refactor(ratecontroller): Simplify delta_stat logic

src/ratecontroller.rs

@@ -151,10 +151,7 @@ impl Ratecontroller {
         if !state.deltas.is_empty() {
             state.next_rate = state.current_rate;
 
-            if state.deltas.len() < 3 {
-                state.next_rate = min_rate;
-            } else {
-                state.delta_stat = if state.deltas[2] > 0.0 {
+            state.delta_stat = if state.deltas.len() >= 3 {
                 state.deltas[2]
             } else {
                 state.deltas[0]
@@ -171,8 +168,7 @@ impl Ratecontroller {
                     / dur.as_secs_f64();
                 state.load = state.utilisation / state.current_rate;
 
-                    if state.delta_stat > 0.0
-                        && state.delta_stat < delay_ms
+                if state.delta_stat < delay_ms
                     && state.load > self.config.high_load_level
                 {
                     state.safe_rates[state.nrate] = (state.current_rate * state.load).round();
@@ -202,7 +198,6 @@ impl Ratecontroller {
                 }
             }
         }
-        }
 
         state.next_rate = state.next_rate.max(min_rate).round();
         state.previous_bytes = state.current_bytes;