Hi Corinna, I have tested the latest (2016-06-06) snapshot. No problem is found. I evaluated the response of vim in several environments using a test case attached. This test case measures the time for (open a file + scroll up/down 100 times + quit) in vim. Results are as follows. The latest snapshot is the fastest! It's 13% faster than 2.5.1. You did it! Machine1: Windows 7 (64bit) + Cygwin 64bit cygwin 2.5.1 : 1.035133 second snapshot (2016-05-31): 58.479826 second snapshot (2016-06-06): 0.898675 second Machine1: Windows 7 (64bit) + Cygwin 32bit cygwin 2.5.1 : 1.242907 second snapshot (2016-05-31): 57.491763 second snapshot (2016-06-06): 0.911885 second Machine2: Windows 7 (64bit) + Cygwin 64bit cygwin 2.5.1 : 0.688432 second snapshot (2016-05-31): 462.305977 second snapshot (2016-06-06): 0.596733 second Machine2: Windows 7 (64bit) + Cygwin 32bit cygwin 2.5.1 : 0.761117 second snapshot (2016-05-31): 462.280320 second snapshot (2016-06-06): 0.660631 second Machine2: Windows 10 (64bit) + Cygwin 64bit cygwin 2.5.1 : 0.676545 second snapshot (2016-05-31): 0.599878 second snapshot (2016-06-06): 0.599495 second Machine2: Windows 10 (64bit) + Cygwin 32bit cygwin 2.5.1 : 0.784049 second snapshot (2016-05-31): 0.675585 second snapshot (2016-06-06): 0.675050 second -- Takashi Yano