Index: cnf/make.globals
===================================================================
--- cnf/make.globals	(revision 11418)
+++ cnf/make.globals	(revision 11419)
@@ -56,6 +56,9 @@
 # This option will be removed and forced to yes.
 AUTOCLEAN="yes"
 
+# Don't compress files with these suffixes.
+PORTAGE_COMPRESS_EXCLUDE_SUFFIXES="css gif htm[l]? jp[e]?g js pdf png"
+
 # Number of mirrors to try when a downloaded file has an incorrect checksum.
 PORTAGE_FETCH_CHECKSUM_TRY_MIRRORS="5"
 
Index: bin/ecompress
===================================================================
--- bin/ecompress	(revision 11418)
+++ bin/ecompress	(revision 11419)
@@ -63,6 +63,22 @@
 		exit 1
 		;;
 	*)
+		mask_ext_re=""
+		set -f
+		for x in $PORTAGE_COMPRESS_EXCLUDE_SUFFIXES ; do
+			mask_ext_re+="|$x"
+		done
+		set +f
+		mask_ext_re="^(${mask_ext_re:1})\$"
+		declare -a filtered_args=()
+		i=0
+		for x in "$@" ; do
+			[[ ${x##*.} =~ $mask_ext_re ]] && continue
+			filtered_args[$i]=$x
+			(( i++ ))
+		done
+		set "${filtered_args[@]}"
+
 		# If a compressed version of the file already exists, simply
 		# delete it so that the compressor doesn't whine (bzip2 will
 		# complain and skip, gzip will prompt for input)
Index: man/make.conf.5
===================================================================
--- man/make.conf.5	(revision 11418)
+++ man/make.conf.5	(revision 11419)
@@ -430,6 +430,13 @@
 \fBPORTAGE_COMPRESS_FLAGS\fR = \fI"\-9"\fR
 This variable contains flags for the \fBPORTAGE_COMPRESS\fR command.
 .TP
+.TP
+\fBPORTAGE_COMPRESS_EXCLUDE_SUFFIXES\fR = \fI"gif htm[l]? jp[e]?g pdf png"\fR
+This variable contains a space delimited list of file suffixes for which
+matching files are excluded when the \fBPORTAGE_COMPRESS\fR command is
+called. Regular expressions are supported and the match is performed only
+against the portion of the file name which follows the last period character.
+.TP
 .B PORTAGE_ELOG_CLASSES
 .TP
 .B PORTAGE_ELOG_SYSTEM