diff --git a/.vscode/tasks.json b/.vscode/tasks.json
index 616c1f4..e092400 100644
--- a/.vscode/tasks.json
+++ b/.vscode/tasks.json
@@ -108,6 +108,23 @@
         "close": false
       }
     },
+    {
+      "label": "cargo bench",
+      "type": "cargo",
+      "command": "bench",
+      "group": {
+        "kind": "test",
+        "isDefault": false
+      },
+      "problemMatcher": [
+        "$rustc"
+      ],
+      "presentation": {
+        "echo": true,
+        "reveal": "always",
+        "close": false
+      }
+    },
     {
       "label": "cargo fmt",
       "type": "cargo",
@@ -118,7 +135,7 @@
       },
       "presentation": {
         "echo": true,
-        "reveal": "always",
+        "reveal": "never",
         "close": false
       }
     }
diff --git a/Cargo.lock b/Cargo.lock
index 8b53b96..585ea04 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11,6 +11,12 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "anes"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b46cbb362ab8752921c97e041f5e366ee6297bd428a31275b9fcf1e380f7299"
+
 [[package]]
 name = "anstream"
 version = "0.6.15"
@@ -144,12 +150,51 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bumpalo"
+version = "3.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79296716171880943b8470b5f8d03aa55eb2e645a4874bdbb28adb49162e012c"
+
+[[package]]
+name = "cast"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37b2a672a2cb129a2e41c10b1224bb368f9f37a2b16b612598138befd7b37eb5"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "ciborium"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42e69ffd6f0917f5c029256a24d0161db17cea3997d185db0d35926308770f0e"
+dependencies = [
+ "ciborium-io",
+ "ciborium-ll",
+ "serde",
+]
+
+[[package]]
+name = "ciborium-io"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05afea1e0a06c9be33d539b876f1ce3692f4afea2cb41f740e7743225ed1c757"
+
+[[package]]
+name = "ciborium-ll"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57663b653d948a338bfb3eeba9bb2fd5fcfaecb9e199e87e1eda4d9e8b240fd9"
+dependencies = [
+ "ciborium-io",
+ "half",
+]
+
 [[package]]
 name = "clap"
 version = "4.5.17"
@@ -196,6 +241,42 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
 
+[[package]]
+name = "criterion"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2b12d017a929603d80db1831cd3a24082f8137ce19c69e6447f54f5fc8d692f"
+dependencies = [
+ "anes",
+ "cast",
+ "ciborium",
+ "clap",
+ "criterion-plot",
+ "is-terminal",
+ "itertools 0.10.5",
+ "num-traits",
+ "once_cell",
+ "oorandom",
+ "plotters",
+ "rayon",
+ "regex",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "tinytemplate",
+ "walkdir",
+]
+
+[[package]]
+name = "criterion-plot"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b50826342786a51a89e2da3a28f1c32b06e387201bc2d19791f622c673706b1"
+dependencies = [
+ "cast",
+ "itertools 0.10.5",
+]
+
 [[package]]
 name = "crossbeam-deque"
 version = "0.8.5"
@@ -221,6 +302,12 @@ version = "0.8.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "22ec99545bb0ed0ea7bb9b8e1e9122ea386ff8a48c0922e43f36d45ab09e0e80"
 
+[[package]]
+name = "crunchy"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
+
 [[package]]
 name = "difflib"
 version = "0.4.0"
@@ -310,6 +397,16 @@ dependencies = [
  "walkdir",
 ]
 
