diff --git a/Cargo.lock b/Cargo.lock
index 466edcdda..732851fa4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -13,6 +13,12 @@ dependencies = [
  "rsdp",
 ]
 
+[[package]]
+name = "adler32"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aae1277d39aeec15cb388266ecc24b11c80469deae6067e17a1a7aa9e5c1f234"
+
 [[package]]
 name = "ahash"
 version = "0.8.2"
@@ -156,6 +162,15 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "core2"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b49ba7ef1ad6107f8824dbe97de947cbaac53c44e7f9756a1fba0d37c1eec505"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "cpio-decoder"
 version = "0.1.0"
@@ -163,6 +178,15 @@ dependencies = [
  "int-to-c-enum",
 ]
 
+[[package]]
+name = "crc32fast"
+version = "1.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "critical-section"
 version = "1.1.1"
@@ -538,6 +562,7 @@ dependencies = [
  "ascii",
  "bitflags",
  "controlled",
+ "core2",
  "cpio-decoder",
  "int-to-c-enum",
  "intrusive-collections",
@@ -551,6 +576,7 @@ dependencies = [
  "jinux-util",
  "keyable-arc",
  "lazy_static",
+ "libflate",
  "log",
  "lru",
  "pod",
@@ -628,6 +654,27 @@ version = "0.2.137"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc7fcc620a3bff7cdd7a365be3376c97191aeaccc2a603e600951e452615bf89"
 
+[[package]]
+name = "libflate"
+version = "1.4.0"
+source = "git+https://github.com/jinzhao-dev/libflate?rev=b781da6#b781da6b6841e380f4cfa3529d5070afad56ea32"
+dependencies = [
+ "adler32",
+ "core2",
+ "crc32fast",
+ "libflate_lz77",
+]
+
+[[package]]
+name = "libflate_lz77"
+version = "1.2.0"
+source = "git+https://github.com/jinzhao-dev/libflate?rev=b781da6#b781da6b6841e380f4cfa3529d5070afad56ea32"
+dependencies = [
+ "core2",
+ "hashbrown 0.13.1",
+ "rle-decode-fast",
+]
+
 [[package]]
 name = "limine"
 version = "0.1.10"
@@ -776,6 +823,12 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "rle-decode-fast"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3582f63211428f83597b51b2ddb88e2a91a9d52d12831f9d08f5e624e8977422"
+
 [[package]]
 name = "rsdp"
 version = "2.0.0"
diff --git a/boot/limine/conf/limine.cfg b/boot/limine/conf/limine.cfg
index 228216bf3..f28e96fb6 100644
--- a/boot/limine/conf/limine.cfg
+++ b/boot/limine/conf/limine.cfg
@@ -15,4 +15,4 @@ PROTOCOL=limine
 # so change this path if you change that.
 KERNEL_PATH=boot:///jinux
 # The path to the module
-MODULE_PATH=boot:///ramdisk.cpio
\ No newline at end of file
+MODULE_PATH=boot:///ramdisk.cpio.gz
\ No newline at end of file
diff --git a/boot/limine/scripts/limine-build.sh b/boot/limine/scripts/limine-build.sh
index 0c3c14582..e0c58137c 100755
--- a/boot/limine/scripts/limine-build.sh
+++ b/boot/limine/scripts/limine-build.sh
@@ -25,7 +25,7 @@ cp target/limine/limine-cd.bin target/iso_root
 cp target/limine/limine-cd-efi.bin target/iso_root
 
 # Copy ramdisk
-cp regression/build/ramdisk.cpio target/iso_root
+cp regression/build/ramdisk.cpio.gz target/iso_root
 
 xorriso -as mkisofs                                             \
     -b limine-cd.bin                                            \
diff --git a/framework/jinux-frame/src/config.rs b/framework/jinux-frame/src/config.rs
index 9c6985dcc..18b052159 100644
--- a/framework/jinux-frame/src/config.rs
+++ b/framework/jinux-frame/src/config.rs
@@ -4,7 +4,7 @@ use log::Level;
 
 pub const USER_STACK_SIZE: usize = PAGE_SIZE * 4;
 pub const KERNEL_STACK_SIZE: usize = PAGE_SIZE * 64;
-pub const KERNEL_HEAP_SIZE: usize = 0x2_000_000;
+pub const KERNEL_HEAP_SIZE: usize = 0x4_000_000;
 
