Reduce resolver rounds by an order of magnitude (#11908)

pradyunsg · web-flow · commit 10d9cbc601e5 · 2023-03-29T21:03:36.000+01:00
Co-authored-by: Pradyun Gedam &lt;pradyunsg@users.noreply.github.com&gt;
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
@@ -88,9 +88,9 @@ def resolve(
         )
 
         try:
-            try_to_avoid_resolution_too_deep = 2000000
+            limit_how_complex_resolution_can_be = 200000
             result = self._result = resolver.resolve(
-                collected.requirements, max_rounds=try_to_avoid_resolution_too_deep
+                collected.requirements, max_rounds=limit_how_complex_resolution_can_be
             )
 
         except ResolutionImpossible as e:

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
`@@ -88,9 +88,9 @@ def resolve(`
`88`	`88`	`)`
`89`	`89`
`90`	`90`	`try:`
`91`		`- try_to_avoid_resolution_too_deep = 2000000`
	`91`	`+ limit_how_complex_resolution_can_be = 200000`
`92`	`92`	`result = self._result = resolver.resolve(`
`93`		`- collected.requirements, max_rounds=try_to_avoid_resolution_too_deep`
	`93`	`+ collected.requirements, max_rounds=limit_how_complex_resolution_can_be`
`94`	`94`	`)`
`95`	`95`
`96`	`96`	`except ResolutionImpossible as e:`