diff --git a/plugins/commands/serve/mappers.rb b/plugins/commands/serve/mappers.rb
index 4d93d98d9..32e25119e 100644
--- a/plugins/commands/serve/mappers.rb
+++ b/plugins/commands/serve/mappers.rb
@@ -152,7 +152,7 @@ module VagrantPlugins
           end
           if a.is_a?(Google::Protobuf::Any)
             non_any = unany(a)
-            logger.debug("extracted any proto message #{a.class} -> #{non_any}")
+            logger.debug { "extracted any proto message #{a.class} -> #{non_any}" }
             a = non_any
           end
           if name
@@ -184,7 +184,7 @@ module VagrantPlugins
         # If the value given is the desired type, just return the value
         return value if value != GENERATE && !to.nil? && value.is_a?(to)
 
-        logger.debug("starting value mapping process #{value.class} -> #{to.nil? ? 'unknown' : to.inspect}")
+        logger.debug { "starting value mapping process #{value.class} -> #{to.nil? ? 'unknown' : to.inspect}" }
         if value.nil? && to
           val = (extra_args + known_arguments).detect do |item|
             item.is_a?(to)
@@ -202,7 +202,7 @@ module VagrantPlugins
 
         # If the provided value is a protobuf value, just return that value
         if value.is_a?(Google::Protobuf::Value)
-          logger.debug("direct return of protobuf value contents - #{value.to_ruby}")
+          logger.debug { "direct return of protobuf value contents - #{value.to_ruby}" }
           return value.to_ruby
         end
 
@@ -218,7 +218,7 @@ module VagrantPlugins
               m.output.ancestors.include?(Google::Protobuf::MessageExts)
             next m if !m.inputs.first.valid?(SDK::FuncSpec::Value) ||
               m.inputs.first.valid?(value)
-            logger.trace("removing mapper - invalid funcspec match - #{m}")
+            logger.trace { "removing mapper - invalid funcspec match - #{m}" }
             nil
           end.compact
           map_mapper.mappers.replace(valid_mappers)
@@ -329,7 +329,7 @@ module VagrantPlugins
         # Now send the arguments through the mapping process
         result = Array.new.tap do |result_args|
           args.each_with_index do |arg, i|
-            logger.debug("mapping funcspec value #{arg.inspect} to expected type #{expect[i]}")
+            logger.debug { "mapping funcspec value #{arg.inspect} to expected type #{expect[i]}" }
             result_args << map(arg, *(extra_args + result_args), to: expect[i])
           end
         end
@@ -358,7 +358,7 @@ module VagrantPlugins
             "FuncSpec value of type `#{v.class}' has no valid mappers"
         end
         result = m.first.call(v)
-        logger.trace("converted funcspec argument #{v} -> #{result}")
+        logger.trace { "converted funcspec argument #{v} -> #{result}" }
         result
       end
     end
diff --git a/plugins/commands/serve/mappers/direct.rb b/plugins/commands/serve/mappers/direct.rb
index 0c713c4f4..6ca23d852 100644
--- a/plugins/commands/serve/mappers/direct.rb
+++ b/plugins/commands/serve/mappers/direct.rb
@@ -40,7 +40,7 @@ module VagrantPlugins
             begin
               mappers.map(v)
             rescue => err
-              logger.debug("Failed to map value #{v} - #{err}\n#{err.backtrace.join("\n")}")
+              logger.debug { "Failed to map value #{v} - #{err}\n#{err.backtrace.join("\n")}" }
               raise
             end
           end
@@ -64,7 +64,7 @@ module VagrantPlugins
             begin
               mappers.map(a, to: Google::Protobuf::Any)
             rescue => err
-              logger.debug("Failed to map value #{a} - #{err}\n#{err.backtrace.join("\n")}")
+              logger.debug { "Failed to map value #{a} - #{err}\n#{err.backtrace.join("\n")}" }
               raise
             end
           end
diff --git a/plugins/commands/serve/mappers/environment.rb b/plugins/commands/serve/mappers/environment.rb
index 750dc9c54..3f5e1a237 100644
--- a/plugins/commands/serve/mappers/environment.rb
+++ b/plugins/commands/serve/mappers/environment.rb
@@ -16,7 +16,7 @@ module VagrantPlugins
         def converter(project, ui, cacher)
           cid = project.resource_id
           return cacher.get(cid) if cacher.registered?(cid)
-          logger.warn("cache miss for environment with project resource id #{cid} cache=#{cacher} !!")
+          logger.warn { "cache miss for environment with project resource id #{cid} cache=#{cacher} !!" }
           env = Vagrant::Environment.new(ui: ui, client: project)
           cacher.register(cid, env)
           env
@@ -66,7 +66,7 @@ module VagrantPlugins
         def converter(project, cacher, mapper)
           cid = project.resource_id
           return cacher.get(cid) if cacher.registered?(cid)
-          logger.warn("cache miss for environment with project resource id #{cid} cache=#{cacher}")
+          logger.warn { "cache miss for environment with project resource id #{cid} cache=#{cacher}" }
           ui = mapper.map(project, to: Vagrant::UI::Remote)
           env = Vagrant::Environment.new(client: project, ui: ui)
           cacher.register(cid, env)
diff --git a/plugins/commands/serve/mappers/internal/graph/search.rb b/plugins/commands/serve/mappers/internal/graph/search.rb
index f87ea019f..107411b40 100644
--- a/plugins/commands/serve/mappers/internal/graph/search.rb
+++ b/plugins/commands/serve/mappers/internal/graph/search.rb
@@ -36,7 +36,8 @@ module VagrantPlugins
             # @raises [NoPathError] when no path can be determined
             def path(src, dst)
               @m.synchronize do
-                logger.debug("finding path #{src} -> #{dst}")
+                logger.debug { "finding path #{src} -> #{dst}" }
+
                 @root = src
 
