Improve dependency resolution speed

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Changed
 ### Changed
 
 
 - Improved dependency resolution to avoid unnecessary operations.
 - Improved dependency resolution to avoid unnecessary operations.
+- Improved dependency resolution speed.
 
 
 
 
 ## [0.6.5] - 2018-03-22
 ## [0.6.5] - 2018-03-22

poetry/console/commands/debug/resolve.py

@@ -43,6 +43,7 @@ class DebugResolveCommand(Command):
             self.poetry.package,
             self.poetry.package,
             self.poetry.pool,
             self.poetry.pool,
             Repository(),
             Repository(),
+            Repository(),
             self.output
             self.output
         )
         )
 
 

poetry/mixology/resolution.py

@@ -16,7 +16,6 @@ from .dependency_graph import DependencyGraph
 from .helpers import flat_map
 from .helpers import flat_map
 from .possibility_set import PossibilitySet
 from .possibility_set import PossibilitySet
 from .state import DependencyState
 from .state import DependencyState
-from .state import ResolutionState
 from .unwind_details import UnwindDetails
 from .unwind_details import UnwindDetails
 from .utils import unique
 from .utils import unique
 
 

poetry/puzzle/provider.py

@@ -33,6 +33,8 @@ class Provider(SpecificationProvider):
         self._package = package
         self._package = package
         self._pool = pool
         self._pool = pool
         self._python_constraint = package.python_constraint
         self._python_constraint = package.python_constraint
+        self._base_dg = DependencyGraph()
+        self._search_for = {}
 
 
     @property
     @property
     def pool(self) -> Pool:
     def pool(self) -> Pool:
@@ -59,6 +61,9 @@ class Provider(SpecificationProvider):
         The specifications in the returned list will be considered in reverse
         The specifications in the returned list will be considered in reverse
         order, so the latest version ought to be last.
         order, so the latest version ought to be last.
         """
         """
+        if dependency in self._search_for:
+            return self._search_for[dependency]
+
         if dependency.is_vcs():
         if dependency.is_vcs():
             return self.search_for_vcs(dependency)
             return self.search_for_vcs(dependency)
 
 
@@ -76,7 +81,9 @@ class Provider(SpecificationProvider):
             )
             )
         )
         )
 
 
-        return packages
+        self._search_for[dependency] = packages
+
+        return self._search_for[dependency]
 
 
     def search_for_vcs(self, dependency: VCSDependency) -> List[Package]:
     def search_for_vcs(self, dependency: VCSDependency) -> List[Package]:
         """
         """
@@ -190,6 +197,7 @@ class Provider(SpecificationProvider):
                           conflicts: Dict[str, List[Conflict]]):
                           conflicts: Dict[str, List[Conflict]]):
         return sorted(dependencies, key=lambda d: [
         return sorted(dependencies, key=lambda d: [
             0 if activated.vertex_named(d.name).payload else 1,
             0 if activated.vertex_named(d.name).payload else 1,
+            0 if activated.vertex_named(d.name).root else 1,
             0 if d.allows_prereleases() else 1,
             0 if d.allows_prereleases() else 1,
             0 if d.name in conflicts else 1,
             0 if d.name in conflicts else 1,
             0 if activated.vertex_named(d.name).payload else len(self.search_for(d))
             0 if activated.vertex_named(d.name).payload else len(self.search_for(d))

poetry/puzzle/ui.py

 from cleo.styles import CleoStyle
 from cleo.styles import CleoStyle
-from cleo.helpers import ProgressIndicator
 from poetry.mixology.contracts import UI as BaseUI
 from poetry.mixology.contracts import UI as BaseUI