Reduce the maximum resolver rounds by an order of magnitude

pradyunsg · pradyunsg · commit f613141fb391 · 2023-03-28T23:34:28.000+01:00
This reduces how much pip will attempt to backtrack.
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
             )

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	`+Reduce the number of resolver rounds, since backjumping makes the resolver more efficient in finding solutions. This also makes pathological cases fail quicker.`
Original file line number	Diff line number	Diff line change
`@@ -88,7 +88,7 @@ def resolve(`
`88`	`88`	`)`
`89`	`89`
`90`	`90`	`try:`
`91`		`- try_to_avoid_resolution_too_deep = 2000000`
	`91`	`+ try_to_avoid_resolution_too_deep = 200000`
`92`	`92`	`result = self._result = resolver.resolve(`
`93`	`93`	`collected.requirements, max_rounds=try_to_avoid_resolution_too_deep`
`94`	`94`	`)`