diff --git a/src/mmr/runner.rs b/src/mmr/runner.rs
index 7703dca5..e4b46854 100644
--- a/src/mmr/runner.rs
+++ b/src/mmr/runner.rs
@@ -13,6 +13,15 @@ use cmmr::MMR;
 use reqwest::Client;
 use rocksdb::{IteratorMode, DB};
 use std::{env, sync::Arc, time};
+use std::time::{SystemTime, UNIX_EPOCH};
+
+fn now() -> u128 {
+    let start = SystemTime::now();
+    let since_the_epoch = start
+        .duration_since(UNIX_EPOCH)
+        .expect("Time went backwards");
+    since_the_epoch.as_millis()
+}
 
 /// MMR Runner
 #[derive(Clone)]
@@ -35,34 +44,40 @@ impl From<ShadowShared> for Runner {
 impl Runner {
     /// Start the runner
     pub async fn start(&mut self) -> Result<(), Error> {
-        let mut ptr = {
-            let last_leaf =
-                helper::mmr_size_to_last_leaf(self.db.iterator(IteratorMode::Start).count() as i64);
+        let mut mmr_size = self.db.iterator(IteratorMode::Start).count() as u64;
+        let last_leaf = helper::mmr_size_to_last_leaf(mmr_size as i64);
+        let mut ptr =
             if last_leaf == 0 {
                 0
             } else {
                 last_leaf + 1
-            }
-        };
+            };
 
         loop {
-            if let Err(e) = self.push(ptr).await {
-                trace!("Push block to mmr_store failed: {:?}", e);
-                trace!("MMR service restarting after 10s...");
-                actix_rt::time::delay_for(time::Duration::from_secs(10)).await;
-            } else {
-                if ptr
-                    % env::var("MMR_LOG")
+            debug!("-{}-{}------------", ptr, mmr_size);
+            let a = now();
+            match self.push(ptr, mmr_size).await {
+                Err(e) => {
+                    trace!("Push block to mmr_store failed: {:?}", e);
+                    trace!("MMR service restarting after 10s...");
+                    actix_rt::time::delay_for(time::Duration::from_secs(10)).await;
+                },
+                Ok(mmr_size_new) => {
+                    if ptr
+                        % env::var("MMR_LOG")
                         .unwrap_or_else(|_| "10000".to_string())
                         .parse::<i64>()
                         .unwrap_or(10000)
-                    == 0
-                {
-                    trace!("Pushed mmr {} into database", ptr);
-                }
+                        == 0
+                    {
+                        trace!("Pushed mmr {} into database", ptr);
+                    }
 
-                ptr += 1;
+                    mmr_size = mmr_size_new;
+                    ptr += 1;
+                }
             }
+            debug!("total: {}", now() - a);
         }
     }
 
@@ -75,29 +90,44 @@ impl Runner {
     }
 
     /// Push new header hash into storage
-    pub async fn push(&mut self, number: i64) -> Result<(), Error> {
-        let mmr_size = if number == 0 {
-            0
-        } else {
-            cmmr::leaf_index_to_mmr_size((number - 1) as u64)
-        } as u64;
+    pub async fn push(&mut self, number: i64, mmr_size: u64) -> Result<u64, Error> {
+        let a = now();
         let mut mmr = MMR::<_, MergeHash, _>::new(mmr_size, &self.store);
-        mmr.push(H256::from(
-            &EthHeaderRPCResp::get(&self.client, number as u64)
-                .await?
-                .result
-                .hash,
-        ))?;
+
+        let b = now();
+        debug!("mmr create  : {}", b - a);
+
+        let hash_from_ethereum = &EthHeaderRPCResp::get(&self.client, number as u64)
+            .await?
+            .result
+            .hash;
+
+        let c = now();
+        debug!("rpc call    : {}", c - b);
+
+        mmr.push(H256::from(hash_from_ethereum))?;
+
+        let d = now();
+        debug!("push to mmr : {}", d - c);
+
+        let mmr_size_new = mmr.mmr_size();
+
+        let e = now();
+        debug!("get new size: {}", e - d);
 
         mmr.commit()?;
-        Ok(())
+
+        let f = now();
+        debug!("commit      : {}", f - e);
+
+        Ok(mmr_size_new)
     }
 
     /// Gen mmrs for tests
     pub async fn stops_at(&mut self, count: i64) -> Result<(), Error> {
-        let mmr_size = self.db.iterator(IteratorMode::Start).count() as i64;
+        let mut mmr_size = self.db.iterator(IteratorMode::Start).count() as u64;
         let mut ptr = {
-            let last_leaf = helper::mmr_size_to_last_leaf(mmr_size);
+            let last_leaf = helper::mmr_size_to_last_leaf(mmr_size as i64);
             if last_leaf == 0 {
                 0
             } else {
@@ -109,8 +139,10 @@ impl Runner {
             if ptr >= count {
                 break;
             }
-            self.push(ptr).await?;
-            ptr += 1;
+            if let Ok(mmr_size_new) = self.push(ptr, mmr_size).await {
+                mmr_size = mmr_size_new;
+                ptr += 1;
+            }
         }
 
         Ok(())