Add nostr bench tooling and mix bench comparison

nix/nostr-bench.nix

@@ -0,0 +1,28 @@
+{
+  lib,
+  fetchFromGitHub,
+  rustPlatform,
+}:
+rustPlatform.buildRustPackage rec {
+  pname = "nostr-bench";
+  version = "0.4.0";
+
+  src = fetchFromGitHub {
+    owner = "rnostr";
+    repo = pname;
+    rev = "d3ab701512b7c871707b209ef3f934936e407963";
+    hash = "sha256-F2qg1veO1iNlVUKf1b/MV+vexiy4Tt+w2aikDDbp7tU=";
+  };
+
+  cargoHash = "sha256-mh9UdYhZl6JVJEeDFnY5BjfcK+PrWBBEn1Qh7/ZX17k=";
+
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Nostr relay benchmarking tool";
+    homepage = "https://github.com/rnostr/nostr-bench";
+    license = licenses.mit;
+    mainProgram = "nostr-bench";
+    platforms = platforms.unix;
+  };
+}