                 # We know the root is our final destination, so flop the graph before searching
@@ -67,8 +68,8 @@ module VagrantPlugins
                   graph.remove_vertex(v)
                 }
 
-                logger.trace("graph after DFS reduction:\n#{graph.reverse.inspect}")
-                logger.trace("generating list of required vertices for path #{src} -> #{dst}")
+                logger.trace { "graph after DFS reduction:\n#{graph.reverse.inspect}" }
+                logger.trace { "generating list of required vertices for path #{src} -> #{dst}" }
 
                 if !graph.vertices.include?(src)
                   raise NoPathError,
@@ -88,7 +89,7 @@ module VagrantPlugins
                     "Path generation failed to reach destination (#{src} -> #{dst&.type&.inspect})"
                 end
 
-                logger.trace("required vertices list generation complete for path #{src} -> #{dst}")
+                logger.trace { "required vertices list generation complete for path #{src} -> #{dst}" }
 
                 # Remove all extraneous vertices
                 (graph.vertices - required_vertices).each do |vrt|
@@ -98,7 +99,7 @@ module VagrantPlugins
                 graph.reverse!
                 graph.break_cycles!(src) if !graph.acyclic?
 
-                logger.debug("graph after acyclic breakage:\n#{graph.reverse.inspect}")
+                logger.debug { "graph after acyclic breakage:\n#{graph.reverse.inspect}" }
 
