added performance stats

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "irradiate"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["ultraviolet"]
 edition = "2018"
 

README.md

@@ -1,4 +1,4 @@
-# Irradiate v0.1
+# Irradiate v0.2
 #### Evelene Ultraviolet
 #### July 2019
 #### AGPL v3
@@ -62,3 +62,9 @@ resemblance they bear to the originals considered as a happy accident.
 
 All this being said: if you ever *do* run Irradiate on some important system of device file and something funny
 or cool happens... let us know, yeah?
+
+---
+
+### Changelog
+**2019 July 1**: Initial commit in working form  
+**2019 July 7**: Added timing stats

src/main.rs

@@ -1,11 +1,15 @@
-// Irradiate, a program to introduce randomly distributed noise into files
+// Irradiate v0.2
 // Evelene Ultraviolet
+// Ellie Photodiode
+// Ariane Mechanism
+// Amelia Rainfall
 // July 2019
 
 use std::io::prelude::*;
 use std::io::stdout;
 use std::io::SeekFrom;
 use std::fs::OpenOptions;
+use std::time::{Duration,Instant};
 use std::process::exit;
 
 extern crate rand;
@@ -30,8 +34,9 @@ fn flip_bit(byte:&mut u8, index:usize) {
 
 fn main() {
 	let args = lapp::parse_args("
+		Irradiate file corruptor v0.2
 		<filename> (string) name of file on which to operate
-		-n, --count (default 100) integer number of bits to affect in the file
+		-n, --count (default 10) integer number of bits to affect in the file
 		-0, --zero never set affected bits to 1, only set them to 0.
 		-1, --one never set affected bits to 0, only set them to 1.
 		-f, --flip invert affected bits, ensuring that the file contains an exact number of errors
@@ -95,10 +100,19 @@ fn main() {
 		},
 	};
 
+	let mut total_seektime:Duration = Duration::new(0,0);
+	let mut total_readtime:Duration = Duration::new(0,0);
+	let mut total_writtime:Duration = Duration::new(0,0);
+
+	let mut seekstart:Instant;
+	let mut readstart:Instant;
+	let mut writstart:Instant;
+
 	print!("\rirradiating [  0%]");
 	for rep in 0..reps {
 		// go to a randomly-selected location, between the holdoff position and the file end.
 		let position = rng.gen_range(holdoff, infile_len);
+		seekstart = Instant::now();
 		match infile.seek(SeekFrom::Start(position)) {
 			Ok(_) => (),
 			Err(why) => {
@@ -106,7 +120,9 @@ fn main() {
 				exit(1);
 			},
 		};
+		total_seektime += seekstart.elapsed();
 		// read data into the buffer 
+		readstart = Instant::now();
 		match infile.read(&mut buffer) {
 			Ok(n) => match n {
 				0 => break,
@@ -117,7 +133,9 @@ fn main() {
 				exit(1);
 			},
 		};
+		total_readtime += readstart.elapsed();
 		// go back to the same position from which we read the data
+		seekstart = Instant::now();
 		match infile.seek(SeekFrom::Start(position)) {
 			Ok(_) => (),
 			Err(why) => {
@@ -125,6 +143,7 @@ fn main() {
 				exit(1);
 			},
 		};
+		total_seektime += seekstart.elapsed();
 		// set a random bit of this byte
 		let bit = rng.gen_range(0,8);
 		if one_only {
@@ -137,6 +156,7 @@ fn main() {
 			set_bit(&mut buffer[0], bit, rng.gen::<bool>());
 		}
 		// write the modified data back to the file
+		writstart = Instant::now();
 		match infile.write_all(&buffer) {
 			Ok(_) => (),
 			Err(why) => {
@@ -144,6 +164,8 @@ fn main() {
 				exit(1);
 			},
 		};
+		let _ = infile.flush();
+		total_writtime += writstart.elapsed();
 		// update the progress meter
 		while milestones[current_milestone] <= rep && current_milestone < 98 {
 			print!("\rirradiating [{:3}%]", current_milestone);
@@ -154,4 +176,8 @@ fn main() {
 	}
 	print!("\rirradiating [100%]");
 	println!();
+	println!("irradiating done.");
+	println!("time seeking: {} s", (total_seektime.as_micros() as f32)/1000000.0);
+	println!("time reading: {} s", (total_readtime.as_micros() as f32)/1000000.0);
+	println!("time writing: {} s", (total_writtime.as_micros() as f32)/1000000.0);
 }