chore: checkpoint before Python removal

vendor/sha2/benches/mod.rs

@@ -0,0 +1,22 @@
+#![feature(test)]
+extern crate test;
+
+use digest::bench_update;
+use sha2::{Sha256, Sha512};
+use test::Bencher;
+
+bench_update!(
+    Sha256::default();
+    sha256_10 10;
+    sha256_100 100;
+    sha256_1000 1000;
+    sha256_10000 10000;
+);
+
+bench_update!(
+    Sha512::default();
+    sha512_10 10;
+    sha512_100 100;
+    sha512_1000 1000;
+    sha512_10000 10000;
+);