From 854651d00faec0fcdd2cc68194c3716da55b6a1e Mon Sep 17 00:00:00 2001
From: oxarbitrage <oxarbitrage@gmail.com>
Date: Mon, 17 Jul 2017 12:19:07 -0700
Subject: [PATCH 1/2] for issue 328

---
 libraries/app/database_api.cpp | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index 65499e861c..d7dfd7c04a 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -1031,9 +1031,15 @@ vector<call_order_object> database_api_impl::get_call_orders(asset_id_type a, ui
    const auto& call_index = _db.get_index_type<call_order_index>().indices().get<by_price>();
    const asset_object& mia = _db.get(a);
    price index_price = price::min(mia.bitasset_data(_db).options.short_backing_asset, mia.get_id());
-
-   return vector<call_order_object>(call_index.lower_bound(index_price.min()),
-                                    call_index.lower_bound(index_price.max()));
+   
+   vector< call_order_object> result;
+   auto itr_min = call_index.lower_bound(index_price.min());
+   while( itr_min != call_index.lower_bound(index_price.max()) && result.size() < limit ) 
+   {
+      result.emplace_back(*itr_min);
+      ++itr_min;
+   }
+   return result;
 }
 
 vector<force_settlement_object> database_api::get_settle_orders(asset_id_type a, uint32_t limit)const
@@ -1045,8 +1051,15 @@ vector<force_settlement_object> database_api_impl::get_settle_orders(asset_id_ty
 {
    const auto& settle_index = _db.get_index_type<force_settlement_index>().indices().get<by_expiration>();
    const asset_object& mia = _db.get(a);
-   return vector<force_settlement_object>(settle_index.lower_bound(mia.get_id()),
-                                          settle_index.upper_bound(mia.get_id()));
+
+   vector<force_settlement_object> result;
+   auto itr_min = settle_index.lower_bound(mia.get_id());
+   while( itr_min != settle_index.upper_bound(mia.get_id()) && result.size() < limit )
+   {
+      result.emplace_back(*itr_min);
+      ++itr_min;
+   }
+   return result;
 }
 
 vector<call_order_object> database_api::get_margin_positions( const account_id_type& id )const

From 50e535ecbd147406cb67109e90dc511a99ce9628 Mon Sep 17 00:00:00 2001
From: oxarbitrage <oxarbitrage@gmail.com>
Date: Mon, 17 Jul 2017 15:33:08 -0700
Subject: [PATCH 2/2] improve performance

---
 libraries/app/database_api.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/libraries/app/database_api.cpp b/libraries/app/database_api.cpp
index d7dfd7c04a..94956efd0f 100644
--- a/libraries/app/database_api.cpp
+++ b/libraries/app/database_api.cpp
@@ -1034,7 +1034,8 @@ vector<call_order_object> database_api_impl::get_call_orders(asset_id_type a, ui
    
    vector< call_order_object> result;
    auto itr_min = call_index.lower_bound(index_price.min());
-   while( itr_min != call_index.lower_bound(index_price.max()) && result.size() < limit ) 
+   auto itr_max = call_index.lower_bound(index_price.max());
+   while( itr_min != itr_max && result.size() < limit ) 
    {
       result.emplace_back(*itr_min);
       ++itr_min;
@@ -1054,7 +1055,8 @@ vector<force_settlement_object> database_api_impl::get_settle_orders(asset_id_ty
 
    vector<force_settlement_object> result;
    auto itr_min = settle_index.lower_bound(mia.get_id());
-   while( itr_min != settle_index.upper_bound(mia.get_id()) && result.size() < limit )
+   auto itr_max = settle_index.upper_bound(mia.get_id());
+   while( itr_min != itr_max && result.size() < limit )
    {
       result.emplace_back(*itr_min);
       ++itr_min;