Differences

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--- kernel-compression [2022/12/19 02:39] – snacsnoc
+++ kernel-compression [2022/12/19 05:10] (current) – snacsnoc
@@ Line 1: / Line 1: @@
-Kernel compression methods:
+The main difference between XZ compression and Gzip compression is in the compression algorithms they use. XZ compression is based on the LZMA2 algorithm, which is designed to achieve very high compression ratios. Gzip compression, on the other hand, uses the Deflate algorithm, which is designed to achieve better compression speeds.
+Another difference is that XZ compression is usually more efficient than Gzip in terms of file size when compressing larger files. This is because the XZ compression algorithm is designed to detect and store repeating patterns more efficiently. Gzip, on the other hand, is better suited for compressing smaller files, as the Deflate algorithm is faster and more efficient in these cases.
+Kernel compression methods and comparisons:
 GZIP, bzip2, LZMA, XZ, LZO,LZ4,ZSTD
+====== Size ======
   ls -s bzImage
@@ Line 10: / Line 16: @@
 arch/x86/boot/bzImage
 LZMA:
+arch/x86/boot/bzImage
+====== Compressing root build directory: ======
@@ Line 20: / Line 29: @@
   [easto@cupcake][/opt/snacklinux_rootfs]$ ls -s rootfs.gz
 rootfs.gz
+====== Speed: ======
+  [easto@cupcake][~/snacklinux]$ cd /opt/snacklinux_rootfs/; time find . -print | cpio -o -H newc --quiet | gzip > /home/easto/snacklinux/rootfs.gz
+  real    0m0.661s
+  user    0m0.607s
+  sys     0m0.052s
+  [easto@cupcake][/opt/snacklinux_rootfs]$ cd /opt/snacklinux_rootfs/; time find . -print | cpio -o -H newc --quiet | xz > /home/easto/snacklinux/rootfs.xz
+  real    0m4.697s
+  user    0m4.521s
+  sys     0m0.162s