use monotonic clock if possible on Ruby 2.1+

The monotonic clock is immune to discontinuous time jumps while
still taking into account clock imperfections, making it appropriate
for calculating time differences and timeouts.

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/mogilefs/new_file/common.rb b/lib/mogilefs/new_file/common.rb
index b901f67..c102901 100644
--- a/lib/mogilefs/new_file/common.rb
+++ b/lib/mogilefs/new_file/common.rb
@@ -20,7 +20,7 @@ module MogileFS::NewFile::Common
 
   def read_response(sock)
     tout = @opts[:new_file_max_time] || 3600.0
-    start_time = @opts[:start_time] and tout -= Time.now - start_time
+    start_time = @opts[:start_time] and tout -= MogileFS.now - start_time
     set_socket_options(sock)
     case line = sock.timed_read(23, "", tout > 0.0 ? tout : 0)
     when %r{^HTTP/\d\.\d\s+(2\d\d)\s} # success!