEAD' ) ) ) {
 	concat_http_status_exit( 400 );
+}
 
 // /_static/??/foo/bar.css,/foo1/bar/baz.css?m=293847g
 // or
 // /_static/??-eJzTT8vP109KLNJLLi7W0QdyDEE8IK4CiVjn2hpZGluYmKcDABRMDPM=
 $args = parse_url($_SERVER['REQUEST_URI'], PHP_URL_QUERY );
-if ( ! $args || false === strpos( $args, '?' ) )
+if ( ! $args || false === strpos( $args, '?' ) ) {
 	concat_http_status_exit( 400 );
+}
 
 $args = substr( $args, strpos( $args, '?' ) + 1 );
 
@@ -105,17 +110,20 @@ function concat_get_path( $uri ) {
 
 // /foo/bar.css,/foo1/bar/baz.css?m=293847g
 $version_string_pos = strpos( $args, '?' );
-if ( false !== $version_string_pos )
+if ( false !== $version_string_pos ) {
 	$args = substr( $args, 0, $version_string_pos );
+}
 
 // /foo/bar.css,/foo1/bar/baz.css
 $args = explode( ',', $args );
-if ( ! $args )
+if ( ! $args ) {
 	concat_http_status_exit( 400 );
+}
 
 // array( '/foo/bar.css', '/foo1/bar/baz.css' )
-if ( 0 == count( $args ) || count( $args ) > $concat_max_files )
+if ( 0 == count( $args ) || count( $args ) > $concat_max_files ) {
 	concat_http_status_exit( 400 );
+}
 
 // If we're in a subdirectory context, use that as the root.
 // We can't assume that the root serves the same content as the subdir.
@@ -136,31 +144,38 @@ function concat_get_path( $uri ) {
 foreach ( $args as $uri ) {
 	$fullpath = concat_get_path( $uri );
 
-	if ( ! file_exists( $fullpath ) )
+	if ( ! file_exists( $fullpath ) ) {
 		concat_http_status_exit( 404 );
+	}
 
 	$mime_type = concat_get_mtype( $fullpath );
-	if ( ! in_array( $mime_type, $concat_types ) )
+	if ( ! in_array( $mime_type, $concat_types ) ) {
 		concat_http_status_exit( 400 );
+	}
 
 	if ( $concat_unique ) {
-		if ( ! isset( $last_mime_type ) )
+		if ( ! isset( $last_mime_type ) ) {
 			$last_mime_type = $mime_type;
+		}
 
-		if ( $last_mime_type != $mime_type )
+		if ( $last_mime_type != $mime_type ) {
 			concat_http_status_exit( 400 );
+		}
 	}
 
 	$stat = stat( $fullpath );
-	if ( false === $stat )
+	if ( false === $stat ) {
 		concat_http_status_exit( 500 );
+	}
 
-	if ( $stat['mtime'] > $last_modified )
+	if ( $stat['mtime'] > $last_modified ) {
 		$last_modified = $stat['mtime'];
+	}
 
 	$buf = file_get_contents( $fullpath );
-	if ( false === $buf )
+	if ( false === $buf ) {
 		concat_http_status_exit( 500 );
+	}
 
 	if ( 'text/css' == $mime_type ) {
 		$dirpath = $subdir_path_prefix . dirname( $uri );
@@ -201,11 +216,12 @@ function ( $match ) {
 				function ( $match ) use ( $dirpath ) {
 					global $pre_output;
 
-					if ( 0 !== strpos( $match['path'], 'http' ) && '/' != $match['path'][0] )
+					if ( 0 !== strpos( $match['path'], 'http' ) && '/' != $match['path'][0] ) {
 						$pre_output .= $match['pre_path'] . ( $dirpath == '/' ? '/' : $dirpath . '/' ) .
 							$match['path'] . $match['post_path'] . "\n";
-					else
+					} else {
 						$pre_output .= $match[0] . "\n";
+					}
 
 					return '';
 				},
@@ -216,10 +232,11 @@ function ( $match ) use ( $dirpath ) {
 		$buf = $css_minify->run( $buf );
 	}
 
-	if ( 'application/javascript' == $mime_type )
+	if ( 'application/javascript' == $mime_type ) {
 		$output .= "$buf;\n";
-	else
+	} else {
 		$output .= "$buf";
+	}
 }
 
 header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s', $last_modified ) . ' GMT' );