diff --git a/Cargo.lock b/Cargo.lock
index 8906511..88b9991 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,33 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "chrono"
+version = "0.4.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d87d9d13be47a5b7c3907137f1290b0459a7f80efb26be8c52afb11963bccb02"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f30b0abd723be7e2ffca1272140fac1a2f084c77ec3e123c192b66af1ee9e6c2"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "wasted"
 version = "0.1.0"
+dependencies = [
+ "chrono",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 605d1d6..400ceaa 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+chrono = { version = "0.4.29", default-features = false }
diff --git a/src/main.rs b/src/main.rs
index 6317c24..d73bd25 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,16 @@
-use std::{env, process::Command, time::SystemTime};
+use std::{
+	env,
+	fs::{self, File},
+	io::Write,
+	process::{exit, Command},
+	time::{SystemTime, UNIX_EPOCH},
+};
+
+use chrono::NaiveDateTime;
 
 fn main() {
 	let start_time = SystemTime::now();
+
 	let args: Vec<String> = env::args().collect();
 
 	println!("{:?}", args);
@@ -14,11 +23,43 @@ fn main() {
 	println!("starting build");
 	let exit_status = Command::new(cmd).args(&args[2..]).status();
 	println!("\n");
-	let time_taken = start_time.elapsed().unwrap();
+	let time_taken = start_time.elapsed();
 	println!("Took {:?}", time_taken);
 
+	log(&start_time);
+
 	println!("{:?}", exit_status);
 	if let Some(status) = exit_status.ok().and_then(|s| s.code()) {
-		std::process::exit(status);
+		exit(status);
 	}
 }
+
+fn log(start: &SystemTime) -> Option<()> {
+	let start_time = start.duration_since(UNIX_EPOCH).ok()?.as_millis();
+	let duration = start.elapsed().ok()?.as_millis();
+	let mut history = fs::read_to_string("compiler_history.txt").unwrap_or_default();
+	history.push_str(&format!("{}:{}\n", start_time, duration));
+
+	let today = NaiveDateTime::from_timestamp_millis(start_time as i64)?;
+	let mut wasted = 0;
+	for line in history.lines() {
+		let (time, duration) = line.split_once(':')?;
+		let time: i64 = time.parse().ok()?;
+		let duration: i64 = duration.parse().ok()?;
+		let date = NaiveDateTime::from_timestamp_millis(time)?;
+		if date.date() == today.date() {
+			wasted += duration;
+		}
+	}
+	{
+		let sec = wasted / 1000 % 60;
+		let min = wasted / (60 * 1000) % 60;
+		let h = wasted / (60 * 60 * 1000);
+		println!("Total wasted today: {}h {}m {}s", h, min, sec);
+	}
+	{
+		let mut f = File::create("compiler_history.txt").unwrap();
+		f.write_all(history.as_bytes()).unwrap();
+	}
+	Some(())
+}