+[[package]]
+name = "half"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6dd08c532ae367adf81c312a4580bc67f1d0fe8bc9c460520283f4c0ff277888"
+dependencies = [
+ "cfg-if",
+ "crunchy",
+]
+
 [[package]]
 name = "hashbrown"
 version = "0.14.5"
@@ -322,6 +419,12 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
+[[package]]
+name = "hermit-abi"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fbf6a919d6cf397374f7dfeeea91d974c7c0a7221d0d0f4f20d859d329e53fcc"
+
 [[package]]
 name = "ignore"
 version = "0.4.23"
@@ -348,12 +451,32 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "is-terminal"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "261f68e344040fbd0edea105bef17c66edf46f984ddb1115b775ce31be948f4b"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "is_terminal_polyfill"
 version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
+[[package]]
+name = "itertools"
+version = "0.10.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0fd2260e829bddf4cb6ea802289de2f86d6a7a690192fbe91b3f46e0f2c8473"
+dependencies = [
+ "either",
+]
+
 [[package]]
 name = "itertools"
 version = "0.11.0"
@@ -369,6 +492,15 @@ version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
+[[package]]
+name = "js-sys"
+version = "0.3.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a88f1bda2bd75b0452a14784937d796722fdebfe50df998aeb3f0b7603019a9"
+dependencies = [
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -445,6 +577,12 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
+[[package]]
+name = "oorandom"
+version = "11.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b410bbe7e14ab526a0e86877eb47c6996a2bd7746f027ba551028c925390e4e9"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.3"
@@ -468,6 +606,34 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "plotters"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aeb6f403d7a4911efb1e33402027fc44f29b5bf6def3effcc22d7bb75f2b747"
+dependencies = [
+ "num-traits",
+ "plotters-backend",
+ "plotters-svg",
+ "wasm-bindgen",
+ "web-sys",
+]
+
+[[package]]
+name = "plotters-backend"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "df42e13c12958a16b3f7f4386b9ab1f3e7933914ecea48da7139435263a4172a"
+
+[[package]]
+name = "plotters-svg"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51bae2ac328883f7acdfea3d66a7c35751187f870bc81f94563733a154d7a670"
+dependencies = [
+ "plotters-backend",
+]
+
 [[package]]
 name = "predicates"
 version = "3.1.2"
@@ -516,6 +682,26 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "rayon"
+version = "1.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b418a60154510ca1a002a752ca9714984e21e4241e804d32555251faf8b78ffa"
+dependencies = [
+ "either",
+ "rayon-core",
+]
+
+[[package]]
+name = "rayon-core"
+version = "1.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1465873a3dfdaa8ae7cb14b4383657caab0b3e8a0aa9ae8e04b044854c8dfce2"
+dependencies = [
+ "crossbeam-deque",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "redox_syscall"
 version = "0.5.3"
@@ -594,7 +780,7 @@ dependencies = [
  "arc-swap",
  "base62",
  "globwalk",
- "itertools",
+ "itertools 0.11.0",
  "lazy_static",
  "normpath",
  "once_cell",
@@ -756,6 +942,7 @@ version = "0.1.2"
 dependencies = [
  "assert_cmd",
  "clap",
+ "criterion",
  "predicates",
  "rust-i18n",
  "sys-locale",
@@ -797,6 +984,16 @@ dependencies = [
  "rustc-hash",
 ]
 
+[[package]]
+name = "tinytemplate"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4d6b5f19ff7664e8c98d03e2139cb510db9b0a60b55f8e8709b689d939b6bc"
+dependencies = [
+ "serde",
+ "serde_json",
+]
+
 [[package]]
 name = "toml"
 version = "0.7.8"
@@ -873,6 +1070,71 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "wasm-bindgen"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "128d1e363af62632b8eb57219c8fd7877144af57558fb2ef0368d0087bddeb2e"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "wasm-bindgen-macro",
+]
+
+[[package]]
+name = "wasm-bindgen-backend"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cb6dd4d3ca0ddffd1dd1c9c04f94b868c37ff5fac97c30b97cff2d74fce3a358"
+dependencies = [
+ "bumpalo",
+ "log",
+ "once_cell",
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-macro"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e79384be7f8f5a9dd5d7167216f022090cf1f9ec128e6e6a482a2cb5c5422c56"
+dependencies = [
+ "quote",
+ "wasm-bindgen-macro-support",
+]
+
+[[package]]
+name = "wasm-bindgen-macro-support"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "26c6ab57572f7a24a4985830b120de1594465e5d500f24afe89e16b4e833ef68"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "wasm-bindgen-backend",
+ "wasm-bindgen-shared",
+]
+
+[[package]]
+name = "wasm-bindgen-shared"
+version = "0.2.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65fc09f10666a9f147042251e0dda9c18f166ff7de300607007e96bdebc1068d"
+
+[[package]]
+name = "web-sys"
+version = "0.3.72"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f6488b90108c040df0fe62fa815cbdee25124641df01814dd7282749234c6112"
+dependencies = [
+ "js-sys",
+ "wasm-bindgen",
+]
+
 [[package]]
 name = "winapi-util"
 version = "0.1.9"
diff --git a/Cargo.toml b/Cargo.toml
index 2e7b06a..ca3a376 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,6 +7,8 @@ authors = ["guza <guza@duck.com>"]
 repository = "https://github.com/guuzaa/tc"
 license = "MIT"
 readme = "README.md"
+exclude = [".github/*", ".vscode/*"]
+categories = ["command-line-utilities", "cli-apps", "text-processing"]
 