 pub const KERNEL_OFFSET: usize = 0xffffffff80000000;
 
diff --git a/regression/Makefile b/regression/Makefile
index d07c8ab1c..8a2fda7cd 100644
--- a/regression/Makefile
+++ b/regression/Makefile
@@ -2,7 +2,7 @@ MKFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
 CUR_DIR := $(patsubst %/,%,$(dir $(MKFILE_PATH)))
 BUILD_DIR := $(CUR_DIR)/build
 INITRAMFS := $(BUILD_DIR)/initramfs
-RAMDISK := $(BUILD_DIR)/ramdisk.cpio
+RAMDISK := $(BUILD_DIR)/ramdisk.cpio.gz
 SHELL := /bin/bash
 
 ifneq (, $(wildcard $(INITRAMFS)/. ))
@@ -37,7 +37,7 @@ endif
 
 $(RAMDISK): $(INITRAMFS) $(INITRAMFS_DIRS) $(INITRAMFS_FILES)
 	@echo "Generating the ramdisk image..."
-	@(cd $(INITRAMFS); find . | cpio -o -H newc) > $@
+	@(cd $(INITRAMFS); find . | cpio -o -H newc | gzip) > $@
 
 build: $(RAMDISK)
 
diff --git a/services/libs/jinux-std/Cargo.toml b/services/libs/jinux-std/Cargo.toml
index 4f07bc337..c871c4e18 100644
--- a/services/libs/jinux-std/Cargo.toml
+++ b/services/libs/jinux-std/Cargo.toml
@@ -34,6 +34,9 @@ xmas-elf = "0.8.0"
 bitflags = "1.3"
 ringbuf = { version = "0.3.2", default-features = false, features = ["alloc"] }
 keyable-arc = { path = "../keyable-arc" }
+# unzip initramfs
+libflate = { git = "https://github.com/jinzhao-dev/libflate", rev = "b781da6", features = ["no_std"] }
+core2 = { version = "0.4", default_features = false, features = ["alloc"] }
 
 spin = "0.9.4"
 vte = "0.10"
diff --git a/services/libs/jinux-std/src/fs/initramfs.rs b/services/libs/jinux-std/src/fs/initramfs.rs
index 430a41889..7721f7efe 100644
--- a/services/libs/jinux-std/src/fs/initramfs.rs
+++ b/services/libs/jinux-std/src/fs/initramfs.rs
@@ -2,11 +2,16 @@ use crate::prelude::*;
 
 use super::fs_resolver::{FsPath, FsResolver};
 use super::utils::{InodeMode, InodeType};
+use core2::io::Read;
 use cpio_decoder::{CpioDecoder, FileType};
+use libflate::gzip::Decoder as GZipDecoder;
 
 /// Unpack and prepare the fs from the ramdisk CPIO buffer.
 pub fn init(ramdisk_buf: &[u8]) -> Result<()> {
-    let decoder = CpioDecoder::new(ramdisk_buf);
+    println!("[kernel] unzipping ramdisk.cpio.gz ...");
+    let unzipped_ramdisk_buf = unzip(ramdisk_buf)?;
+    println!("[kernel] unzip ramdisk.cpio.gz done");
+    let decoder = CpioDecoder::new(&unzipped_ramdisk_buf);
     let fs = FsResolver::new();
     for entry_result in decoder.decode_entries() {
         let entry = entry_result?;
@@ -50,6 +55,17 @@ pub fn init(ramdisk_buf: &[u8]) -> Result<()> {
             }
         }
     }
+    println!("[kernel] initramfs is ready");
 
     Ok(())
 }
+
+fn unzip(buf: &[u8]) -> Result<Vec<u8>> {
+    let mut decoder = GZipDecoder::new(buf)
+        .map_err(|_| Error::with_message(Errno::EINVAL, "invalid gzip buffer"))?;
+    let mut unzipped_buf = Vec::new();
+    decoder
+        .read_to_end(&mut unzipped_buf)
+        .map_err(|_| Error::with_message(Errno::EINVAL, "invalid gzip buffer"))?;
+    Ok(unzipped_buf)
+}