                 # Apply topological sort to the graph so we have
                 # a proper order for execution
@@ -137,17 +138,19 @@ module VagrantPlugins
             def generate_path(src, dst)
               begin
                 path = graph.shortest_path(src, dst)
-                o = Array(path).reverse.map { |v|
-                  "  #{v} ->"
-                }.join("\n")
-                logger.trace("path generation #{dst} -> #{src}\n#{o}")
+                logger.trace {
+                  o = Array(path).reverse.map { |v|
+                    "  #{v} ->"
+                  }.join("\n")
+                  "path generation #{dst} -> #{src}\n#{o}"
+                }
                 if path.nil?
                   raise NoPathError,
                     "Path generation failed to reach destination (#{dst} -> #{src})"
                 end
                 expand_path(path, dst, graph)
               rescue InvalidVertex => err
-                logger.trace("invalid vertex in path, removing (#{err.vertex})")
+                logger.trace { "invalid vertex in path, removing (#{err.vertex})" }
                 graph.remove_vertex(err.vertex)
                 retry
               end
@@ -158,22 +161,22 @@ module VagrantPlugins
               path.each do |v|
                 new_path << v
                 next if !v.incoming_edges_required
-                logger.trace("validating incoming edges for vertex #{v}")
+                logger.trace { "validating incoming edges for vertex #{v}" }
                 outs = graph.out_vertices(v)
                 g = graph.clone
                 g.remove_vertex(v)
                 outs.each do |src|
                   ipath = g.shortest_path(src, dst)
                   if ipath.nil? || ipath.empty?
-                    logger.trace("failed to find validating path from #{dst} -> #{src}")
+                    logger.trace { "failed to find validating path from #{dst} -> #{src}" }
                     raise InvalidVertex.new(v)
                   else
-                    logger.trace("found validating path from #{dst} -> #{src}")
+                    logger.trace { "found validating path from #{dst} -> #{src}" }
                   end
                   ipath = expand_path(ipath, dst,  g)
                   new_path += ipath
                 end
-                logger.trace("incoming edge validation complete for vertex #{v}")
+                logger.trace { "incoming edge validation complete for vertex #{v}" }
               end
               new_path
             end
diff --git a/plugins/commands/serve/mappers/known_types.rb b/plugins/commands/serve/mappers/known_types.rb
index 0c66558d7..6e524c208 100644
--- a/plugins/commands/serve/mappers/known_types.rb
+++ b/plugins/commands/serve/mappers/known_types.rb
@@ -53,7 +53,7 @@ module VagrantPlugins
             end
             SDK::Args::Array.new(list: r)
           rescue => err
-            logger.error("array mapping to proto failed: #{err}")
+            logger.error { "array mapping to proto failed: #{err}" }
             raise
           end
         end
@@ -83,7 +83,7 @@ module VagrantPlugins
               r
             end
           rescue => err
-            logger.error("proto mapping to array failed: #{err}")
+            logger.error { "proto mapping to array failed: #{err}" }
             raise
           end
         end
@@ -128,7 +128,7 @@ module VagrantPlugins
             end
             SDK::Args::Hash.new(fields: fields)
           rescue => err
-            logger.error("hash mapping to proto failed: #{err}")
+            logger.error { "hash mapping to proto failed: #{err}" }
             raise
           end
         end
@@ -178,7 +178,7 @@ module VagrantPlugins
               end
             end
           rescue => err
-            logger.error("proto mapping to hash failed: #{err}")
+            logger.error { "proto mapping to hash failed: #{err}" }
             raise
           end
         end
diff --git a/plugins/commands/serve/mappers/mapper.rb b/plugins/commands/serve/mappers/mapper.rb
index 8dc7035cd..c6dda3652 100644
--- a/plugins/commands/serve/mappers/mapper.rb
+++ b/plugins/commands/serve/mappers/mapper.rb
@@ -72,7 +72,7 @@ module VagrantPlugins
             if m.output.ancestors.include?(Google::Protobuf::MessageExts)
               names = registered.map(&:name)
               next if names.include?("#{m.output.name}ToAny")
-              logger.trace("generating new Any converter #{m.output.name}ToAny")
+              logger.trace { "generating new Any converter #{m.output.name}ToAny" }
               Class.new(Mapper).class_eval("
                 def self.name
                   '#{m.output.name}' + 'ToAny'
@@ -173,7 +173,7 @@ module VagrantPlugins
                 input.valid?(arg)
               end
               if value.nil? && input.type != NilClass
-                logger.error("missing input for type `#{input.type}' - #{args.inspect}")
+                logger.error { "missing input for type `#{input.type}' - #{args.inspect}" }
                 raise ArgumentError,
                   "Failed to locate required argument of type `#{input.type}'"
               end