rust?

.gitignore

@@ -3,3 +3,4 @@
 *.iml
 *.class
 out
+target

primes/README.md

@@ -5,4 +5,5 @@ Printing time is not included.
 
 | Language | Time   |
 | ---------| -------|
-| Java     | 1836ms |
+| Java     | 1836ms |
+| Javascript | 1778.2ms |

primes/javascript/primes.js

@@ -0,0 +1,41 @@
+
+const times = [];
+
+for (let i = 0; i < 10; i++) {
+    console.log(`staring ${i} run`)
+    const startTime = Date.now();
+    primes(10_000_000)
+    const totalTime = Date.now() - startTime;
+    times.push(totalTime);
+}
+
+const average = times.reduce((a, b) => a + b, 0) / times.length;
+console.log(`Average time was ${average}ms`)
+
+
+
+function primes(max) {
+    const primesList = [];
+
+    primesList.push(2);
+
+    for (let i = 3; i < max; i++) { //go through all numbers
+        let isPrime = true;
+        for (let j = 0; j < primesList.length; j++) { //test each number
+            let prime = primesList[j];
+            if (prime > Math.sqrt(i)) {
+                break;
+            }
+            if (i % prime === 0) { //i = test number, j = some known prime
+                isPrime = false;
+                break;
+            }
+        }
+
+        if (isPrime) {
+            primesList.push(i);
+        }
+    }
+
+    return primesList;
+}

primes/rust/Cargo.lock

@@ -0,0 +1,5 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
+name = "rust-primes"
+version = "0.1.0"

primes/rust/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "rust-primes"
+version = "0.1.0"
+authors = ["Nilstrieb <nilstrieb@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

primes/rust/src/main.rs

@@ -0,0 +1,43 @@
+use std::time::{SystemTime};
+
+fn main() {
+    let mut times = Vec::new();
+
+    for i in 0..10 {
+        println!("Starting run {}", i);
+        let start = SystemTime::now();
+        let _ = primes(10_000_000);
+        let time = start.elapsed().unwrap().as_millis();
+        times.push(time);
+    }
+
+    let average = times.iter().sum::<u128>() / times.len() as u128;
+    println!("Took {}ms on average", average);
+}
+
+
+fn primes(max: usize) -> Vec<usize> {
+    let mut primes_list = Vec::new();
+
+    primes_list.push(2);
+
+
+    for i in 3..max { //go through all numbers
+        let mut is_prime = true;
+        for prime in &primes_list { //test each number
+            if *prime > (i as f64).sqrt() as usize {
+                break;
+            }
+            if i % prime == 0 { //i = test number, j = some known prime
+                is_prime = false;
+                break;
+            }
+        }
+
+        if is_prime {
+            primes_list.push(i);
+        }
+    }
+
+    return primes_list;
+}