mempool for front page is in its own async call now.

src/CmdLineOptions.cpp

@@ -55,8 +55,8 @@ namespace xmreg
                  "you can specify mainnet url, if you run it on testnet. link will show on front page to mainnet explorer")
                 ("no-blocks-on-index", value<string>()->default_value("10"),
                  "number of last blocks to be shown on index page")
-                ("network-info-timeout", value<string>()->default_value("5000"),
+                ("network-info-timeout", value<string>()->default_value("3000"),
-                 "maximum time, in milliseconds, to wait for network and mempool data availability")
+                 "maximum time, in milliseconds, to wait for mempool data availability")
                 ("bc-path,b", value<string>(),
                  "path to lmdb folder of the blockchain, e.g., ~/.bitmonero/lmdb")
                 ("ssl-crt-file", value<string>(),

src/page.h

@@ -427,12 +427,17 @@ namespace xmreg
 
                 j_info["fee_per_kb"] = fee_estimated;
 
-                // get memory pool rendered template
-                j_info["mempool_html"] = mempool(false, no_of_mempool_tx_of_frontpage);
-
                 return j_info;
             });
 
+
+            // get mempool for the front page also using async future
+            std::future<string> mempool_ftr = std::async(std::launch::async, [&]
+            {
+                // get memory pool rendered template
+                return mempool(false, no_of_mempool_tx_of_frontpage);
+            });
+
             //get current server timestamp
             server_timestamp = std::time(nullptr);
 
@@ -744,13 +749,11 @@ namespace xmreg
             context["cache_misses"] = cache_misses;
 
             // now time to check if we have our networkinfo from network_info future
-            // wait a bit (network_info_timeout millisecond max) if not, just in case, but we dont wait more.
+            // wait a bit (300 millisecond max) if not, just in case, but we dont wait more.
             // if its not ready by now, forget about it.
 
-            string mempool_html {"Cant get mempool_pool"};
-
             std::future_status ftr_status = network_info_ftr.wait_for(
-                    std::chrono::milliseconds(network_info_timeout));
+                    std::chrono::milliseconds(300));
 
             if (ftr_status == std::future_status::ready)
             {
@@ -775,15 +778,27 @@ namespace xmreg
                             {"fee_per_kb"     , print_money(j_network_info["fee_per_kb"])},
                             {"alt_blocks_no"  , j_network_info["alt_blocks_count"].get<uint64_t>()}
                     };
-
-                    mempool_html = j_network_info["mempool_html"];
                 }
             }
             else
             {
-                mempool_html = template_file["mempool_error"];
+                cerr  << "network_info future not ready yet, skipping." << endl;
+            }
+
+            string mempool_html {"Cant get mempool_pool"};
+
+            // get mempool data for the front page, if ready. If not, then just skip.
+            std::future_status mempool_ftr_status = mempool_ftr.wait_for(
+                    std::chrono::milliseconds(network_info_timeout));
 
-                cerr  << "network_info and mempool future not ready yet, skipping." << endl;
+            if (mempool_ftr_status == std::future_status::ready)
+            {
+                mempool_html = mempool_ftr.get();
+            }
+            else
+            {
+                cerr  << "mempool future not ready yet, skipping." << endl;
+                mempool_html = template_file["mempool_error"];
             }
 
             if (CurrentBlockchainStatus::is_thread_running())

src/templates/mempool_error.html

@@ -4,7 +4,7 @@
 <h4 style="font-size: 14px; margin-top: 0px"></h4>
 <div class="center info" style="text-align: center;width:80%;color:#949490">
     
-   <p>Newtork info and mempool data preparation for the front page failed.
+   <p>Mempool data preparation for the front page failed.
     Its processing took longer than expected and it timed out.
     To view mempool without time constrain,
     go to dedicated mempool page: <a href="/mempool">memory pool</a>