 [dependencies]
 clap = { version = "4.3", features = ["derive"] }
@@ -17,4 +19,9 @@ tiktoken-rs = "0.5.9"
 [dev-dependencies]
 assert_cmd = "2.0"
 predicates = "3.0.0"
-tempfile = "3.12.0"
\ No newline at end of file
+tempfile = "3.12.0"
+criterion = "0.5"
+
+[[bench]]
+name = "tc_benches"
+harness = false
diff --git a/benches/tc_benches.rs b/benches/tc_benches.rs
new file mode 100644
index 0000000..36049e4
--- /dev/null
+++ b/benches/tc_benches.rs
@@ -0,0 +1,73 @@
+use assert_cmd::Command;
+use criterion::{criterion_group, criterion_main, Criterion};
+use std::io::Write;
+use tempfile::NamedTempFile;
+
+fn bench_tc_command(c: &mut Criterion) {
+    let mut group = c.benchmark_group("tc_command");
+
+    // Benchmark with small input
+    let small_input = "This is a small input\nfor benchmarking purposes.";
+    bench_with_input(&mut group, "small_input", small_input);
+
+    // Benchmark with medium input
+    let medium_input = "This is a medium input\n".repeat(100);
+    bench_with_input(&mut group, "medium_input", &medium_input);
+
+    // Benchmark with large input
+    let large_input = "This is a large input\n".repeat(1000);
+    bench_with_input(&mut group, "large_input", &large_input);
+
+    group.finish();
+}
+
+fn bench_with_input(
+    group: &mut criterion::BenchmarkGroup<criterion::measurement::WallTime>,
+    name: &str,
+    input: &str,
+) {
+    let mut temp_file = NamedTempFile::new().unwrap();
+    write!(temp_file, "{}", input).unwrap();
+
+    group.bench_function(name, |b| {
+        b.iter(|| {
+            Command::cargo_bin("tc")
+                .unwrap()
+                .arg(temp_file.path())
+                .assert()
+                .success();
+        });
+    });
+}
+
+fn bench_multiple_files(c: &mut Criterion) {
+    let mut group = c.benchmark_group("tc_multiple_files");
+    let file_contents = "This is a test file\nwith multiple lines\nfor benchmarking purposes.\n안녕하세요, 이것은 한국어 문장입니다.\nこんにちは、これは日本語の文章です。\n";
+
+    for &num_files in &[1, 10, 50, 500] {
+        let temp_files: Vec<NamedTempFile> = (0..num_files)
+            .map(|_| {
+                let mut file = NamedTempFile::new().unwrap();
+                write!(file, "{}", file_contents).unwrap();
+                file
+            })
+            .collect();
+
+        let file_paths: Vec<_> = temp_files
+            .iter()
+            .map(|f| f.path().to_str().unwrap())
+            .collect();
+
+        group.bench_function(format!("{}_files", num_files), |b| {
+            b.iter(|| {
+                let mut cmd = Command::cargo_bin("tc").unwrap();
+                cmd.arg("-l").args(&file_paths).assert().success();
+            });
+        });
+    }
+
+    group.finish();
+}
+
+criterion_group!(benches, bench_tc_command, bench_multiple_files);
+criterion_main!(benches);