Correctly pass results in markdown benchmark

spec/benchmarks/banzai_benchmark.rb

@@ -88,12 +88,15 @@ RSpec.describe 'GitLab Markdown Benchmark', :aggregate_failures do
   def build_filter_text(pipeline, initial_text)
     filter_source = {}
     input_text    = initial_text
+    result        = nil
 
     pipeline.filters.each do |filter_klass|
-      filter_source[filter_klass] = input_text
+      filter = filter_klass.new(input_text, context, result)
+      output = filter.call
 
-      output = filter_klass.call(input_text, context)
+      filter_source[filter_klass] = { input_text: input_text, input_result: result }
       input_text = output
+      result = filter.result
     end
 
     filter_source
@@ -111,7 +114,12 @@ RSpec.describe 'GitLab Markdown Benchmark', :aggregate_failures do
       pipeline.filters.each do |filter_klass|
         label = filter_klass.name.demodulize.delete_suffix('Filter').truncate(20)
 
-        x.report(label) { filter_klass.call(filter_source[filter_klass], context) }
+        x.report(label) do
+          filter = filter_klass.new(filter_source[filter_klass][:input_text],
+                                    context,
+                                    filter_source[filter_klass][:input_result])
+          filter.call
+        end
       end
 
       x.compare!