use proper default capacities

src/osu/convert.rs

@@ -34,7 +34,8 @@ pub fn convert_objects(
     attrs: &mut OsuDifficultyAttributes,
 ) -> Vec<OsuObject> {
     let mut curve_bufs = CurveBuffers::default();
-    let mut ticks_buf = Vec::new(); // TODO: default capacity
+    // mean=5.16 | median=4
+    let mut ticks_buf = Vec::new();
 
     let mut osu_objects: Vec<_> = converted
         .map

src/osu/difficulty/skills/speed.rs

@@ -29,7 +29,8 @@ impl Speed {
         Self {
             curr_strain: 0.0,
             curr_rhythm: 0.0,
-            object_strains: Vec::new(), // TODO: default capacity
+            // mean=406.72 | median=307
+            object_strains: Vec::with_capacity(256),
             hit_window,
             inner: OsuStrainSkill::default(),
         }