--- a/hgext3rd/evolve/obsdiscovery.py	Thu Dec 21 04:29:02 2017 +0100
+++ b/hgext3rd/evolve/obsdiscovery.py	Thu Dec 21 06:18:50 2017 +0100
@@ -436,8 +436,9 @@
                         affected.add(r)
 
         if affected:
-            repo.ui.log('evoext-cache', 'obshashcache reset - '
-                        'new markers affect cached ranges\n')
+            repo.ui.log('evoext-cache', 'obshashcache clean - '
+                        'new markers affect %d changeset and cached ranges\n'
+                        % len(affected))
             # XXX the current reset is too strong we could just drop the affected range
             con = self._con
             if con is not None:
@@ -460,9 +461,17 @@
             revs = newrevs
 
         repo.depthcache.update(repo)
+        total = len(revs)
+
+        def progress(pos, rev):
+            repo.ui.progress('updating obshashrange cache',
+                             pos, 'rev %s' % rev, unit='revision', total=total)
         # warm the cache for the new revs
-        for r in revs:
+        progress(0, '')
+        for idx, r in enumerate(revs):
             _obshashrange(repo, (r, 0))
+            progress(idx, r)
+        progress(None, '')
 
         del self._updating
 

--- a/tests/test-discovery-obshashrange.t	Thu Dec 21 04:29:02 2017 +0100
+++ b/tests/test-discovery-obshashrange.t	Thu Dec 21 06:18:50 2017 +0100
@@ -86,7 +86,7 @@
   * @0000000000000000000000000000000000000000 (*)> log -G exited 0 after *.?? seconds (glob)
   * @0000000000000000000000000000000000000000 (*)> debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 66f7d451a68b85ed82ff5fcc254daf50c74144bd (glob)
   * @0000000000000000000000000000000000000000 (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @0000000000000000000000000000000000000000 (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @0000000000000000000000000000000000000000 (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 66f7d451a68b85ed82ff5fcc254daf50c74144bd exited 0 after *.?? seconds (glob)
@@ -96,7 +96,7 @@
   * @0000000000000000000000000000000000000000 (*)> debugobsolete bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb 01241442b3c2bf3211e593b549c655ea65b295e3 --config 'experimental.obshashrange.max-revs=1' exited 0 after *.?? seconds (glob)
   * @0000000000000000000000000000000000000000 (*)> debugobsolete cccccccccccccccccccccccccccccccccccccccc bebd167eb94d257ace0e814aeb98e6972ed2970d (glob)
   * @0000000000000000000000000000000000000000 (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @0000000000000000000000000000000000000000 (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @0000000000000000000000000000000000000000 (*)> obshashcache clean - new markers affect 2 changeset and cached ranges (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 2o) (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> debugobsolete cccccccccccccccccccccccccccccccccccccccc bebd167eb94d257ace0e814aeb98e6972ed2970d exited 0 after *.?? seconds (glob)
@@ -106,7 +106,7 @@
   * @0000000000000000000000000000000000000000 (*)> debugobsolete dddddddddddddddddddddddddddddddddddddddd c8d03c1b5e94af74b772900c58259d2e08917735 --config 'experimental.obshashrange.warm-cache=0' exited 0 after *.?? seconds (glob)
   * @0000000000000000000000000000000000000000 (*)> debugobsolete eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 4de32a90b66cd083ebf3c00b41277aa7abca51dd (glob)
   * @0000000000000000000000000000000000000000 (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @0000000000000000000000000000000000000000 (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @0000000000000000000000000000000000000000 (*)> obshashcache clean - new markers affect 2 changeset and cached ranges (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 2o) (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> debugobsolete eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee 4de32a90b66cd083ebf3c00b41277aa7abca51dd exited 0 after *.?? seconds (glob)
@@ -293,7 +293,7 @@
   [1]
   $ hg -R ../server blackbox
   * @0000000000000000000000000000000000000000 (*)> -R server serve --stdio (glob)
-  * @0000000000000000000000000000000000000000 (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @0000000000000000000000000000000000000000 (*)> obshashcache clean - new markers affect 2 changeset and cached ranges (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 2o) (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obscache in *.???? seconds (0r, 2o) (glob)
   * @0000000000000000000000000000000000000000 (*)> -R server serve --stdio exited 0 after *.?? seconds (glob)
@@ -327,7 +327,7 @@
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> commit -m foo exited 0 after *.?? seconds (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobsolete ffffffffffffffffffffffffffffffffffffffff 45f8b879de922f6a6e620ba04205730335b6fc7e (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobsolete ffffffffffffffffffffffffffffffffffffffff 45f8b879de922f6a6e620ba04205730335b6fc7e exited 0 after *.?? seconds (glob)
@@ -340,13 +340,13 @@
