Reduce the maximum resolver rounds by an order of magnitude

This reduces how much pip will attempt to backtrack.
pypa · Mar 28, 2023 · f613141 · f613141
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commit f613141
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diff --git a/news/11908.feature.rst b/news/11908.feature.rst
@@ -0,0 +1 @@
+Reduce the number of resolver rounds, since backjumping makes the resolver more efficient in finding solutions. This also makes pathological cases fail quicker.
diff --git a/src/pip/_internal/resolution/resolvelib/resolver.py b/src/pip/_internal/resolution/resolvelib/resolver.py
@@ -88,7 +88,7 @@ def resolve(
         )
 
         try:
-            try_to_avoid_resolution_too_deep = 2000000
+            try_to_avoid_resolution_too_deep = 200000
             result = self._result = resolver.resolve(
                 collected.requirements, max_rounds=try_to_avoid_resolution_too_deep
             )