feature/compress: attempt to detect and use the number of physical CPU cores

Signed-off-by: Alexey Gladkov <[email protected]>

Author: legionus

features/compress/bin/compress-image

@@ -8,10 +8,10 @@ case "$compress_method" in
 	gzip|gz)   set -- gzip --best  ;;
 	bzip2|bz2) set -- bzip2 --best ;;
 	lz4)       set -- lz4 --best   ;;
-	lzma)      set -- lzma --best  ;;
+	lzma)      set -- lzma --best -T0 ;;
 	lzo)       set -- lzop --best  ;;
-	xz)        set -- xz --best --check=crc32 ;;
-	zstd)      set -- zstd -19 ;;
+	xz)        set -- xz --best --check=crc32 -T0 ;;
+	zstd)      set -- zstd -19 -T0 ;;
 	'')        exit 0              ;;
 	*) fatal "Unknown compress method: $compress_method"
 esac