Add new setting to determine how many blocks to sync before saving stats

app.js

@@ -306,6 +306,7 @@ app.set('genesis_block', settings.genesis_block);
 app.set('index', settings.index);
 app.set('use_rpc', settings.use_rpc);
 app.set('heavy', settings.heavy);
+app.set('save_stats_after_sync_blocks', settings.save_stats_after_sync_blocks);
 app.set('lock_during_index', settings.lock_during_index);
 app.set('txcount', settings.txcount);
 app.set('txcount_per_page', settings.txcount_per_page);

lib/database.js

@@ -808,7 +808,7 @@ module.exports = {
             blocks_to_scan.push(i);
           }
           async.eachLimit(blocks_to_scan, task_limit_blocks, function(block_height, next_block) {
-            if (block_height % 5000 === 0) {
+            if (block_height % settings.save_stats_after_sync_blocks === 0) {
               Stats.updateOne({coin: coin}, {
                 last: block_height - 1,
                 txes: txes,

lib/settings.js

@@ -159,6 +159,7 @@ exports.genesis_block = "0000860fcf946b44df0e7d85d6757d45f8de6f4c9aacc5c7b6abc13
 
 exports.use_rpc = true;
 exports.heavy = false;
+exports.save_stats_after_sync_blocks = 100;
 exports.lock_during_index = false;
 exports.txcount = 100;
 exports.txcount_per_page = 50;

settings.json.template

@@ -180,6 +180,9 @@
 
   //heavy (enable/disable additional heavy features)
   "heavy": false,
+  
+  //during index syncronization, stats are saved updated after processing this many blocks to save time
+  "save_stats_after_sync_blocks": 100,
 
   //disable saving blocks & TXs via API during indexing.
   "lock_during_index": false,