diff --git a/fastlib/u/dongryel/range_search/main.cc b/fastlib/u/dongryel/range_search/main.cc
index 968f3a27ab..3fe1e90c7f 100644
--- a/fastlib/u/dongryel/range_search/main.cc
+++ b/fastlib/u/dongryel/range_search/main.cc
@@ -32,6 +32,12 @@ int main(int argc, char *argv[]) {
       printf("Both methods have different results...\n");
     }
   }
+  timer *tree_range_search_time = fx_timer(NULL, "tree_range_search");
+  timer *naive_search_time = fx_timer(NULL, "naive_search");
+	 
+  fx_format_result(NULL, "speedup", "%g", 
+		   ((double)(naive_search_time->total).micros) / 
+		   ((double)(tree_range_search_time->total).micros));
   fx_done();
   return 0;
 }
diff --git a/fastlib/u/dongryel/range_search/range_reader.h b/fastlib/u/dongryel/range_search/range_reader.h
index ed7c0172f9..7b6994aa54 100644
--- a/fastlib/u/dongryel/range_search/range_reader.h
+++ b/fastlib/u/dongryel/range_search/range_reader.h
@@ -12,8 +12,8 @@ class RangeReader {
 
     TextTokenizer tokenizer;
     const char *dname = fx_param_str(NULL, "range", "range.txt");
-    const double offset1 = fx_param_double(NULL, "offset1", 0);
-    const double offset2 = fx_param_double(NULL, "offset2", 0);
+    const double factor = fx_param_double(NULL, "factor", 1);
+    const double offset = fx_param_double(NULL, "offset", 0);
     tokenizer.Open(dname);
     
     for(index_t i = 0; i < range.size(); i++) {
@@ -51,8 +51,9 @@ class RangeReader {
       }
       
       // apply offset
-      range[i].lo -= offset1;
-      range[i].hi -= offset2;
+      range[i].lo -= offset;
+      range[i].hi -= offset;
+      range[i].hi = range[i].lo + (range[i].hi - range[i].lo) * factor;
 
       printf("Got [ %g %g ]\n", range[i].lo, range[i].hi);