diff --git a/Cargo.lock b/Cargo.lock
index ea6f002..3f89401 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,18 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ahash"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91429305e9f0a25f6205c5b8e0d2db09e0708a7a6df0f42212bb56c32c8ac97a"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+ "zerocopy",
+]
+
 [[package]]
 name = "aho-corasick"
 version = "1.1.2"
@@ -11,6 +23,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "allocator-api2"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0942ffc6dcaadf03badf6e6a2d0228460359d5e34b57ccdc720b7382dfbd5ec5"
+
 [[package]]
 name = "anstream"
 version = "0.6.4"
@@ -250,7 +268,7 @@ dependencies = [
 
 [[package]]
 name = "dotree"
-version = "0.5.0"
+version = "0.5.1"
 dependencies = [
  "anyhow",
  "clap",
@@ -258,6 +276,7 @@ dependencies = [
  "ctrlc",
  "dirs",
  "exec",
+ "hashbrown",
  "k9",
  "log",
  "once_cell",
@@ -375,6 +394,16 @@ dependencies = [
  "wasi",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f93e7192158dbcda357bdec5fb5788eebf8bbac027f3f33e719d29135ae84156"
+dependencies = [
+ "ahash",
+ "allocator-api2",
+]
+
 [[package]]
 name = "heck"
 version = "0.4.1"
@@ -989,3 +1018,23 @@ name = "windows_x86_64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "zerocopy"
+version = "0.7.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cd369a67c0edfef15010f980c3cbe45d7f651deac2cd67ce097cd801de16557"
+dependencies = [
+ "zerocopy-derive",
+]
+
+[[package]]
+name = "zerocopy-derive"
+version = "0.7.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2f140bda219a26ccc0cdb03dba58af72590c53b22642577d88a927bc5c87d6b"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.38",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 03ccc4c..bb30c89 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dotree"
-version = "0.5.0"
+version = "0.5.1"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
@@ -19,6 +19,7 @@ clap = { version = "4.4.6", features = ["derive"] }
 console = "0.15.7"
 ctrlc = "3.4.1"
 dirs = "5.0.1"
+hashbrown = "0.14.2"
 log = "0.4.20"
 once_cell = "1.18.0"
 pest = "2.7.4"
diff --git a/mk-release.bash b/mk-release.bash
index 58921ff..3a4a6a4 100755
--- a/mk-release.bash
+++ b/mk-release.bash
@@ -6,10 +6,12 @@ pkg_id="$(cargo pkgid)"
 tag=${pkg_id##*#}
 
 cargo test
+
 cargo build --release --target=x86_64-unknown-linux-musl
 strip target/x86_64-unknown-linux-musl/release/dt
 
 cargo build --release --target=x86_64-pc-windows-gnu
+strip target/x86_64-pc-windows-gnu/release/dt.exe
 
 gh release create "$tag"\
   --draft 
diff --git a/src/core.rs b/src/core.rs
index 8951f5e..45e3398 100644
--- a/src/core.rs
+++ b/src/core.rs
@@ -7,7 +7,7 @@ use rustyline::{Completer, Helper, Hinter, Validator};
 use std::env;
 use std::io::Write;
 use std::path::PathBuf;
-use std::process::{exit, Stdio};
+use std::process::Stdio;
 use std::{fs, io};
 
 use crate::outproxy::OutProxy;
@@ -165,7 +165,7 @@ fn exec_cmd<'a>(shell_name: &'a str, mut args: Vec<&'a str>) -> Result<()> {
 fn exec_cmd(shell_name: &str, args: Vec<&str>) -> Result<()> {
     // windows doesn't have an exec, let's do this instead
     run_subcommand(shell_name, &args, false)?;
-    exit(0);
+    std::process::exit(0);
 }
 
 fn run_subcommand(prog: &str, args: &[&str], ignore_result: bool) -> Result<()> {
diff --git a/src/parser.rs b/src/parser.rs
index 9243dfc..4d90194 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -1,4 +1,5 @@
-use std::collections::{HashMap, VecDeque};
+use hashbrown::HashMap;
+use std::collections::VecDeque;
 
 use pest::{
     iterators::{Pair, Pairs},
@@ -430,25 +431,25 @@ mod tests {
                     display_name: None,
                     entries: {
                         [
-                            'h',
+                            'c',
                         ]: Command(
                             Command {
-                                exec_str: "echo hi",
+                                exec_str: "echo ciao",
                                 settings: [],
-                                name: Some(
-                                    "print hi",
-                                ),
+                                name: None,
                                 shell: None,
                                 env_vars: [],
                             },
                         ),
                         [
-                            'c',
+                            'h',
                         ]: Command(
                             Command {
-                                exec_str: "echo ciao",
+                                exec_str: "echo hi",
                                 settings: [],
-                                name: None,
+                                name: Some(
+                                    "print hi",
+                                ),
                                 shell: None,
                                 env_vars: [],
                             },