Add limit and shrink policy for recycler (#15320)

perf/benches/recycler.rs

@@ -0,0 +1,22 @@
+#![feature(test)]
+
+extern crate test;
+
+use solana_perf::{packet::PacketsRecycler, recycler::Recycler};
+
+use test::Bencher;
+
+#[bench]
+fn bench_recycler(bencher: &mut Bencher) {
+    solana_logger::setup();
+
+    let recycler: PacketsRecycler = Recycler::new_without_limit("me");
+
+    for _ in 0..1000 {
+        recycler.recycle_for_test(recycler.allocate().expect("There is no limit"));
+    }
+
+    bencher.iter(move || {
+        recycler.recycle_for_test(recycler.allocate().expect("There is no limit"));
+    });
+}