From 61c4573237c3e8f63ce430ca417b8a7b036c30e8 Mon Sep 17 00:00:00 2001
From: zxkjack123 <zxkjack123@163.com>
Date: Wed, 10 Apr 2019 11:13:59 -0500
Subject: [PATCH 1/3] simplify the method to get dc

---
 pyne/alara.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pyne/alara.py b/pyne/alara.py
index 07baee378f..22254b17cf 100644
--- a/pyne/alara.py
+++ b/pyne/alara.py
@@ -233,8 +233,12 @@ def photon_source_hdf5_to_mesh(mesh, filename, tags, sub_voxel=False,
     # creat a list of decay times (strings) in the source file
     phtn_src_dc = []
     with tb.open_file(filename) as h5f:
+#        import pdb; pdb.set_trace()
         for row in h5f.root.data:
-            phtn_src_dc.append(row[2])
+            if row[2] not in phtn_src_dc:
+                phtn_src_dc.append(row[2])
+            else:
+                break
     phtn_src_dc = list(set(phtn_src_dc))
 
     # iterate through each requested nuclide/dectay time

From df36e5d9fed7dad0514bbaa7593ed4fb5f14e9da Mon Sep 17 00:00:00 2001
From: zxkjack123 <zxkjack123@163.com>
Date: Wed, 10 Apr 2019 11:22:12 -0500
Subject: [PATCH 2/3] clean up

---
 pyne/alara.py | 2 --
 1 file changed, 2 deletions(-)

diff --git a/pyne/alara.py b/pyne/alara.py
index 22254b17cf..5b1677a7bd 100644
--- a/pyne/alara.py
+++ b/pyne/alara.py
@@ -233,13 +233,11 @@ def photon_source_hdf5_to_mesh(mesh, filename, tags, sub_voxel=False,
     # creat a list of decay times (strings) in the source file
     phtn_src_dc = []
     with tb.open_file(filename) as h5f:
-#        import pdb; pdb.set_trace()
         for row in h5f.root.data:
             if row[2] not in phtn_src_dc:
                 phtn_src_dc.append(row[2])
             else:
                 break
-    phtn_src_dc = list(set(phtn_src_dc))
 
     # iterate through each requested nuclide/dectay time
     for cond in tags.keys():

From 32cdb3a1e37fb268f4e4a50e7840aebd428de11b Mon Sep 17 00:00:00 2001
From: zxkjack123 <zxkjack123@163.com>
Date: Wed, 10 Apr 2019 11:54:05 -0500
Subject: [PATCH 3/3] add news file

---
 news/speed_up_r2s_step2_1.rst | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 news/speed_up_r2s_step2_1.rst

diff --git a/news/speed_up_r2s_step2_1.rst b/news/speed_up_r2s_step2_1.rst
new file mode 100644
index 0000000000..832c95580c
--- /dev/null
+++ b/news/speed_up_r2s_step2_1.rst
@@ -0,0 +1,13 @@
+**Added:** None
+
+**Changed:**
+
+* Simplify the method to get the list of decay/cooling times
+
+**Deprecated:** None
+
+**Removed:** None
+
+**Fixed:** None
+
+**Security:** None