bench: Add benchmark for CRollingBloomFilter::reset

src/bench/rollingbloom.cpp

@@ -28,4 +28,13 @@ static void RollingBloom(benchmark::State& state)
     }
 }
 
+static void RollingBloomReset(benchmark::State& state)
+{
+    CRollingBloomFilter filter(120000, 0.000001);
+    while (state.KeepRunning()) {
+        filter.reset();
+    }
+}
+
 BENCHMARK(RollingBloom, 1500 * 1000);
+BENCHMARK(RollingBloomReset, 20000);