mempool: Loading progress added for dumping mempool transactions to disk

src/kernel/mempool_persist.cpp

@@ -184,8 +184,19 @@ bool DumpMempool(const CTxMemPool& pool, const fs::path& dump_path, FopenFn mock
         }
         file.SetXor(xor_key);
 
-        file << (uint64_t)vinfo.size();
+        int mempool_transactions_to_write = (uint64_t)vinfo.size();
+        file << mempool_transactions_to_write;
+        LogInfo("Dumping %u mempool transactions to disk...\n", mempool_transactions_to_write);
+        int next_tenth_to_report = 0;
+        uint64_t mempool_transactions_tried = 0;
         for (const auto& i : vinfo) {
+            const int percentage_done(100.0 * mempool_transactions_tried / mempool_transactions_to_write);
+            if (next_tenth_to_report < percentage_done / 10) {
+                LogInfo("Progress dumping mempool transactions to disk: %d%% (tried %u, %u remaining)\n",
+                        percentage_done, mempool_transactions_tried, mempool_transactions_to_write - mempool_transactions_tried);
+                next_tenth_to_report = percentage_done / 10;
+            }
+            ++mempool_transactions_tried;
             file << TX_WITH_WITNESS(*(i.tx));
             file << int64_t{count_seconds(i.m_time)};
             file << int64_t{i.nFeeDelta};