micro optimizations

src/taiko/hitobject_rhythm.rs

@@ -50,8 +50,8 @@ pub(crate) struct HitObjectRhythm {
 impl PartialEq for HitObjectRhythm {
     #[inline]
     fn eq(&self, other: &Self) -> bool {
-        (self.ratio - other.ratio).abs() < f32::EPSILON
-            && (self.difficulty - other.difficulty).abs() < f32::EPSILON
+        (self.ratio - other.ratio).abs() <= f32::EPSILON
+            && (self.difficulty - other.difficulty).abs() <= f32::EPSILON
     }
 }
 

src/taiko/mod.rs

@@ -209,7 +209,7 @@ fn rescale(stars: f32) -> f32 {
     if stars < 0.0 {
         stars
     } else {
-        10.43 * (stars / 8.0 + 1.0).ln()
+        10.43 * (stars / 8.0).ln_1p()
     }
 }
 

src/taiko/skill_kind.rs

@@ -150,7 +150,7 @@ impl SkillKind {
                 *current_strain *= RHYTHM_STRAIN_DECAY;
                 *notes_since_rhythm_change += 1;
 
-                if current.rhythm.difficulty.abs() < f32::EPSILON {
+                if current.rhythm.difficulty.abs() <= f32::EPSILON {
                     return 0.0;
                 }