break loop early on 0 curr strain

src/mania/mod.rs

@@ -89,11 +89,9 @@ impl<'map> ManiaStars<'map> {
     /// Adjust the clock rate used in the calculation.
     /// If none is specified, it will take the clock rate based on the mods
     /// i.e. 1.5 for DT, 0.75 for HT and 1.0 otherwise.
-    ///
-    /// The value cannot go below 0.001.
     #[inline]
     pub fn clock_rate(mut self, clock_rate: f64) -> Self {
-        self.clock_rate = Some(clock_rate.max(0.001));
+        self.clock_rate = Some(clock_rate);
 
         self
     }

src/mania/pp.rs

@@ -120,11 +120,9 @@ impl<'map> ManiaPP<'map> {
     /// Adjust the clock rate used in the calculation.
     /// If none is specified, it will take the clock rate based on the mods
     /// i.e. 1.5 for DT, 0.75 for HT and 1.0 otherwise.
-    ///
-    /// The value cannot go below 0.001.
     #[inline]
     pub fn clock_rate(mut self, clock_rate: f64) -> Self {
-        self.clock_rate = Some(clock_rate.max(0.001));
+        self.clock_rate = Some(clock_rate);
 
         self
     }

src/mania/skills/traits.rs

@@ -30,6 +30,18 @@ pub(crate) trait StrainSkill: Sized + Skill {
             self.save_curr_peak();
             self.start_new_section_from(self.curr_section_end(), curr, diff_objects);
             *self.curr_section_end_mut() += SECTION_LEN;
+
+            // Optimization to finish the loop early if
+            // the current peak is 0.0 i.e. it can't decay further.
+            // If final values don't coincide perfectly anymore,
+            // this should be looked at and maybe adjusted.
+            if self.curr_section_peak().abs() <= f64::EPSILON
+                && curr.start_time > self.curr_section_end()
+            {
+                let remaining = curr.start_time - self.curr_section_end();
+                let skip_iter_count = (remaining / SECTION_LEN).ceil();
+                *self.curr_section_end_mut() += skip_iter_count * SECTION_LEN;
+            }
         }
 
         *self.curr_section_peak_mut() = self.strain_value_at(curr).max(self.curr_section_peak());