bench: put addrman check ratio in a variable

So that it is easy to modify through the file `bench/addrman.cpp`.

Author: vasild

src/bench/addrman.cpp

@@ -16,6 +16,9 @@
 static constexpr size_t NUM_SOURCES = 64;
 static constexpr size_t NUM_ADDRESSES_PER_SOURCE = 256;
 
+static const std::vector<bool> EMPTY_ASMAP;
+static constexpr uint32_t ADDRMAN_CONSISTENCY_CHECK_RATIO{0};
+
 static std::vector<CAddress> g_sources;
 static std::vector<std::vector<CAddress>> g_addresses;
 
@@ -74,14 +77,14 @@ static void AddrManAdd(benchmark::Bench& bench)
     CreateAddresses();
 
     bench.run([&] {
-        AddrMan addrman{/* asmap */ std::vector<bool>(), /* deterministic */ false, /* consistency_check_ratio */ 0};
+        AddrMan addrman{EMPTY_ASMAP, /*deterministic=*/false, ADDRMAN_CONSISTENCY_CHECK_RATIO};
         AddAddressesToAddrMan(addrman);
     });
 }
 
 static void AddrManSelect(benchmark::Bench& bench)
 {
-    AddrMan addrman(/* asmap */ std::vector<bool>(), /* deterministic */ false, /* consistency_check_ratio */ 0);
+    AddrMan addrman{EMPTY_ASMAP, /*deterministic=*/false, ADDRMAN_CONSISTENCY_CHECK_RATIO};
 
     FillAddrMan(addrman);
 
@@ -93,7 +96,7 @@ static void AddrManSelect(benchmark::Bench& bench)
 
 static void AddrManGetAddr(benchmark::Bench& bench)
 {
-    AddrMan addrman(/* asmap */ std::vector<bool>(), /* deterministic */ false, /* consistency_check_ratio */ 0);
+    AddrMan addrman{EMPTY_ASMAP, /*deterministic=*/false, ADDRMAN_CONSISTENCY_CHECK_RATIO};
 
     FillAddrMan(addrman);
 
@@ -122,7 +125,7 @@ static void AddrManAddThenGood(benchmark::Bench& bench)
         //
         // This has some overhead (exactly the result of AddrManAdd benchmark), but that overhead is constant so improvements in
         // AddrMan::Good() will still be noticeable.
-        AddrMan addrman(/* asmap */ std::vector<bool>(), /* deterministic */ false, /* consistency_check_ratio */ 0);
+        AddrMan addrman{EMPTY_ASMAP, /*deterministic=*/false, ADDRMAN_CONSISTENCY_CHECK_RATIO};
         AddAddressesToAddrMan(addrman);
 
         markSomeAsGood(addrman);