--- a/tests/test-sparse-revlog.t	Sun Feb 24 19:56:57 2019 +0100
+++ b/tests/test-sparse-revlog.t	Sun Feb 24 19:56:51 2019 +0100
@@ -28,6 +28,8 @@
   > maxchainlen = 15
   > [storage]
   > revlog.optimize-delta-parent-choice = yes
+  > [format]
+  > generaldelta = yes
   > EOF
   $ hg init sparse-repo
   $ cd sparse-repo
@@ -78,7 +80,7 @@
   
 
   $ f -s .hg/store/data/*.d
-  .hg/store/data/_s_p_a_r_s_e-_r_e_v_l_o_g-_t_e_s_t-_f_i_l_e.d: size=65281524
+  .hg/store/data/_s_p_a_r_s_e-_r_e_v_l_o_g-_t_e_s_t-_f_i_l_e.d: size=63327412
   $ hg debugrevlog *
   format : 1
   flags  : generaldelta
@@ -90,45 +92,45 @@
       empty     :        0 ( 0.00%)
                      text  :        0 (100.00%)
                      delta :        0 (100.00%)
-      snapshot  :      372 ( 7.44%)
-        lvl-0   :              4 ( 0.08%)
-        lvl-1   :             25 ( 0.50%)
-        lvl-2   :             74 ( 1.48%)
-        lvl-3   :            117 ( 2.34%)
-        lvl-4   :            152 ( 3.04%)
-      deltas    :     4629 (92.56%)
-  revision size : 65281524
-      snapshot  :  9910992 (15.18%)
-        lvl-0   :         804162 ( 1.23%)
-        lvl-1   :        1816378 ( 2.78%)
-        lvl-2   :        2355855 ( 3.61%)
-        lvl-3   :        2557680 ( 3.92%)
-        lvl-4   :        2376917 ( 3.64%)
-      deltas    : 55370532 (84.82%)
+      snapshot  :      383 ( 7.66%)
+        lvl-0   :              3 ( 0.06%)
+        lvl-1   :             20 ( 0.40%)
+        lvl-2   :             68 ( 1.36%)
+        lvl-3   :            112 ( 2.24%)
+        lvl-4   :            180 ( 3.60%)
+      deltas    :     4618 (92.34%)
+  revision size : 63327412
+      snapshot  :  9886710 (15.61%)
+        lvl-0   :         603104 ( 0.95%)
+        lvl-1   :        1559991 ( 2.46%)
+        lvl-2   :        2295592 ( 3.62%)
+        lvl-3   :        2531199 ( 4.00%)
+        lvl-4   :        2896824 ( 4.57%)
+      deltas    : 53440702 (84.39%)
   
   chunks        :     5001
       0x78 (x)  :     5001 (100.00%)
-  chunks size   : 65281524
-      0x78 (x)  : 65281524 (100.00%)
+  chunks size   : 63327412
+      0x78 (x)  : 63327412 (100.00%)
   
   avg chain length  :        9
   max chain length  :       15
-  max chain reach   : 27873839
-  compression ratio :       26
+  max chain reach   : 28248745
+  compression ratio :       27
   
   uncompressed data size (min/max/avg) : 346468 / 346472 / 346471
-  full revision size (min/max/avg)     : 200973 / 201094 / 201040
-  inter-snapshot size (min/max/avg)    : 11586 / 170448 / 24746
-      level-1   (min/max/avg)          : 14021 / 170448 / 72655
-      level-2   (min/max/avg)          : 11616 / 81152 / 31835
-      level-3   (min/max/avg)          : 11607 / 42813 / 21860
-      level-4   (min/max/avg)          : 11586 / 21590 / 15637
-  delta size (min/max/avg)             : 10649 / 166014 / 11961
+  full revision size (min/max/avg)     : 201008 / 201050 / 201034
+  inter-snapshot size (min/max/avg)    : 11596 / 168150 / 24430
+      level-1   (min/max/avg)          : 16653 / 168150 / 77999
+      level-2   (min/max/avg)          : 12951 / 85595 / 33758
+      level-3   (min/max/avg)          : 11608 / 43029 / 22599
+      level-4   (min/max/avg)          : 11596 / 21632 / 16093
+  delta size (min/max/avg)             : 10649 / 107163 / 11572
   
-  deltas against prev  : 3839 (82.93%)
-      where prev = p1  : 3839     (100.00%)
+  deltas against prev  : 3910 (84.67%)
+      where prev = p1  : 3910     (100.00%)
       where prev = p2  :    0     ( 0.00%)
       other            :    0     ( 0.00%)
-  deltas against p1    :  634 (13.70%)
-  deltas against p2    :   62 ( 1.34%)
-  deltas against other :   94 ( 2.03%)
+  deltas against p1    :  648 (14.03%)
+  deltas against p2    :   60 ( 1.30%)
+  deltas against other :    0 ( 0.00%)