Use skip_serializing_if

src/hyperfine/export/csv.rs

@@ -4,21 +4,6 @@ use std::io::{Error, ErrorKind, Result};
 
 use csv::WriterBuilder;
 
-use hyperfine::internal::Second;
-
-/// Set of values that will be exported.
-#[derive(Debug, Serialize)]
-pub struct CsvEntry {
-    command: String,
-    mean: Second,
-    stddev: Second,
-    user: Second,
-    system: Second,
-    min: Second,
-    max: Second,
-}
-
-
 #[derive(Default)]
 pub struct CsvExporter {}
 
@@ -26,15 +11,11 @@ impl Exporter for CsvExporter {
     fn serialize(&self, results: &Vec<ExportEntry>) -> Result<Vec<u8>> {
         let mut writer = WriterBuilder::new().from_writer(vec![]);
         for res in results {
-            writer.serialize(&CsvEntry {
-                command: res.command.clone(),
-                mean: res.mean,
-                stddev: res.stddev,
-                user: res.user,
-                system: res.system,
-                min: res.min,
-                max: res.max,
-            })?;
+            // The list of times can not be exported to the CSV file - remove it:
+            let mut result = res.clone();
+            result.times = None;
+
+            writer.serialize(result)?;
         }
 
         writer

src/hyperfine/export/mod.rs

@@ -36,7 +36,8 @@ pub struct ExportEntry {
     max: Second,
 
     /// All run time measurements
-    times: Vec<Second>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    times: Option<Vec<Second>>,
 }
 
 impl ExportEntry {
@@ -59,7 +60,7 @@ impl ExportEntry {
             system,
             min,
             max,
-            times,
+            times: Some(times),
         }
     }
 }