add benches

Cargo.toml

@@ -22,6 +22,19 @@ name = "grass"
 path = "src/lib.rs"
 crate-type = ["cdylib", "rlib"]
 
+[[bench]]
+name = "numbers"
+harness = false
+
+[[bench]]
+name = "control_flow"
+harness = false
+
+[[bench]]
+name = "styles"
+harness = false
+
+
 [dependencies]
 clap = { version = "2.33.0", optional = true }
 num-rational = "0.2.3"
@@ -49,6 +62,7 @@ profiling = []
 [dev-dependencies]
 tempfile = "3"
 paste = "0.1"
+criterion = "0.3.2"
 
 [profile.release]
 debug = true

benches/control_flow.rs

@@ -0,0 +1,11 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use grass::StyleSheet;
+
+pub fn big_for(c: &mut Criterion) {
+    c.bench_function("big_for", |b| {
+        b.iter(|| StyleSheet::new(black_box(include_str!("big_for.scss").to_string())))
+    });
+}
+
+criterion_group!(benches, big_for);
+criterion_main!(benches);

benches/numbers.rs

@@ -0,0 +1,27 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use grass::StyleSheet;
+
+pub fn many_floats(c: &mut Criterion) {
+    c.bench_function("many_floats", |b| {
+        b.iter(|| StyleSheet::new(black_box(include_str!("many_floats.scss").to_string())))
+    });
+}
+
+pub fn many_integers(c: &mut Criterion) {
+    c.bench_function("many_integers", |b| {
+        b.iter(|| StyleSheet::new(black_box(include_str!("many_integers.scss").to_string())))
+    });
+}
+
+pub fn many_small_integers(c: &mut Criterion) {
+    c.bench_function("many_small_integers", |b| {
+        b.iter(|| {
+            StyleSheet::new(black_box(
+                include_str!("many_small_integers.scss").to_string(),
+            ))
+        })
+    });
+}
+
+criterion_group!(benches, many_floats, many_integers, many_small_integers);
+criterion_main!(benches);

benches/styles.rs

@@ -0,0 +1,11 @@
+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+use grass::StyleSheet;
+
+pub fn many_foo(c: &mut Criterion) {
+    c.bench_function("many_foo", |b| {
+        b.iter(|| StyleSheet::new(black_box(include_str!("many_foo.scss").to_string())))
+    });
+}
+
+criterion_group!(benches, many_foo);
+criterion_main!(benches);