Add standalone bench target

Bench.cpp

@@ -0,0 +1,45 @@
+#include "ConflictSet.h"
+
+#define ANKERL_NANOBENCH_IMPLEMENT
+#include "third_party/nanobench.h"
+
+std::string toKey(int n) {
+  std::string result;
+  result.resize(32);
+
+  for (int i = 0; i < 32; ++i) {
+    result[i] = n & (1 << (31 - i)) ? '1' : '0';
+  }
+  return result;
+}
+
+constexpr int kNumKeys = 100000;
+
+int main(void) {
+  ankerl::nanobench::Bench bench;
+
+  int readKey = kNumKeys / 2;
+
+  ConflictSet cs(0);
+  for (int i = 0; i < kNumKeys; ++i) {
+    if (i != readKey) {
+      continue;
+    }
+    auto key = toKey(i);
+    ConflictSet::WriteRange w;
+    w.begin.p = (const uint8_t *)key.data();
+    w.begin.len = key.size();
+    w.end.len = 0;
+    w.writeVersion = 1;
+    cs.addWrites(&w, 1);
+  }
+
+  auto key = toKey(readKey);
+  ConflictSet::ReadRange r;
+  r.begin.p = (const uint8_t *)key.data();
+  r.begin.len = key.size();
+  r.end.len = 0;
+  r.readVersion = 0;
+  ConflictSet::Result result;
+  bench.run("point read", [&]() { cs.check(&r, &result, 1); });
+}