Revert me: Add shallow benchmark for a first impression

core/executor/src/heap.rs

@@ -19,6 +19,7 @@
 
 use log::trace;
 use std::collections::HashMap;
+use std::time::{Duration, Instant};
 
 // The pointers need to be aligned to 8 bytes.
 const ALIGNMENT: usize = 8;
@@ -38,6 +39,7 @@ pub struct Heap {
 	heap: Vec<u8>,
 	max_heap_size: usize,
 	ptr_offset: usize,
+	start: Instant,
 	total_size: usize,
 }
 
@@ -56,6 +58,7 @@ impl Heap {
 	///   allocating memory.
 	///
 	pub fn new(mut ptr_offset: usize, heap_size: usize) -> Self {
+		eprintln!("Creating heap");
 		let padding = ptr_offset % ALIGNMENT;
 		if padding != 0 {
 			ptr_offset += ALIGNMENT - padding;
@@ -68,6 +71,7 @@ impl Heap {
 			heap: vec![0; heap_size],
 			max_heap_size: heap_size,
 			ptr_offset,
+			start: Instant::now(),
 			total_size: 0,
 		}
 	}
@@ -155,6 +159,13 @@ impl Heap {
 
 }
 
+impl Drop for Heap {
+	fn drop(&mut self) {
+		let duration = self.start.elapsed();
+		eprintln!("Dropping heap after {:?}", duration);
+	}
+}
+
 #[cfg(test)]
 mod tests {
 	use super::*;