diff --git a/scripts/libs/core_tools.sh b/scripts/libs/core_tools.sh
index e2ed523b5..a0ea7e7f2 100644
--- a/scripts/libs/core_tools.sh
+++ b/scripts/libs/core_tools.sh
@@ -2,6 +2,20 @@
 
 [ -n "$(find --help 2>&1 | grep -o size)" ] && find_para=' -size +2000'             #find命令兼容
 
+#根据环境权衡决定是否把裸二进制存于$BINDIR(rom)——省RAM，前提是rom装得下
+#$1=裸二进制字节数。仅当$TMPDIR在内存(tmpfs)时裸存才省RAM；
+#再按$BINDIR文件系统估算裸二进制落盘体积(透明压缩fs约2:1)，需留有余量($raw_margin,默认8M)
+store_raw_worth_it(){
+    case "$(df -T "$TMPDIR" 2>/dev/null | awk 'END{print $2}')" in tmpfs|ramfs) ;; *) return 1 ;; esac
+    rom_free=$(df -k "$BINDIR" 2>/dev/null | awk 'END{print $4}')          #KB
+    [ -z "$rom_free" ] && return 1
+    case "$(df -T "$BINDIR" 2>/dev/null | awk 'END{print $2}')" in
+        squashfs|ubifs|overlay|overlayfs) est=$(( ${1:-0}/1024/2 )) ;;    #透明压缩，约2:1
+        *) est=$(( ${1:-0}/1024 )) ;;                                     #无压缩，全量
+    esac
+    [ $(( rom_free - est )) -gt "${raw_margin:-8192}" ] && return 0 || return 1
+}
+
 core_unzip() { #$1:需要解压的文件 $2:目标文件名
     if echo "$1" |grep -q 'tar.gz$' ;then
         [ "$BINDIR" = "$TMPDIR" ] && rm -rf "$TMPDIR"/CrashCore #小闪存模式防止空间不足
@@ -14,6 +28,8 @@ core_unzip() { #$1:需要解压的文件 $2:目标文件名
         rm -rf "$TMPDIR"/core_tmp
     elif echo "$1" |grep -q '.gz$' ;then
         gunzip -c "$1" > "$TMPDIR"/"$2"
+    elif echo "$1" |grep -q '.raw$' ;then
+        ln -sf "$1" "$TMPDIR"/"$2"
     elif echo "$1" |grep -q '.upx$' ;then
         ln -sf "$1" "$TMPDIR"/"$2"
     else
@@ -45,16 +61,20 @@ core_check(){
         rm -rf "$1" "$TMPDIR"/core_new
         return 2
     else
-        rm -f "$BINDIR"/CrashCore.tar.gz "$BINDIR"/CrashCore.gz "$BINDIR"/CrashCore.upx
-        if [ -z "$zip_type" ];then
+        rm -f "$BINDIR"/CrashCore.tar.gz "$BINDIR"/CrashCore.gz "$BINDIR"/CrashCore.upx "$BINDIR"/CrashCore.raw
+        if [ "$zip_type" = 'upx' ];then
+            mv -f "$1" "$BINDIR/CrashCore.upx"
+            rm -f "$TMPDIR"/core_new
+            ln -sf "$BINDIR/CrashCore.upx" "$TMPDIR/CrashCore"
+        elif store_raw_worth_it "$(wc -c < "$TMPDIR/core_new")" ;then
+            rm -f "$1"
+            mv -f "$TMPDIR/core_new" "$BINDIR/CrashCore.raw"
+            ln -sf "$BINDIR/CrashCore.raw" "$TMPDIR/CrashCore"
+        elif [ -z "$zip_type" ];then
             gzip -c "$TMPDIR/core_new" > "$BINDIR/CrashCore.gz"
+            mv -f "$TMPDIR/core_new" "$TMPDIR/CrashCore"
         else
             mv -f "$1" "$BINDIR/CrashCore.$zip_type"
-        fi
-        if [ "$zip_type" = 'upx' ];then
-            rm -f "$1" "$TMPDIR"/core_new
-            ln -sf "$TMPDIR/CrashCore.upx" "$TMPDIR/CrashCore"
-        else
             mv -f "$TMPDIR/core_new" "$TMPDIR/CrashCore"
         fi
         core_v="$v"
@@ -70,6 +90,8 @@ core_webget(){
     . "$CRASHDIR"/libs/check_target.sh
     if [ -z "$custcorelink" ];then
         [ -z "$zip_type" ] && zip_type='tar.gz'
+        #若环境适合裸存(见store_raw_worth_it，按典型核心~45M估算)，避免下载upx，改取tar.gz的裸二进制
+        [ "$zip_type" = 'upx' ] && store_raw_worth_it 47185920 && zip_type='tar.gz'
         get_bin "$TMPDIR/Coretmp.$zip_type" "bin/$crashcore/${target}-linux-${cpucore}.$zip_type"
     else
         case "$custcorelink" in