Index: append-only-vec/benches/bench.rs
===================================================================
--- append-only-vec.orig/benches/bench.rs
+++ append-only-vec/benches/bench.rs
@@ -140,11 +140,11 @@ fn main() {
                 |n: usize| {
                     let vec = AppendOnlyVec::new();
                     for i in 0..n {
-                        vec.push(i);
+                        vec.push(i as u64);
                     }
                     vec
                 },
-                |vec| { vec.iter().copied().sum::<usize>() },
+                |vec| { vec.iter().copied().sum::<u64>() },
                 min_n
             )
         );
@@ -154,11 +154,11 @@ fn main() {
                 |n: usize| {
                     let vec = AppendOnlyVec::new();
                     for i in 0..n {
-                        vec.push(i);
+                        vec.push(i as u64);
                     }
                     vec
                 },
-                |vec| { vec.iter().copied().rev().sum::<usize>() },
+                |vec| { vec.iter().copied().rev().sum::<u64>() },
                 min_n
             )
         );
@@ -168,11 +168,11 @@ fn main() {
                 |n: usize| {
                     let mut vec = Vec::new();
                     for i in 0..n {
-                        vec.push(i);
+                        vec.push(i as u64);
                     }
                     vec
                 },
-                |vec| { vec.iter().copied().sum::<usize>() },
+                |vec| { vec.iter().copied().sum::<u64>() },
                 min_n
             )
         );
@@ -192,7 +192,7 @@ fn main() {
                 |vec| {
                     let mut sum = 0;
                     for i in 0..vec.len() {
-                        sum += vec[i];
+                        sum += vec[i] as u64;
                     }
                     sum
                 },
@@ -212,7 +212,7 @@ fn main() {
                 |vec| {
                     let mut sum = 0;
                     for i in 0..vec.len() {
-                        sum += vec.get(i);
+                        sum += vec.get(i) as u64;
                     }
                     sum
                 },
@@ -232,7 +232,7 @@ fn main() {
                 |vec| {
                     let mut sum = 0;
                     for i in 0..vec.len() {
-                        sum += vec.get(i);
+                        sum += vec.get(i) as u64;
                     }
                     sum
                 },
@@ -252,7 +252,7 @@ fn main() {
                 |vec| {
                     let mut sum = 0;
                     for i in 0..vec.len() {
-                        sum += vec[i];
+                        sum += vec[i] as u64;
                     }
                     sum
                 },
@@ -276,7 +276,7 @@ fn main() {
                     let mut sum = 0;
                     let n = vec.len();
                     for i in 0..n {
-                        sum += vec[n - 1 - i];
+                        sum += vec[n - 1 - i] as u64;
                     }
                     sum
                 },
@@ -297,7 +297,7 @@ fn main() {
                     let mut sum = 0;
                     let n = vec.len();
                     for i in 0..n {
-                        sum += vec.get(n - 1 - i);
+                        sum += vec.get(n - 1 - i) as u64;
                     }
                     sum
                 },
@@ -318,7 +318,7 @@ fn main() {
                     let mut sum = 0;
                     let n = vec.len();
                     for i in 0..n {
-                        sum += vec.get(n - 1 - i);
+                        sum += vec.get(n - 1 - i) as u64;
                     }
                     sum
                 },
@@ -339,7 +339,7 @@ fn main() {
                     let mut sum = 0;
                     let n = vec.len();
                     for i in 0..n {
-                        sum += vec[n - 1 - i];
+                        sum += vec[n - 1 - i] as u64;
                     }
                     sum
                 },