Issue674932

Consider:

file = open("PrintTest.txt",'w')
item = "some, comma, separated, values"
for i in range(10000):
  print >> file, item
#  file.write(item)
#  file.write('\n')

file.close()


1. it seems that in general we force to write to disk 
instead of simply passing buffer data along to the OS 
each time a buffer is full, isn't that too often?

2. print is implemented so to flush to buffer very often 
(each line (?)), this should be in principle decided by 
the underlying file not at print impl level.


[Workarounds: increase buffer size (?), using file.write 
instead of print ]

This should have been fixed by the pynio work.