Run

Cargo.lock

@@ -67,10 +67,21 @@ name = "lotto"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "memory-stats",
  "rand",
  "rayon",
 ]
 
+[[package]]
+name = "memory-stats"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34f79cf9964c5c9545493acda1263f1912f8d2c56c8a2ffee2606cb960acaacc"
+dependencies = [
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "ppv-lite86"
 version = "0.2.17"
@@ -132,3 +143,25 @@ name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"

Cargo.toml

@@ -7,5 +7,6 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.82"
+memory-stats = "1.1.0"
 rand = "0.8.5"
 rayon = "1.10.0"

readme.md

@@ -1,5 +1,5 @@
 # lotto
 
 ```bash
-cargo run --release
+RUSTFLAGS='-C opt-level=3 -C target-cpu=native' cargo run --release
 ```

src/main.rs

@@ -1,9 +1,7 @@
 use anyhow::anyhow;
+use std::fs::File;
 use std::io::BufRead;
-use std::{
-    io::{stdin, BufReader},
-    time::Instant,
-};
+use std::{io::BufReader, time::Instant};
 
 type Ticket = [u8; 5];
 const NUM_ENTRIES: usize = 10_000_000;
@@ -57,9 +55,11 @@ fn num_matches(t1: Ticket, t2: Ticket) -> usize {
 }
 
 fn main() -> Result<(), anyhow::Error> {
+    let start = Instant::now();
     println!("Parsing entries from stdin...");
 
-    let reader = BufReader::new(stdin());
+    let f = File::open("/mytmpfs/10m-v2.txt")?;
+    let reader = BufReader::new(f);
     let mut entries = Vec::with_capacity(NUM_ENTRIES);
 
     for line in reader.lines() {
@@ -71,7 +71,12 @@ fn main() -> Result<(), anyhow::Error> {
             Err(_) => break,
         }
     }
-    println!("{} entries parsed from stdin", entries.len());
+    let duration = start.elapsed();
+    println!(
+        "{} entries parsed from stdin in {}ms",
+        entries.len(),
+        duration.as_millis()
+    );
 
     let winning = [68, 81, 40, 34, 85];
 
@@ -89,8 +94,8 @@ fn main() -> Result<(), anyhow::Error> {
 
     println!(
         "Winners: {:?}\nTime Elapsed: {}ms",
-        winners,
-        duration.subsec_millis()
+        winners.into_iter().skip(2).collect::<Vec<usize>>(),
+        duration.subsec_millis(),
     );
 
     Ok(())