Always collect memory usage info in analysis-stats

crates/profile/src/stop_watch.rs

@@ -10,13 +10,13 @@ pub struct StopWatch {
     time: Instant,
     #[cfg(target_os = "linux")]
     counter: Option<perf_event::Counter>,
-    memory: Option<MemoryUsage>,
+    memory: MemoryUsage,
 }
 
 pub struct StopWatchSpan {
     pub time: Duration,
     pub instructions: Option<u64>,
-    pub memory: Option<MemoryUsage>,
+    pub memory: MemoryUsage,
 }
 
 impl StopWatch {
@@ -45,20 +45,16 @@ impl StopWatch {
                 None
             }
         };
+        let memory = MemoryUsage::now();
         let time = Instant::now();
         StopWatch {
             time,
             #[cfg(target_os = "linux")]
             counter,
-            memory: None,
+            memory,
         }
     }
-    pub fn memory(mut self, yes: bool) -> StopWatch {
-        if yes {
-            self.memory = Some(MemoryUsage::now());
-        }
-        self
-    }
+
     pub fn elapsed(&mut self) -> StopWatchSpan {
         let time = self.time.elapsed();
 
@@ -69,7 +65,7 @@ impl StopWatch {
         #[cfg(not(target_os = "linux"))]
         let instructions = None;
 
-        let memory = self.memory.map(|it| MemoryUsage::now() - it);
+        let memory = MemoryUsage::now() - self.memory;
         StopWatchSpan { time, instructions, memory }
     }
 }
@@ -93,9 +89,7 @@ impl fmt::Display for StopWatchSpan {
             }
             write!(f, ", {instructions}{prefix}instr")?;
         }
-        if let Some(memory) = self.memory {
-            write!(f, ", {memory}")?;
-        }
+        write!(f, ", {}", self.memory)?;
         Ok(())
     }
 }