Add some benchmarks for reading from extension/signature

Cargo.toml

@@ -41,4 +41,15 @@ mp3 = ["id3"]
 wav = ["riff"]
 vorbis = ["lewton", "metaflac", "opus_headers", "ogg"]
 all_tags = ["vorbis", "mp4", "mp3", "wav", "ape"]
-duration = ["mp3-duration"]
+duration = ["mp3-duration"]
+
+[dev-dependencies]
+criterion = "0.3"
+
+[[bench]]
+name = "read_from_extension"
+harness = false
+
+[[bench]]
+name = "read_from_signature"
+harness = false

benches/read_from_extension.rs

@@ -0,0 +1,33 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use lofty::{DetermineFrom, Tag};
+
+macro_rules! test_read {
+	($function:ident, $path:expr) => {
+		fn $function() {
+			let _ = Tag::new()
+				.read_from_path($path, DetermineFrom::Extension)
+				.unwrap();
+		}
+	};
+}
+
+test_read!(read_ape, "tests/assets/a.ape");
+test_read!(read_flac, "tests/assets/a.flac");
+test_read!(read_m4a, "tests/assets/a.m4a");
+test_read!(read_mp3, "tests/assets/a.mp3");
+test_read!(read_ogg, "tests/assets/a.ogg");
+test_read!(read_opus, "tests/assets/a.opus");
+test_read!(read_wav, "tests/assets/a-id3.wav");
+
+fn bench_ext(c: &mut Criterion) {
+	c.bench_function("APE - Extension", |b| b.iter(|| read_ape()));
+	c.bench_function("FLAC - Extension", |b| b.iter(|| read_flac()));
+	c.bench_function("MP4 - Extension", |b| b.iter(|| read_m4a()));
+	c.bench_function("MP3 - Extension", |b| b.iter(|| read_mp3()));
+	c.bench_function("OGG - Extension", |b| b.iter(|| read_ogg()));
+	c.bench_function("OPUS - Extension", |b| b.iter(|| read_opus()));
+	c.bench_function("WAV - Extension", |b| b.iter(|| read_wav()));
+}
+
+criterion_group!(benches, bench_ext);
+criterion_main!(benches);

benches/read_from_signature.rs

@@ -0,0 +1,33 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use lofty::{DetermineFrom, Tag};
+
+macro_rules! test_read {
+	($function:ident, $path:expr) => {
+		fn $function() {
+			let _ = Tag::new()
+				.read_from_path($path, DetermineFrom::Signature)
+				.unwrap();
+		}
+	};
+}
+
+test_read!(read_ape, "tests/assets/a.ape");
+test_read!(read_flac, "tests/assets/a.flac");
+test_read!(read_m4a, "tests/assets/a.m4a");
+test_read!(read_mp3, "tests/assets/a.mp3");
+test_read!(read_ogg, "tests/assets/a.ogg");
+test_read!(read_opus, "tests/assets/a.opus");
+test_read!(read_wav, "tests/assets/a.wav");
+
+fn bench_sig(c: &mut Criterion) {
+	c.bench_function("APE - Signature", |b| b.iter(|| read_ape()));
+	c.bench_function("FLAC - Signature", |b| b.iter(|| read_flac()));
+	c.bench_function("MP4 - Signature", |b| b.iter(|| read_m4a()));
+	c.bench_function("MP3 - Signature", |b| b.iter(|| read_mp3()));
+	c.bench_function("OGG - Signature", |b| b.iter(|| read_ogg()));
+	c.bench_function("OPUS - Signature", |b| b.iter(|| read_opus()));
+	c.bench_function("WAV - Signature", |b| b.iter(|| read_wav()));
+}
+
+criterion_group!(benches, bench_sig);
+criterion_main!(benches);

src/tag.rs

@@ -152,7 +152,7 @@ impl TagType {
 			#[cfg(feature = "mp4")]
 			"m4a" | "m4b" | "m4p" | "m4v" | "isom" | "mp4" => Ok(Self::Mp4),
 			#[cfg(feature = "wav")]
-			"wav" | "wave" => Ok(Self::Id3v2),
+			"wav" | "wave" => Ok(Self::Riff(RiffFormat::ID3)),
 			_ => Err(Error::UnsupportedFormat(ext.to_owned())),
 		}
 	}