diff --git a/Cargo.lock b/Cargo.lock
index d6f3413..83c98a8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -99,12 +99,6 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
-[[package]]
-name = "anyhow"
-version = "1.0.72"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b13c32d80ecc7ab747b80c3784bce54ee8a7a0cc4fbda9bf4cda2cf6fe90854"
-
 [[package]]
 name = "async-trait"
 version = "0.1.72"
@@ -332,8 +326,8 @@ dependencies = [
 name = "digital-lsp"
 version = "0.0.1"
 dependencies = [
- "anyhow",
  "bincode",
+ "dirs-next",
  "flexi_logger",
  "log",
  "path-clean",
@@ -351,10 +345,8 @@ dependencies = [
  "tempdir",
  "tokio",
  "tower-lsp",
- "uuid",
  "vhdl_lang",
  "walkdir",
- "which",
 ]
 
 [[package]]
@@ -366,6 +358,16 @@ dependencies = [
  "dirs-sys",
 ]
 
+[[package]]
+name = "dirs-next"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b98cf8ebf19c3d1b223e151f99a4f9f0690dca41414773390fc824184ac833e1"
+dependencies = [
+ "cfg-if",
+ "dirs-sys-next",
+]
+
 [[package]]
 name = "dirs-sys"
 version = "0.4.1"
@@ -378,6 +380,17 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "dirs-sys-next"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
 [[package]]
 name = "dunce"
 version = "1.0.5"
@@ -416,16 +429,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
-[[package]]
-name = "errno"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a258e46cdc063eb8519c00b9fc845fc47bcfca4130e2f08e88665ceda8474245"
-dependencies = [
- "libc",
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "flexi_logger"
 version = "0.29.0"
@@ -603,15 +606,6 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
-[[package]]
-name = "home"
-version = "0.5.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3d1354bf6b7235cb4a0576c2619fd4ed18183f689b12b006a0ee7329eeff9a5"
-dependencies = [
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "httparse"
 version = "1.8.0"
@@ -713,12 +707,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "linux-raw-sys"
-version = "0.4.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
-
 [[package]]
 name = "lock_api"
 version = "0.4.10"
@@ -1171,19 +1159,6 @@ version = "0.1.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d626bb9dae77e28219937af045c257c28bfd3f69333c512553507f5f9798cb76"
 
-[[package]]
-name = "rustix"
-version = "0.38.30"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "322394588aaf33c24007e8bb3238ee3e4c5c09c084ab32bc73890b99ff326bca"
-dependencies = [
- "bitflags 2.4.2",
- "errno",
- "libc",
- "linux-raw-sys",
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "rustversion"
 version = "1.0.14"
@@ -1729,15 +1704,6 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
-[[package]]
-name = "uuid"
-version = "1.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81dfa00651efa65069b0b6b651f4aaa31ba9e3c3ce0137aaad053604ee7e0314"
-dependencies = [
- "getrandom",
-]
-
 [[package]]
 name = "vec_map"
 version = "0.8.2"
@@ -1849,19 +1815,6 @@ version = "0.2.87"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ca6ad05a4870b2bf5fe995117d3728437bd27d7cd5f06f13c17443ef369775a1"
 
-[[package]]
-name = "which"
-version = "6.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fa5e0c10bf77f44aac573e498d1a82d5fbd5e91f6fc0a99e7be4b38e85e101c"
-dependencies = [
- "either",
- "home",
- "once_cell",
- "rustix",
- "windows-sys 0.52.0",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/Cargo.toml b/Cargo.toml
index e204fc3..06f1401 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 [dependencies]
 sv-parser = { version = "0.13.3", path = "sv-parser/sv-parser"}
 vhdl_lang = { version = "^0.83.0", path = "rust_hdl/vhdl_lang" }
-uuid = { version = "1.0", features = ["v4"] }
+dirs-next = "2.0"
 bincode = "1.3"
 percent-encoding = "2.1.0"
 log = "0.4.19"
@@ -21,8 +21,6 @@ walkdir = "2.3.3"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 serde_yaml = "0.9.25"
-anyhow = "1.0.72"
-which = "6.0.0"
 regex = "1.9.1"
 structopt = "0.3.26"
 strum = "0.26.1"
diff --git a/src/core/cache_storage.rs b/src/core/cache_storage.rs
index 0cf70f8..4636c70 100644
--- a/src/core/cache_storage.rs
+++ b/src/core/cache_storage.rs
@@ -1,9 +1,10 @@
-use std::{collections::HashMap, fs::{self, File}, io::Read, path::PathBuf, str::FromStr, sync::{Arc, RwLock}};
+use core::hash;
+use std::{borrow::{Borrow, Cow}, collections::HashMap, fs::{self}, hash::{DefaultHasher, Hash, Hasher}, os::unix::thread, path::PathBuf, sync::{Arc, RwLock}};
 
 use log::info;
 use serde::{Deserialize, Serialize};
 
