Here's the code:
#!/usr/local/pypy-1.9/bin/pypy
#!/usr/bin/python
import sys
import time
import StringIO
sys.path.insert(0, '/usr/local/lib')
import bufsock
def create_file_numbers_old(filename, size):
start = time.clock()
value = 0
with open(filename, "w") as f:
while f.tell() < size:
f.write("{0}\n".format(value))
value += 1
end = time.clock()
print "time taken to write a file of size", size, " is ", (end
-start), "seconds \n"
def create_file_numbers_bufsock(filename, intended_size):
start = time.clock()
value = 0
with open(filename, "w") as f:
bs = bufsock.bufsock(f)
actual_size = 0
while actual_size < intended_size:
string = "{0}\n".format(value)
actual_size += len(string) + 1
bs.write(string)
value += 1
bs.flush()
end = time.clock()
print "time taken to write a file of size", intended_size, " is ",
(end -start), "seconds \n"
def create_file_numbers_file_like(filename, intended_size):
start = time.clock()
value = 0
with open(filename, "w") as f:
file_like = StringIO.StringIO()
actual_size = 0
while actual_size < intended_size:
string = "{0}\n".format(value)
actual_size += len(string) + 1
file_like.write(string)
value += 1
file_like.seek(0)
f.write(file_like.read())
end = time.clock()
print "time taken to write a file of size", intended_size, " is ",
(end -start), "seconds \n"
create_file_numbers_old('output.txt', 50 * 2**20)
create_file_numbers_bufsock('output2.txt', 50 * 2**20)
create_file_numbers_file_like('output3.txt', 50 * 2**20)
On Thu, May 16, 2013 at 9:35 PM,
size = 50mb
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