concurrency option added

main.cpp

@@ -75,6 +75,7 @@ main(int ac, const char* av[])
     auto enable_json_api_opt           = opts.get_option<bool>("enable-json-api");
     auto enable_as_hex_opt             = opts.get_option<bool>("enable-as-hex");
     auto enable_tx_cache_opt           = opts.get_option<bool>("enable-tx-cache");
+    auto concurrency_opt               = opts.get_option<size_t>("concurrency");
     auto enable_block_cache_opt        = opts.get_option<bool>("enable-block-cache");
     auto show_cache_times_opt          = opts.get_option<bool>("show-cache-times");
     auto enable_emission_monitor_opt   = opts.get_option<bool>("enable-emission-monitor");
@@ -865,10 +866,17 @@ main(int ac, const char* av[])
     else
     {
         cout << "Staring in non-ssl mode" << endl;
-        app.bindaddr(bindaddr).port(app_port).multithreaded().run();
+        if (*concurrency_opt == 0)
+        {
+            app.bindaddr(bindaddr).port(app_port).multithreaded().run();
+        }
+        else
+        {
+            app.bindaddr(bindaddr).port(app_port)
+                .concurrency(*concurrency_opt).run();
+        }
     }
 
-
     if (enable_emission_monitor == true)
     {
         // finish Emission monitoring thread in a cotrolled manner.

src/CmdLineOptions.cpp

@@ -67,6 +67,8 @@ namespace xmreg
                  "maximum time, in milliseconds, to wait for mempool data for the front page")
                 ("mempool-refresh-time", value<string>()->default_value("5"),
                  "time, in seconds, for each refresh of mempool state")
+                ("concurrency,c", value<size_t>()->default_value(0),
+                 "number of threads handling http queries. Default is 0 which means it is based you on the cpu")
                 ("bc-path,b", value<string>(),
                  "path to lmdb folder of the blockchain, e.g., ~/.bitmonero/lmdb")
                 ("ssl-crt-file", value<string>(),