stackprof.rb in rack-stackprof-0.2.1

- old
+ new

@@ -5,11 +5,11 @@
   def initialize(app, options = {})
     @app = app
     @profile_interval_seconds = options.fetch(:profile_interval_seconds)
     @sampling_interval_microseconds = options.fetch(:sampling_interval_microseconds)
     @last_profiled_at = nil
-    StackProf::Middleware.path = options.fetch(:result_directory) # for `StackProf::Middleware.save`
+    @result_directory = options.fetch(:result_directory) # for `StackProf::Middleware.save`
   end
 
   def call(env)
     # Profile every X seconds (not everytime) to prevent from consuming disk excessively
     profile_every(seconds: @profile_interval_seconds, env: env) do
@@ -34,10 +34,10 @@
     yield
   ensure
     StackProf.stop
     finished_at = Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_microsecond)
 
-    StackProf::Middleware.path = result_filename(env: env, duration_milliseconds: (finished_at - started_at) / 1000)
+    StackProf::Middleware.path = File.join(@result_directory, result_filename(env: env, duration_milliseconds: (finished_at - started_at) / 1000))
     StackProf::Middleware.save
   end
 
   # ex: "stackprof-20171004_175816-41860-GET_v1_users-0308ms.dump"
   def result_filename(env:, duration_milliseconds:)