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diff --git a/src/Makefile.bench.include b/src/Makefile.bench.include
--- a/src/Makefile.bench.include
+++ b/src/Makefile.bench.include
@@ -15,6 +15,7 @@
bench/bench_bitcoin.cpp \
bench/bench.cpp \
bench/bench.h \
+ bench/block_assemble.cpp \
bench/cashaddr.cpp \
bench/checkblock.cpp \
bench/checkqueue.cpp \
diff --git a/src/bench/CMakeLists.txt b/src/bench/CMakeLists.txt
--- a/src/bench/CMakeLists.txt
+++ b/src/bench/CMakeLists.txt
@@ -37,6 +37,7 @@
base58.cpp
bench.cpp
bench_bitcoin.cpp
+ block_assemble.cpp
cashaddr.cpp
ccoins_caching.cpp
checkblock.cpp
diff --git a/src/bench/block_assemble.cpp b/src/bench/block_assemble.cpp
new file mode 100644
--- /dev/null
+++ b/src/bench/block_assemble.cpp
@@ -0,0 +1,91 @@
+// Copyright (c) 2011-2017 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <bench/bench.h>
+#include <chainparams.h>
+#include <config.h>
+#include <consensus/merkle.h>
+#include <consensus/validation.h>
+#include <miner.h>
+#include <policy/policy.h>
+#include <pow.h>
+#include <txmempool.h>
+#include <validation.h>
+
+#include <vector>
+
+static std::shared_ptr<CBlock>
+PrepareBlock(const Config &config, const CScript &coinbase_scriptPubKey) {
+ auto block =
+ std::make_shared<CBlock>(BlockAssembler{config, ::g_mempool}
+ .CreateNewBlock(coinbase_scriptPubKey)
+ ->block);
+
+ block->nTime = ::ChainActive().Tip()->GetMedianTimePast() + 1;
+ block->hashMerkleRoot = BlockMerkleRoot(*block);
+
+ return block;
+}
+
+static CTxIn MineBlock(const Config &config,
+ const CScript &coinbase_scriptPubKey) {
+ auto block = PrepareBlock(config, coinbase_scriptPubKey);
+
+ while (!CheckProofOfWork(block->GetHash(), block->nBits,
+ config.GetChainParams().GetConsensus())) {
+ ++block->nNonce;
+ assert(block->nNonce);
+ }
+
+ bool processed = ProcessNewBlock(config, block, true, nullptr);
+ assert(processed);
+
+ return CTxIn{block->vtx[0]->GetId(), 0};
+}
+
+static void AssembleBlock(benchmark::State &state) {
+ const Config &config = GetConfig();
+
+ const CScript redeemScript = CScript() << OP_DROP << OP_TRUE;
+ const CScript SCRIPT_PUB =
+ CScript() << OP_HASH160 << ToByteVector(CScriptID(redeemScript))
+ << OP_EQUAL;
+
+ const CScript scriptSig = CScript() << std::vector<uint8_t>(100, 0xff)
+ << ToByteVector(redeemScript);
+
+ // Collect some loose transactions that spend the coinbases of our mined
+ // blocks
+ constexpr size_t NUM_BLOCKS{200};
+ std::array<CTransactionRef, NUM_BLOCKS - COINBASE_MATURITY + 1> txs;
+ for (size_t b = 0; b < NUM_BLOCKS; ++b) {
+ CMutableTransaction tx;
+ tx.vin.push_back(MineBlock(config, SCRIPT_PUB));
+ tx.vin.back().scriptSig = scriptSig;
+ tx.vout.emplace_back(1337 * SATOSHI, SCRIPT_PUB);
+ if (NUM_BLOCKS - b >= COINBASE_MATURITY) {
+ txs.at(b) = MakeTransactionRef(tx);
+ }
+ }
+
+ {
+ // Required for ::AcceptToMemoryPool.
+ LOCK(::cs_main);
+
+ for (const auto &txr : txs) {
+ CValidationState vstate;
+ bool ret{::AcceptToMemoryPool(config, ::g_mempool, vstate, txr,
+ nullptr /* pfMissingInputs */,
+ false /* bypass_limits */,
+ /* nAbsurdFee */ Amount::zero())};
+ assert(ret);
+ }
+ }
+
+ while (state.KeepRunning()) {
+ PrepareBlock(config, SCRIPT_PUB);
+ }
+}
+
+BENCHMARK(AssembleBlock, 700);

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