-use crate::utils::{file_size_in_kb, get_last_modified_time, k_deserialize};
+use crate::utils::{file_size_in_kb, get_last_modified_time, k_deserialize, k_serialize};
 
 use super::hdlparam::FastHdlparam;
 
@@ -16,7 +17,7 @@ pub enum CacheResult<T> {
     Error(String)    
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, Serialize, Deserialize, Clone)]
 pub struct CacheItem {
     /// 文件名字
     pub file_name: String,
@@ -40,11 +41,9 @@ pub struct CacheManager {
 }
 
 
-
 impl CacheManager {
-    pub fn new(root_dir: &str) -> Self {
+    pub fn new(root_dir: PathBuf) -> Self {
         // 读入 meta 文件
-        let root_dir = PathBuf::from_str(root_dir).unwrap();
         let meta_name = "index.cache";
         let meta_path = root_dir.join(meta_name);
         let meta = get_or_init_meta(&meta_path);
@@ -106,8 +105,45 @@ impl CacheManager {
         CacheResult::CacheNotFound
     }
 
-    pub fn update_cache() {
+    pub fn get_uuid_cache_name(&self, path_string: String) -> String {
+        // 采用 sip 哈希算法计算哈希
+        let mut hasher = DefaultHasher::new();
+        path_string.hash(&mut hasher);
+        let hash_value = hasher.finish();
+        let hash_string = format!("{:x}", hash_value);
+        let mut hash_string: String = hash_string.chars().take(32).collect();
+        hash_string.push_str(".cache");
+        hash_string
+    }
 
+    pub fn update_cache(&self, path: &PathBuf, fast: FastHdlparam) {
+        let path_string = path.to_str().unwrap();
+        let version = self.get_version(path);
+        let size = file_size_in_kb(path_string).unwrap();
+        let file_name = path.file_name().unwrap().to_str().unwrap().to_string();
+        let cache_name = self.get_uuid_cache_name(path_string.to_string());
+        let cache_item = CacheItem {
+            file_name,
+            version,
+            size,
+            cache_name: cache_name.clone()
+        };
+        
+        let mut meta_handle = self.meta.write().unwrap();
+        meta_handle.insert(path_string.to_string(), cache_item);
+        
+        // 准备必要的独立数据塞入线程进行调度
+        let meta = (&*meta_handle).clone();
+        let meta_save_path = self.root_dir.join(self.meta_name.clone());
+        let cache_save_path = self.root_dir.join(cache_name);
+        
+        std::thread::spawn(move || {
+            info!("save meta to {meta_save_path:?}");
+            k_serialize(&meta_save_path, meta);
+
+            info!("save index to {cache_save_path:?}");
+            k_serialize(&cache_save_path, fast);
+        });
     }
 
 }
diff --git a/src/core/sv_parser.rs b/src/core/sv_parser.rs
index c79e931..f1d4e30 100644
--- a/src/core/sv_parser.rs
+++ b/src/core/sv_parser.rs
@@ -2,7 +2,6 @@ use std::fs::{self, File};
 use std::io::BufRead;
 use std::io::BufReader;
 use std::path::PathBuf;
-use anyhow::Error;
 use regex::Regex;
 use ropey::Rope;
 use tower_lsp::lsp_types::Url;
@@ -38,7 +37,7 @@ pub fn sv_parser(path: &str) -> Option<FastHdlparam> {
     None
 }
 
-pub fn make_fast_from_syntaxtree(syntax_tree: &SyntaxTree, path: &PathBuf) -> Result<FastHdlparam, Error> {
+pub fn make_fast_from_syntaxtree(syntax_tree: &SyntaxTree, path: &PathBuf) -> Result<FastHdlparam, std::io::Error> {
     // 对不同操作系统文件路径的支持
     let path = to_escape_path(path);
 
diff --git a/src/hover/feature.rs b/src/hover/feature.rs
index 1e9ed94..58573b7 100644
--- a/src/hover/feature.rs
+++ b/src/hover/feature.rs
@@ -346,7 +346,7 @@ pub fn hover_module_declaration(
         let port_num = module.ports.len();
         let param_num = module.params.len();
         let instance_num = module.instances.len();
-        let port_desc = format!("`$(instance-param) ` {port_num}, `param` {param_num}, `instantiation` {instance_num}");
+        let port_desc = format!("`port` {port_num}, `param` {param_num}, `instantiation` {instance_num}");
 
         // 统计 dir
         let mut input_count = 0 as u32;
diff --git a/src/request/mod.rs b/src/request/mod.rs
index 9a365ae..bf4a1ff 100644
--- a/src/request/mod.rs
+++ b/src/request/mod.rs
@@ -11,6 +11,7 @@ use serde::{Deserialize, Serialize};
 use tower_lsp::jsonrpc::Result;
 use tower_lsp::lsp_types::*;
 
