diff --git a/fs/squashfs/Config.in b/fs/squashfs/Config.in
index 341e50a08c..0e8de2fd3a 100644
--- a/fs/squashfs/Config.in
+++ b/fs/squashfs/Config.in
@@ -89,4 +89,30 @@ config BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD
 
 endchoice
 
+config BR2_TARGET_ROOTFS_SQUASHFS_EXTREME_COMP
+	bool "extreme compression when available"
+	default y if BR2_TARGET_ROOTFS_SQUASHFS4_LZ4  # legacy
+	help
+	  Use options to increase compression ration as much as
+	  possible, like using architecture-specific options, at
+	  the cost of time when assembling the filesystem image.
+
+	  For example:
+	   - with gzip and lzo, use -Xcompression-level 9
+	   - with xz use arch-specific bcj (branch-call-jump) filters
+	   - with zstd use -Xcompression-level 22
+	   - and more
+
+config BR2_TARGET_ROOTFS_SQUASHFS_COMP_OPTS
+	string
+	default "-Xcompression-level 9" if BR2_TARGET_ROOTFS_SQUASHFS4_GZIP
+	default "-Xcompression-level 9" if BR2_TARGET_ROOTFS_SQUASHFS4_LZO
+	default "-Xhc" if BR2_TARGET_ROOTFS_SQUASHFS4_LZ4
+	default "-Xbcj arm,armthumb" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_arm || BR_aarch64)
+	default "-Xbcj powerpc" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_powerpc || BR2_powerpc64)
+	default "-Xbcj sparc" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_sparc || BR2_sparc64)
+	default "-Xbcj x86" if BR2_TARGET_ROOTFS_SQUASHFS4_XZ && (BR2_i386 || BR2_x86_64)
+	default "-Xcompression-level 22" if BR2_TARGET_ROOTFS_SQUASHFS4_ZSTD
+	depends on BR2_TARGET_ROOTFS_SQUASHFS_EXTREME_COMP
+
 endif
diff --git a/fs/squashfs/squashfs.mk b/fs/squashfs/squashfs.mk
index 2148bb4494..cf083663c1 100644
--- a/fs/squashfs/squashfs.mk
+++ b/fs/squashfs/squashfs.mk
@@ -9,14 +9,15 @@ ROOTFS_SQUASHFS_DEPENDENCIES = host-squashfs
 ROOTFS_SQUASHFS_ARGS = \
 	-noappend \
 	-processors $(PARALLEL_JOBS) \
-	-b $(call qstrip,$(BR2_TARGET_ROOTFS_SQUASHFS_BS))
+	-b $(call qstrip,$(BR2_TARGET_ROOTFS_SQUASHFS_BS)) \
+	$(call qstrip,$(BR2_TARGET_ROOTFS_SQUASHFS_COMP_OPTS))
 
 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS_PAD),)
 ROOTFS_SQUASHFS_ARGS += -nopad
 endif
 
 ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZ4),y)
-ROOTFS_SQUASHFS_ARGS += -comp lz4 -Xhc
+ROOTFS_SQUASHFS_ARGS += -comp lz4
 else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZO),y)
 ROOTFS_SQUASHFS_ARGS += -comp lzo
 else ifeq ($(BR2_TARGET_ROOTFS_SQUASHFS4_LZMA),y)