Added mem-dbg across crate as optional featuew

Cargo.toml

@@ -37,4 +37,5 @@ serde_json = "1.0"
 siphasher = "0.3.3"
 
 [dependencies]
+mem_dbg = {version="0.2.4", optional=true}
 serde = { version = "1.0", default-features = false, features = ["derive"] }

evaluation/src/main.rs

@@ -12,6 +12,7 @@ use rayon::prelude::*;
 
 use hyperloglogplus::{HyperLogLog, HyperLogLogPF, HyperLogLogPlus};
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 struct PassThroughHasher(u64);
 
 impl Hasher for PassThroughHasher {
@@ -30,6 +31,7 @@ impl Hasher for PassThroughHasher {
     }
 }
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 struct PassThroughHasherBuilder;
 
 impl BuildHasher for PassThroughHasherBuilder {
@@ -40,6 +42,7 @@ impl BuildHasher for PassThroughHasherBuilder {
     }
 }
 
+#[cfg_attr(feature = "mem_dbg", derive(mem_dbg::MemDbg, mem_dbg::MemSize))]
 struct Estimation(u64, u64);
 
 impl fmt::Display for Estimation {

src/common.rs

@@ -8,6 +8,10 @@ macro_rules! registers_impls {
     ($len:expr, $ident:ident) => {
         // A Registers struct.
         #[derive(Clone, Debug, Serialize, Deserialize)]
+        #[cfg_attr(
+            feature = "mem_dbg",
+            derive(mem_dbg::MemDbg, mem_dbg::MemSize)
+        )]
         pub struct $ident {
             // A buffer containing registers.
             buf:   Vec<u32>,