bench_tools: support deserialization of criterion change

Author: AvivYossef-starkware

crates/bench_tools/src/types/estimates.rs

@@ -1,29 +1,34 @@
 use serde::Deserialize;
 
 /// Criterion benchmark estimates.
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Default)]
 #[allow(dead_code)]
 pub struct Estimates {
     pub mean: Stat,
     pub median: Stat,
-    pub std_dev: Stat,
-    pub median_abs_dev: Stat,
+    #[serde(default)]
+    pub std_dev: Option<Stat>,
+    #[serde(default)]
+    pub median_abs_dev: Option<Stat>,
+    #[serde(default)]
     pub slope: Option<Stat>,
 }
 
 /// Statistical estimate with confidence interval.
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Default)]
 #[allow(dead_code)]
 pub struct Stat {
     pub point_estimate: f64,
+    #[serde(default)]
     pub standard_error: f64,
     pub confidence_interval: ConfidenceInterval,
 }
 
 /// Confidence interval bounds.
-#[derive(Debug, Deserialize)]
+#[derive(Debug, Deserialize, Default)]
 #[allow(dead_code)]
 pub struct ConfidenceInterval {
+    #[serde(default)]
     pub confidence_level: f64,
     pub lower_bound: f64,
     pub upper_bound: f64,