From a9610a576265f27cb6df4e6fabe6b9fa3651383f Mon Sep 17 00:00:00 2001
From: gered <gered@blarg.ca>
Date: Sun, 1 Jan 2023 12:43:15 -0500
Subject: [PATCH] add initial benchmark tests for asset loading

only for gif bitmaps right now, since i want to (eventually) clean that
up somewhat
---
 libretrogd/Cargo.toml         |  4 ++++
 libretrogd/benches/loading.rs | 27 +++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 libretrogd/benches/loading.rs

diff --git a/libretrogd/Cargo.toml b/libretrogd/Cargo.toml
index 8ecc1ed..f6930fb 100644
--- a/libretrogd/Cargo.toml
+++ b/libretrogd/Cargo.toml
@@ -30,3 +30,7 @@ harness = false
 [[bench]]
 name = "blit"
 harness = false
+
+[[bench]]
+name = "loading"
+harness = false
diff --git a/libretrogd/benches/loading.rs b/libretrogd/benches/loading.rs
new file mode 100644
index 0000000..61812f7
--- /dev/null
+++ b/libretrogd/benches/loading.rs
@@ -0,0 +1,27 @@
+use std::io::Cursor;
+
+use criterion::{black_box, Criterion, criterion_group, criterion_main};
+
+use libretrogd::graphics::*;
+
+pub static SMALL_GIF_FILE_BYTES: &[u8] = include_bytes!("../test-assets/test.gif");
+pub static LARGE_GIF_FILE_BYTES: &[u8] = include_bytes!("../test-assets/test_image.gif");
+
+pub fn criterion_benchmark(c: &mut Criterion) {
+    c.bench_function("loading_small_gif", |b| {
+        b.iter(|| {
+            let mut reader = Cursor::new(SMALL_GIF_FILE_BYTES);
+            Bitmap::load_gif_bytes(black_box(&mut reader)).unwrap();
+        })
+    });
+
+    c.bench_function("loading_large_gif", |b| {
+        b.iter(|| {
+            let mut reader = Cursor::new(LARGE_GIF_FILE_BYTES);
+            Bitmap::load_gif_bytes(black_box(&mut reader)).unwrap();
+        })
+    });
+}
+
+criterion_group!(benches, criterion_benchmark);
+criterion_main!(benches);