Add more benchmarks.

README.md

@@ -146,6 +146,8 @@ There are also a number of examples scripts that showcase Rhai's features, all i
 | -------------------------------------------- | ---------------------------------------------------------------------------------- |
 | [`speed_test.rhai`](scripts/speed_test.rhai) | a simple program to measure the speed of Rhai's interpreter (1 million iterations) |
 | [`primes.rhai`](scripts/primes.rhai)         | use Sieve of Eratosthenes to find all primes smaller than a limit                  |
+| [`fibonacci.rhai`](scripts/fibonacci.rhai)   | calculate the n-th Fibonacci number using a really dumb algorithm                  |
+| [`mat_mul.rhai`](scripts/mat_mul.rhai)       | matrix multiplication test to measure the speed of Rhai's interpreter              |
 
 To run the scripts, either make a tiny program or use of the `rhai_runner` example:
 

benches/iterations.rs

@@ -3,7 +3,7 @@
 ///! Test 1,000 iterations
 extern crate test;
 
-use rhai::{Engine, OptimizationLevel};
+use rhai::{Engine, OptimizationLevel, Scope, INT};
 use test::Bencher;
 
 #[bench]
@@ -23,3 +23,27 @@ fn bench_iterations_1000(bench: &mut Bencher) {
 
     bench.iter(|| engine.consume_ast(&ast).unwrap());
 }
+
+#[bench]
+fn bench_iterations_fibonacci(bench: &mut Bencher) {
+    let script = r#"
+        fn fibonacci(n) {
+            if n < 2 {
+                n
+            } else {
+                fibonacci(n-1) + fibonacci(n-2)
+            }
+        }
+    "#;
+
+    let mut engine = Engine::new();
+    engine.set_optimization_level(OptimizationLevel::None);
+
+    let ast = engine.compile(script).unwrap();
+
+    bench.iter(|| {
+        engine
+            .call_fn::<_, INT>(&mut Scope::new(), &ast, "fibonacci", (20 as INT,))
+            .unwrap()
+    });
+}

scripts/fibonacci.rhai

@@ -0,0 +1,22 @@
+// This script calculates the n-th Fibonacci number using a really dumb algorithm
+// to test the speed of the scripting engine.
+
+const target = 30;
+
+let now = timestamp();
+
+fn fib(n) {
+    if n < 2 {
+         n
+    } else {
+        fib(n-1) + fib(n-2)
+    }
+}
+
+print("Ready... Go!");
+
+let result = fib(target);
+
+print("Fibonacci number #" + target + " = " + result);
+
+print("Finished. Run time = " + now.elapsed() + " seconds.");

scripts/mat_mul.rhai

@@ -0,0 +1,73 @@
+const SIZE = 50;
+
+fn new_mat(x, y) {
+	let row = [];
+	row.pad(y, 0.0);
+	
+	let matrix = [];
+	matrix.pad(x, row);
+	
+	matrix
+}
+
+fn mat_gen(n) {
+    let m = new_mat(n, n);
+    let tmp = 1.0 / n.to_float() / n.to_float();
+
+    for i in range(0, n) {
+        for j in range(0, n) {
+			let foo = m[i];
+            foo[j] = tmp * (i.to_float() - j.to_float()) * (i.to_float() + j.to_float());
+			m[i] = foo;
+        }
+    }
+	
+    m
+}
+
+fn mat_mul(a, b) {
+    let m = a.len();
+    let n = a[0].len();
+    let p = b[0].len();
+
+    let b2 = new_mat(n, p);
+	
+    for i in range(0, n) {
+        for j in range(0, p) {
+			let foo = b2[j];
+            foo[i] = b[i][j];
+			b2[j] = foo;
+        }
+    }
+
+    let c = new_mat(m, p);
+
+	for i in range(0, c.len()) {
+		let ci = c[i];
+		for j in range(0, ci.len()) {
+			let b2j = b2[j];
+			ci[j] = 0.0;
+			
+			for z in range(0, a[i].len()) {
+				let x = a[i][z];
+				let y = b2j[z];
+				ci[j] += x * y;
+			}
+        }
+		c[i] = ci;
+    }
+
+    c
+}
+
+let now = timestamp();
+
+let a = mat_gen(SIZE);
+let b = mat_gen(SIZE);
+let c = mat_mul(a, b);
+
+for i in range(0, SIZE) {
+	print(c[i]);
+}
+
+print("Finished. Run time = " + now.elapsed() + " seconds.");