Update the setup file to include a hook

setHasher.mjs

@@ -1,7 +1,20 @@
 // Set the hasher to hashtree
 // Used to run benchmarks with with visibility into hashtree performance, useful for Lodestar
+import {beforeEach} from "@chainsafe/benchmark";
 import {setHasher} from "@chainsafe/persistent-merkle-tree/lib/cjs/hasher/index.js";
 import {hasher} from "@chainsafe/persistent-merkle-tree/lib/cjs/hasher/hashtree.js";
 setHasher(hasher);
 
+beforeEach(() => {
+  console.log("-----------------------------------");
+  const memory = process.memoryUsage();
+  console.log(
+    `HT: ${(memory.heapTotal / 1024 / 1024).toFixed(2)}MB, HU: ${(
+      memory.heapUsed /
+      1024 /
+      1024
+    ).toFixed(2)}MB, RSS: ${(memory.rss / 1024 / 1024).toFixed(2)}MB`
+  );
+});
+
 export {};