[Resolver] Avoid allocations in #spec_is_platform_compatible

lib/cocoapods/resolver.rb

@@ -535,11 +535,15 @@ module Pod
       vertex = dependency_graph.vertex_named(dependency.name)
       predecessors = vertex.recursive_predecessors.select(&:root)
       predecessors << vertex if vertex.root?
-      platforms_to_satisfy = predecessors.flat_map(&:explicit_requirements).flat_map { |r| @platforms_by_dependency[r] }
+      platforms_to_satisfy = predecessors.lazy.flat_map(&:explicit_requirements).flat_map { |r| @platforms_by_dependency[r] }
+
+      available_platforms = spec.available_platforms
 
       platforms_to_satisfy.all? do |platform_to_satisfy|
-        spec.available_platforms.select { |spec_platform| spec_platform.name == platform_to_satisfy.name }.
-          all? { |spec_platform| platform_to_satisfy.supports?(spec_platform) }
+        available_platforms.all? do |spec_platform|
+          next true unless spec_platform.name == platform_to_satisfy.name
+          platform_to_satisfy.supports?(spec_platform)
+        end
       end
     end