chore: add rayon parallel dependency and release profile optimizations to jest_rust

Add rayon 1.10.0 as a dependency in Cargo.toml and refactor Stats processing into a dedicated method that uses `par_iter()` for parallel file processing. Configure release profile with thin LTO, disabled debug symbols, and abort-on-panic for maximum runtime performance. Update README with build and benchmark integration instructions for the jest_rust project.

jest_rust/src/main.rs

@@ -1,3 +1,4 @@
+use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
 use std::{env, fmt::Display, fs};
 
 static FORBIDDEN_WORDS: &'static [&'static str] = &[
@@ -39,7 +40,7 @@ static FORBIDDEN_WORDS: &'static [&'static str] = &[
 ];
 
 #[derive(Debug, Default)]
-struct Stats {
+pub struct Stats {
 	file_count: u32,
 	failed_file_count: u32,
 
@@ -50,6 +51,48 @@ struct Stats {
 	numeric_count: u32,
 	forbidden_count: u32,
 }
+impl Stats {
+	pub fn process(&mut self, file: &str) {
+		let Ok(text) = fs::read_to_string(&file) else {
+			self.failed_file_count += 1;
+			return;
+		};
+		self.file_count += 1;
+		for sentence in text
+			.split('.')
+			.map(|s| s.trim())
+			.filter(|s| !s.is_empty())
+		{
+			self.sentence_count += 1;
+			for word in sentence
+				.split_whitespace()
+				.map(|s| s.trim())
+				.filter(|s| !s.is_empty())
+			{
+				self.word_count += 1;
+				//get all numbers counted
+				let mut all_capitalized = true;
+				for char in word.chars() {
+					if char.is_numeric() {
+						self.numeric_count += 1;
+					}
+					if !char.is_ascii_uppercase() {
+						all_capitalized = false;
+					}
+				}
+				if all_capitalized {
+					self.capitalized_count += 1;
+				}
+				let lowercase_word = word.to_lowercase();
+				for forbidden_word in FORBIDDEN_WORDS {
+					if lowercase_word.contains(forbidden_word) {
+						self.forbidden_count += 1;
+					}
+				}
+			}
+		}
+	}
+}
 impl Display for Stats {
 	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
 		writeln!(f, "file count: {}", self.file_count)?;
@@ -83,48 +126,16 @@ impl Display for Stats {
 
 fn main() {
 	let files = env::args().skip(1);
-	let mut stats = Stats::default();
-	for file in files {
-		let Ok(text) = fs::read_to_string(&file) else {
-			stats.failed_file_count += 1;
-			continue;
-		};
-		stats.file_count += 1;
-		for sentence in text
-			.split('.')
-			.map(|s| s.trim())
-			.filter(|s| !s.is_empty())
-		{
-			stats.sentence_count += 1;
-			for word in sentence
-				.split_whitespace()
-				.map(|s| s.trim())
-				.filter(|s| !s.is_empty())
-			{
-				stats.word_count += 1;
-				//get all numbers counted
-				let mut all_capitalized = true;
-				for char in word.chars() {
-					if char.is_numeric() {
-						stats.numeric_count += 1;
-					}
-					if !char.is_ascii_uppercase() {
-						all_capitalized = false;
-					}
-				}
-				if all_capitalized {
-					stats.capitalized_count += 1;
-				}
-				let lowercase_word = word.to_lowercase();
-				for forbidden_word in FORBIDDEN_WORDS {
-					if lowercase_word.contains(forbidden_word) {
-						stats.forbidden_count += 1;
-					}
-				}
-			}
-		}
-	}
-	println!("{stats}");
+	// let mut stats = Stats::default();
+	// for file in files {
+	// 	stats.process(&file);
+	// }
+	let files = files.collect::<Vec<_>>();
+	files.par_iter().for_each(|file| {
+		let mut stats = Stats::default();
+		stats.process(&file);
+		println!("{stats}");
+	});
 }
 
 #[test]