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> log -G exited 0 after *.?? seconds (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobsolete 111111111111111aaaaaaaaa1111111111111111 66f7d451a68b85ed82ff5fcc254daf50c74144bd (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobsolete 111111111111111aaaaaaaaa1111111111111111 66f7d451a68b85ed82ff5fcc254daf50c74144bd exited 0 after *.?? seconds (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobsolete 22222222222222222bbbbbbbbbbbbb2222222222 2dc09a01254db841290af0538aa52f6f52c776e3 (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobsolete 22222222222222222bbbbbbbbbbbbb2222222222 2dc09a01254db841290af0538aa52f6f52c776e3 exited 0 after *.?? seconds (glob)
@@ -401,13 +401,13 @@
   * @0000000000000000000000000000000000000000 (*)> -R ../server/ debugobsolete --rev '::tip' exited 0 after *.?? seconds (glob)
   * @0000000000000000000000000000000000000000 (*)> -R ../server debugobsolete aaaaaaa11111111aaaaaaaaa1111111111111111 66f7d451a68b85ed82ff5fcc254daf50c74144bd (glob)
   * @0000000000000000000000000000000000000000 (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @0000000000000000000000000000000000000000 (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @0000000000000000000000000000000000000000 (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> -R ../server debugobsolete aaaaaaa11111111aaaaaaaaa1111111111111111 66f7d451a68b85ed82ff5fcc254daf50c74144bd exited 0 after *.?? seconds (glob)
   * @0000000000000000000000000000000000000000 (*)> -R ../server debugobsolete bbbbbbb2222222222bbbbbbbbbbbbb2222222222 bebd167eb94d257ace0e814aeb98e6972ed2970d (glob)
   * @0000000000000000000000000000000000000000 (*)> alias 'debugobsolete' expands to 'debugobsolete -d '0 0'' (glob)
-  * @0000000000000000000000000000000000000000 (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @0000000000000000000000000000000000000000 (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @0000000000000000000000000000000000000000 (*)> -R ../server debugobsolete bbbbbbb2222222222bbbbbbbbbbbbb2222222222 bebd167eb94d257ace0e814aeb98e6972ed2970d exited 0 after *.?? seconds (glob)
@@ -432,7 +432,7 @@
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> log -G exited 0 after *.?? seconds (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> pull -r 6 (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obsdiscovery, 2/6 mismatch - 1 obshashrange queries in *.???? seconds (glob)
-  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache clean - new markers affect 2 changeset and cached ranges (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-depthcache in *.???? seconds (2r) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obshashrange in *.???? seconds (2r, 3o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-stablerange-mergepoint in *.???? seconds (2r) (glob)
@@ -514,7 +514,7 @@
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> debugobshashrange --subranges --rev 'heads(all())' exited 0 after *.?? seconds (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> pull -r f69452c5b1af6cbaaa56ef50cf94fff5bcc6ca23 (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obsdiscovery, 2/7 mismatch - 1 obshashrange queries in *.???? seconds (glob)
-  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache clean - new markers affect 2 changeset and cached ranges (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 2o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obscache in *.???? seconds (0r, 2o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> pull -r f69452c5b1af6cbaaa56ef50cf94fff5bcc6ca23 exited 0 after *.?? seconds (glob)
@@ -536,7 +536,7 @@
   $ hg blackbox
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> pull -r bebd167eb94d257ace0e814aeb98e6972ed2970d (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obsdiscovery, 1/5 mismatch - 1 obshashrange queries in *.???? seconds (glob)
-  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obshashrange in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> updated evo-ext-obscache in *.???? seconds (0r, 1o) (glob)
   * @45f8b879de922f6a6e620ba04205730335b6fc7e (*)> pull -r bebd167eb94d257ace0e814aeb98e6972ed2970d exited 0 after *.?? seconds (glob)
@@ -784,7 +784,7 @@
   * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> log -G exited 0 after *.?? seconds (glob)
   * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> pull (glob)
   * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> obsdiscovery, 1/8 mismatch - 1 obshashrange queries in *.???? seconds (glob)
-  * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> obshashcache reset - new markers affect cached ranges (glob)
+  * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> obshashcache clean - new markers affect 1 changeset and cached ranges (glob)
   * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> updated evo-ext-depthcache in *.???? seconds (1r) (glob)
   * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> updated evo-ext-obshashrange in *.???? seconds (1r, 2o) (glob)
   * @bebd167eb94d257ace0e814aeb98e6972ed2970d (*)> updated evo-ext-stablerange-mergepoint in *.???? seconds (1r) (glob)