chore: add blob corruption benches

Author: not-matthias

Cargo.lock

@@ -11,6 +11,8 @@ path = "src/lib.rs"
 rand = "0.8"
 image = "0.25"
 image-compare = "0.5.0"
+rayon = "1.10"
+memmap2 = "0.9"
 
 [dev-dependencies]
 divan = { version = "4.0.2", package = "codspeed-divan-compat" }

Cargo.toml

@@ -1,12 +1,12 @@
 use divan::Bencher;
-use eurorust_2025_workshop::blob_corruption_checker::find_corruptions_sequential;
+use eurorust_2025_workshop::blob_corruption_checker::{find_corruptions_sequential, find_corruptions_parallel, find_corruptions_simd, find_corruptions_simd_parallel};
 
 fn main() {
     divan::main();
 }
 
 #[divan::bench(sample_count = 3, sample_size = 5)]
-fn corruption_check(bencher: Bencher) {
+fn corruption_check_sequential(bencher: Bencher) {
     bencher.bench_local(|| {
         let corruptions = divan::black_box(find_corruptions_sequential(
             "reference.bin",
@@ -31,3 +31,84 @@ fn corruption_check(bencher: Bencher) {
         assert_eq!(corruptions[49].length, 5120, "Last corruption length");
     });
 }
+
+#[divan::bench(sample_count = 3, sample_size = 5)]
+fn corruption_check_parallel(bencher: Bencher) {
+    bencher.bench_local(|| {
+        let corruptions = divan::black_box(find_corruptions_parallel(
+            "reference.bin",
+            "corrupted.bin",
+            1024, // 1KB chunks
+        ));
+
+        assert_eq!(corruptions.len(), 50, "Should find 50 corruptions");
+
+        // All corruptions should be 1KB aligned
+        for corruption in &corruptions {
+            assert_eq!(corruption.offset % 1024, 0, "Corruption offset should be 1KB aligned");
+            assert_eq!(corruption.length % 1024, 0, "Corruption length should be multiple of 1KB");
+        }
+
+        // Check specific corruptions
+        assert_eq!(corruptions[0].offset, 14801920, "First corruption offset");
+        assert_eq!(corruptions[0].length, 2048, "First corruption length");
+        assert_eq!(corruptions[25].offset, 243891200, "Middle corruption offset");
+        assert_eq!(corruptions[25].length, 4096, "Middle corruption length");
+        assert_eq!(corruptions[49].offset, 507871232, "Last corruption offset");
+        assert_eq!(corruptions[49].length, 5120, "Last corruption length");
+    });
+}
+
+#[divan::bench(sample_count = 3, sample_size = 5)]
+fn corruption_check_simd(bencher: Bencher) {
+    bencher.bench_local(|| {
+        let corruptions = divan::black_box(find_corruptions_simd(
+            "reference.bin",
+            "corrupted.bin",
+            1024, // 1KB chunks
+        ));
+
+        assert_eq!(corruptions.len(), 50, "Should find 50 corruptions");
+
+        // All corruptions should be 1KB aligned
+        for corruption in &corruptions {
+            assert_eq!(corruption.offset % 1024, 0, "Corruption offset should be 1KB aligned");
+            assert_eq!(corruption.length % 1024, 0, "Corruption length should be multiple of 1KB");
+        }
+
+        // Check specific corruptions
+        assert_eq!(corruptions[0].offset, 14801920, "First corruption offset");
+        assert_eq!(corruptions[0].length, 2048, "First corruption length");
+        assert_eq!(corruptions[25].offset, 243891200, "Middle corruption offset");
+        assert_eq!(corruptions[25].length, 4096, "Middle corruption length");
+        assert_eq!(corruptions[49].offset, 507871232, "Last corruption offset");
+        assert_eq!(corruptions[49].length, 5120, "Last corruption length");
+    });
+}
+
+#[divan::bench(sample_count = 3, sample_size = 5)]
+fn corruption_check_simd_parallel(bencher: Bencher) {
+    bencher.bench_local(|| {
+        let corruptions = divan::black_box(find_corruptions_simd_parallel(
+            "reference.bin",
+            "corrupted.bin",
+            1024, // 1KB chunks
+        ));
+
+        assert_eq!(corruptions.len(), 50, "Should find 50 corruptions");
+
+        // All corruptions should be 1KB aligned
+        for corruption in &corruptions {
+            assert_eq!(corruption.offset % 1024, 0, "Corruption offset should be 1KB aligned");
+            assert_eq!(corruption.length % 1024, 0, "Corruption length should be multiple of 1KB");
+        }
+
+        // Check specific corruptions
+        assert_eq!(corruptions[0].offset, 14801920, "First corruption offset");
+        assert_eq!(corruptions[0].length, 2048, "First corruption length");
+        assert_eq!(corruptions[25].offset, 243891200, "Middle corruption offset");
+        assert_eq!(corruptions[25].length, 4096, "Middle corruption length");
+        assert_eq!(corruptions[49].offset, 507871232, "Last corruption offset");
+        assert_eq!(corruptions[49].length, 5120, "Last corruption length");
+    });
+}