From 366c78766d75e535dde6b6d223b549d0469c72cc Mon Sep 17 00:00:00 2001
From: CrispyPin <crispin@tasa.se>
Date: Fri, 21 Jul 2023 17:34:05 +0200
Subject: [PATCH] add criterion benchmark

---
 Cargo.lock            | 470 ++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml            |   9 +
 benches/large_grid.rs |  17 ++
 src/lib.rs            |   2 +
 src/main.rs           |   4 +-
 5 files changed, 499 insertions(+), 3 deletions(-)
 create mode 100644 benches/large_grid.rs
 create mode 100644 src/lib.rs

diff --git a/Cargo.lock b/Cargo.lock
index b4aa59e..d32ce4a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,12 +2,170 @@
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+dependencies = [
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 [[package]]
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@@ -23,21 +181,111 @@ dependencies = [
 name = "gol-bitwise"
 version = "0.1.0"
 dependencies = [
+ "criterion",
  "rand",
 ]
 
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 checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
 
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+
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 [[package]]
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@@ -68,8 +316,230 @@ dependencies = [
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 ]
 
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+ "windows_x86_64_gnullvm",
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diff --git a/Cargo.toml b/Cargo.toml
index 145f3e7..f4ed9ac 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,3 +7,12 @@ edition = "2021"
 
 [dependencies]
 rand = "0.8.5"
+
+[[bench]]
+name = "large_grid"
+harness = false
+
+[dev-dependencies]
+criterion = { version = "0.5.1", default-features = false, features = [
+	"cargo_bench_support",
+] }
diff --git a/benches/large_grid.rs b/benches/large_grid.rs
new file mode 100644
index 0000000..60a771d
--- /dev/null
+++ b/benches/large_grid.rs
@@ -0,0 +1,17 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use gol_bitwise::region::Region;
+
+fn large_grid(c: &mut Criterion) {
+	const SIZE: usize = 2048 / gol_bitwise::tile::WIDTH; // same number of cells regardless of tile size
+	let mut region = black_box(Region::new(SIZE, SIZE));
+	region.randomise();
+
+	c.bench_function("large grid", |b| {
+		b.iter(|| {
+			region.step();
+		})
+	});
+}
+
+criterion_group!(benches, large_grid);
+criterion_main!(benches);
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..dae266f
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,2 @@
+pub mod region;
+pub mod tile;
diff --git a/src/main.rs b/src/main.rs
index a75db9b..664dad8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,4 @@
-mod region;
-mod tile;
-use region::Region;
+use gol_bitwise::region::Region;
 
 fn main() {
 	let mut region = Region::new(1, 1);