+use crate::core::cache_storage::CacheResult;
 use crate::core::hdlparam::FastHdlparam;
 use crate::core::sv_parser::make_fast_from_syntaxtree;
 
@@ -92,18 +93,50 @@ pub fn do_fast<'a>(path: String, backend: &Arc<Backend>) -> Result<FastHdlparam>
     info!("parse fast \"{}\"", path);
     
     let language_id = get_language_id_by_path_str(&path);
-    let res = match language_id.as_str() {
-        "vhdl" => do_vhdl_fast(&path, backend),
-        "verilog" | "systemverilog" => do_sv_fast(&path, backend),
-        _ => Err(tower_lsp::jsonrpc::Error {
-            code: tower_lsp::jsonrpc::ErrorCode::InvalidRequest,
-            message: Cow::Owned(format!("invalid file: {path}, expect vhdl, verilog or system verilog!")),
-            data: None
-        })
+
+    let parse_fast_by_language_id = |language_id: &str| {
+        match language_id {
+            "vhdl" => {
+                do_vhdl_fast(&path, backend)
+            }
+    
+            "verilog" | "systemverilog" => {
+                do_sv_fast(&path, backend)
+            }
+    
+            _ => Err(tower_lsp::jsonrpc::Error {
+                code: tower_lsp::jsonrpc::ErrorCode::InvalidRequest,
+                message: Cow::Owned(format!("invalid file: {path}, expect vhdl, verilog or system verilog!")),
+                data: None
+            })
+        }
     };
 
-    info!("finish parse");
-    res
+    let path_buf = PathBuf::from_str(&path).unwrap();
+    // 做缓存优化
+    let cache = &backend.server.cache;
+    match cache.try_get_fast_cache(&path_buf) {
+        // 找到缓存，直接返回
+        CacheResult::Ok(fast) => {
+            return Ok(fast);
+        }
+
+        // cache 没找到，那么就需要计算并存入
+        CacheResult::CacheNotFound => {
+            match parse_fast_by_language_id(&language_id) {
+                Ok(fast) => {
+                    cache.update_cache(&path_buf, fast.clone());
+                    return Ok(fast);
+                },
+                Err(err) => Err(err)
+            }
+        }
+
+        // 不需要缓存的文件正常进行 fast 计算即可
+        _ => {
+            parse_fast_by_language_id(&language_id)
+        }
+    }
 }
 
 fn do_sv_fast(path: &str, backend: &Arc<Backend>) -> Result<FastHdlparam> {
diff --git a/src/server.rs b/src/server.rs
index 3bdf3f6..94eb0e2 100644
--- a/src/server.rs
+++ b/src/server.rs
@@ -6,12 +6,13 @@ use flexi_logger::LoggerHandle;
 use log::{debug, info, warn};
 use serde::{Deserialize, Serialize};
 use std::string::ToString;
-use std::sync::{Arc, Mutex, RwLock};
+use std::sync::{Mutex, RwLock};
 use tower_lsp::jsonrpc::Result;
 use tower_lsp::lsp_types::*;
 use tower_lsp::{Client, LanguageServer};
 pub struct LSPServer {
     pub srcs: Sources,
+    pub cache: CacheManager,
     pub key_comps: Vec<CompletionItem>,
     pub sys_tasks: Vec<CompletionItem>,
     pub directives: Vec<CompletionItem>,
@@ -22,8 +23,11 @@ pub struct LSPServer {
 
 impl LSPServer {
     pub fn new(log_handle: Option<LoggerHandle>) -> LSPServer {
+        let user_home = dirs_next::home_dir().unwrap();
+        let dide_home = user_home.join(".digital-ide");
         LSPServer {
             srcs: Sources::new(),
+            cache: CacheManager::new(dide_home),
             key_comps: keyword_completions(KEYWORDS),
             sys_tasks: other_completions(SYS_TASKS),
             directives: other_completions(DIRECTIVES),
@@ -166,9 +170,8 @@ impl Default for VeribleFormat {
 
 #[tower_lsp::async_trait]
 impl LanguageServer for Backend {
-    async fn initialize(&self, params: InitializeParams) -> Result<InitializeResult> {
+    async fn initialize(&self, _: InitializeParams) -> Result<InitializeResult> {
         self.server.srcs.init();
-        // params.client_info.unwrap().name
 
         // 申明 LSP 的基本信息和提供的能力
         let server_info = Some(ServerInfo {
diff --git a/src/sources.rs b/src/sources.rs
index afad191..6fa3865 100644
--- a/src/sources.rs
+++ b/src/sources.rs
@@ -448,7 +448,7 @@ pub fn recovery_sv_parse(
                 return Some(syntax_tree);
             }
             Err(err) => {
-                println!("err: {err:?}");
+                // println!("err: {err:?}");
                 match err {
                     // 语法错误
                     sv_parser::Error::Parse(trace) => match trace {