[bench] BlockAssembler with mempool packages

The current BlockAssembler bench only tests on a mempool where all
transactions have 0 ancestors or descendants, which does not exercise
any of the package-handling logic in BlockAssembler

Author: glozow

src/bench/block_assemble.cpp

@@ -5,6 +5,7 @@
 #include <bench/bench.h>
 #include <consensus/validation.h>
 #include <crypto/sha256.h>
+#include <node/miner.h>
 #include <test/util/mining.h>
 #include <test/util/script.h>
 #include <test/util/setup_common.h>
@@ -45,5 +46,18 @@ static void AssembleBlock(benchmark::Bench& bench)
         PrepareBlock(test_setup->m_node, P2WSH_OP_TRUE);
     });
 }
+static void BlockAssemblerAddPackageTxns(benchmark::Bench& bench)
+{
+    FastRandomContext det_rand{true};
+    auto testing_setup{MakeNoLogFileContext<TestChain100Setup>()};
+    testing_setup->PopulateMempool(det_rand, /*num_transactions=*/1000, /*submit=*/true);
+    node::BlockAssembler::Options assembler_options;
+    assembler_options.test_block_validity = false;
+
+    bench.run([&] {
+        PrepareBlock(testing_setup->m_node, P2WSH_OP_TRUE, assembler_options);
+    });
+}
 
 BENCHMARK(AssembleBlock, benchmark::PriorityLevel::HIGH);
+BENCHMARK(BlockAssemblerAddPackageTxns, benchmark::PriorityLevel::LOW);