diff --git a/iguana/iguana777.h b/iguana/iguana777.h
index c3b1654f3..29522a663 100755
--- a/iguana/iguana777.h
+++ b/iguana/iguana777.h
@@ -389,7 +389,7 @@ struct iguana_ramchain
     void *fileptr,*sigsfileptr,*Xspendptr,*debitsfileptr,*lastspendsfileptr;
     char from_ro,from_roX,from_roA,from_roU;
     struct iguana_account *A,*creditsA; struct iguana_spendvector *Xspendinds;
-    struct iguana_utxo *Uextras; uint8_t *txbits;
+    struct iguana_utxo *Uextras; uint8_t *txbits; struct iguana_txid *cacheT;
     //int16_t permutation[IGUANA_MAXBUNDLES];
 //struct iguana_Uextra *U2,*roU2; struct iguana_pkextra *P2,*roP2;
 };
diff --git a/iguana/iguana_ramchain.c b/iguana/iguana_ramchain.c
index cbba8236a..b8eba298b 100755
--- a/iguana/iguana_ramchain.c
+++ b/iguana/iguana_ramchain.c
@@ -678,6 +678,7 @@ int32_t iguana_ramchain_prefetch(struct iguana_info *coin,struct iguana_ramchain
 {
     RAMCHAIN_DECLARE; RAMCHAIN_ZEROES;
     struct iguana_pkhash p; struct iguana_unspent u; struct iguana_txid txid; uint32_t i,numpkinds,numtxids,numunspents,numexternal,tlen,plen,nonz=0; uint8_t *ptr;
+return(0);
     if ( ramchain->H.data != 0 )
     {
         if ( flag == 0 )
@@ -1238,6 +1239,16 @@ int32_t iguana_ramchain_free(struct iguana_info *coin,struct iguana_ramchain *ra
                     myfree(item,sizeof(*item));
             }
         }
+        if ( ramchain->txbits != 0 )
+        {
+            free(ramchain->txbits);
+            ramchain->txbits = 0;
+        }
+        if ( ramchain->cacheT != 0 )
+        {
+            free(ramchain->cacheT);
+            ramchain->cacheT = 0;
+        }
     }
     ramchain->txids = 0;
     ramchain->pkhashes = 0;
diff --git a/iguana/iguana_unspents.c b/iguana/iguana_unspents.c
index 8b359e7f6..566243a95 100755
--- a/iguana/iguana_unspents.c
+++ b/iguana/iguana_unspents.c
@@ -131,6 +131,23 @@ int32_t iguana_alloctxbits(struct iguana_info *coin,struct iguana_ramchain *ramc
     return(-1);
 }
 
+
+int32_t iguana_alloccacheT(struct iguana_info *coin,struct iguana_ramchain *ramchain)
+{
+    static int64_t total;
+    if ( ramchain->cacheT == 0 )
+    {
+        int32_t tlen; struct iguana_txid *T = (void *)((long)ramchain->H.data + ramchain->H.data->Toffset);
+        tlen = sizeof(*T) * ramchain->H.data->numtxids;
+        ramchain->cacheT = calloc(1,tlen);
+        memcpy(ramchain->cacheT,T,tlen);
+        total += tlen;
+        //char str[65]; printf("alloc.[%d] txbits.%p[%d] total %s\n",ramchain->H.data->height/coin->chain->bundlesize,ramchain->cacheT,tlen,mbstr(str,total));
+        return(tlen);
+    }
+    return(-1);
+}
+
 void iguana_volatilesalloc(struct iguana_info *coin,struct iguana_ramchain *ramchain)
 {
     if ( ramchain != 0 && ramchain->H.data != 0 )
@@ -561,7 +578,13 @@ struct iguana_txid *iguana_txidfind(struct iguana_info *coin,int32_t *heightp,st
                         TXbits = (void *)(long)((long)ramchain->H.data + ramchain->H.data->TXoffset);
                     }
                 }
-                T = (void *)(long)((long)ramchain->H.data + ramchain->H.data->Toffset);
+                if ( (T= ramchain->cacheT) == 0 )
+                {
+                    if ( coin->PREFETCHLAG >= 0 )
+                        iguana_alloccacheT(coin,ramchain);
+                    if ( (T= ramchain->cacheT) == 0 )
+                        T = (void *)(long)((long)ramchain->H.data + ramchain->H.data->Toffset);
+                }
                 if ( (txidind= iguana_sparseaddtx(TXbits,ramchain->H.data->txsparsebits,ramchain->H.data->numtxsparse,txid,T,0,ramchain)) > 0 )
                 {
                     //printf("found txidind.%d\n",txidind);
@@ -2030,7 +2053,7 @@ int32_t iguana_bundlevalidate(struct iguana_info *coin,struct iguana_bundle *bp,
                 fclose(fp);
             }
         }
-    } else printf("skip validate.[%d] validated.%u force.%d\n",bp->hdrsi,bp->validated,forceflag);
+    } // else printf("skip validate.[%d] validated.%u force.%d\n",bp->hdrsi,bp->validated,forceflag);
     if ( errs != 0 )
     {
         printf("remove.[%d]\n",bp->hdrsi);