Rename ArenaAllocator -> Arena

benchmarks/bench_arena.cpp

@@ -0,0 +1,39 @@
+#include "arena.hpp"
+
+#include <nanobench.h>
+#include <vector>
+
+int main() {
+  // Small allocation benchmark - Arena vs malloc
+  for (int alloc_size : {16, 64, 256, 1024}) {
+    auto bench = ankerl::nanobench::Bench()
+                     .title("Small Allocations (" + std::to_string(alloc_size) +
+                            " bytes)")
+                     .unit("allocation")
+                     .warmup(100);
+
+    {
+      // Arena allocator benchmark
+      Arena arena;
+      bench.run("Arena", [&] {
+        void *ptr = arena.allocate_raw(alloc_size);
+        ankerl::nanobench::doNotOptimizeAway(ptr);
+      });
+    }
+
+    {
+      // Standard malloc benchmark
+      std::vector<void *> malloc_ptrs;
+      malloc_ptrs.reserve(1'000'000);
+      bench.run("malloc", [&] {
+        void *ptr = std::malloc(alloc_size);
+        malloc_ptrs.push_back(ptr);
+      });
+      for (void *ptr : malloc_ptrs) {
+        std::free(ptr);
+      }
+    }
+  }
+
+  return 0;
+}