Filter only on tested nodes

nym-api/src/simulation_api/handlers/mod.rs

@@ -237,10 +237,15 @@ async fn compare_methods(
         .ok_or_else(|| to_axum_error(SimulationApiError::new("Simulation epoch not found")))?;
 
     // Get simulation performance data
-    let mut performance_data = get_performance_by_method(storage, sim_epoch.epoch_id, "new")
+    let performance_data = get_performance_by_method(storage, sim_epoch.epoch_id, "new")
         .await
         .map_err(to_axum_error)?;
 
+    let mut performance_data: Vec<NodePerformanceData> = performance_data
+        .into_iter()
+        .filter(|p| p.total_samples() > 0)
+        .collect();
+
     // Populate production performance from node annotations cache
     let node_annotations = state
         .node_status_cache

nym-api/src/simulation_api/models.rs

@@ -76,6 +76,12 @@ pub struct NodePerformanceData {
     pub production_performance: Option<f64>,
 }
 
+impl NodePerformanceData {
+    pub fn total_samples(&self) -> u32 {
+        self.positive_samples + self.negative_samples
+    }
+}
+
 impl From<SimulatedNodePerformance> for NodePerformanceData {
     fn from(perf: SimulatedNodePerformance) -> Self {
         Self {

nym-api/src/support/storage/manager.rs

@@ -1789,7 +1789,10 @@ impl StorageManager {
         description: Option<&str>,
     ) -> Result<(i64, bool), sqlx::Error> {
         // Check if simulation already exists
-        if let Some(existing_id) = self.get_existing_simulation_epoch(epoch_id, calculation_method).await? {
+        if let Some(existing_id) = self
+            .get_existing_simulation_epoch(epoch_id, calculation_method)
+            .await?
+        {
             return Ok((existing_id, false)); // Return existing ID and false (not newly created)
         }