Attached is the script I used to compare python-ldap with ldapsearch. Script
ran on same machine as the ldap server. The two envirnments teste used
fairly recent openldaps and in one case had python-ldap 2.0.0(pre6), the
other was more recent. Ratio of python-ldap:ldapsearch seemed constant
regardless of version.
Ed
#!/home/zope/bin/python
from os import system, remove
from posix import getpid, close
from random import random
import time
import ldap, string
search='(cn=*)'
host='localhost'
port=389
uname=""
pw=""
# set your directory base here
base = "dc=da,dc=mod,dc=uk"
iter = 1000
raw = []
def timeit(fn):
start = time.time()
fn()
return time.time() - start
# Search whole directory, returning all attributes, python and command line
versions
def dump_all_py():
global base, search, raw
raw = l.search_s(base, ldap.SCOPE_SUBTREE, search)
def dump_all_sh():
cmd = 'ldapsearch -h %s -p %i -b "%s" -s sub -x -D "%s" -w "%s" \'%s\'
>/dev/null' % \
(host, port, base, uname, pw, search)
system(cmd)
#print cmd
# Search whole directory, returning cn, python and command line versions
def dump_cn_py():
global base, search, raw
raw = l.search_s(base, ldap.SCOPE_SUBTREE, search, ['cn'])
def dump_cn_sh():
cmd = 'ldapsearch -h %s -p %i -b "%s" -s sub -x -D "%s" -w "%s" \'%s\'
%s >/dev/null' % \
(host, port, base, uname, pw, search, 'cn')
system(cmd)
#print cmd
# Python cn lookup, exact and initial substring versions
def lk_exact_py():
global ents, base
for cn in ents:
search = '(cn=%s)' % (cn)
entry = l.search_s(base, ldap.SCOPE_SUBTREE, search)
def lk_sub_py():
global ents, base
for cn in ents:
search = '(cn=%s*)' % (cn)
entry = l.search_s(base, ldap.SCOPE_SUBTREE, search)
# Command line cn lookup, exact and initial substring versions
# Prepare datafiles for use with command line lookups
def prep_sh_data():
global ents, base, tmpf1, tmpf2
tmpf1 = '/tmp/ldap%d-1' % (getpid())
tmpf2 = '/tmp/ldap%d-2' % (getpid())
t1 = open(tmpf1, 'w')
t2 = open(tmpf2, 'w')
for cn in ents:
print >>t1, cn
print >>t2, cn+'*'
t1.close()
t2.close()
cmdstring = 'ldapsearch -f %s -h %s -p %i -b "%s" -s sub -x -D "%s" -w "%s"
%s>/dev/null'
def lk_exact_sh():
global base, tmpf1
cmd = cmdstring % (tmpf1, host, port, base, uname, pw, "'(cn=%s)'")
system(cmd)
#print cmd
def lk_sub_sh():
global base, tmpf2
cmd = cmdstring % (tmpf2, host, port, base, uname, pw, "'(cn=%s*)'")
system(cmd)
#print cmd
l = ldap.initialize('ldap://%s:%s' % (host, port))
l.simple_bind_s(uname, pw)
print 'Reading complete directory all attributes'
elapsed = timeit(dump_all_py)
ct = len(raw)
print 'PY: %i entries in %5.2f secs, %5.2f entries/sec' % (ct, elapsed,
ct/elapsed)
elapsed = timeit(dump_all_sh)
l = ldap.initialize('ldap://%s:%s' % (host, port))
l.simple_bind_s(uname, pw)
print 'Reading complete directory all attributes'
elapsed = timeit(dump_all_py)
ct = len(raw)
print 'PY: %i entries in %5.2f secs, %5.2f entries/sec' % (ct, elapsed,
ct/elapsed)
elapsed = timeit(dump_all_sh)
print ' C: %i entries in %5.2f secs, %5.2f entries/sec' % (ct, elapsed,
ct/elapsed)
print '\nReading complete directory, single attribute'
raw=[]
elapsed = timeit(dump_cn_py)
ct = len(raw)
print 'PY: %i entries in %5.2f secs, %5.2f entries/sec' % (ct, elapsed,
ct/elapsed)
elapsed = timeit(dump_cn_sh)
print ' C: %i entries in %5.2f secs, %5.2f entries/sec' % (ct, elapsed,
ct/elapsed)
# First build up a list of entries to lookup
ents = []
i = 0
while i < iter:
e = int(random()*ct)
# N.B. sort this out!
ents.append(raw[e][1]['cn'][0])
i += 1
print '\n%i lookups (exact match)' % (iter)
elapsed = timeit(lk_exact_py)
print 'PY: %5.2f secs, %5.2f entries/sec' % (elapsed, iter/elapsed)
prep_sh_data()
elapsed = timeit(lk_exact_sh)
print ' C: %5.2f secs, %5.2f entries/sec' % (elapsed, iter/elapsed)
print '\n%i lookups (substring)' % (iter)
elapsed = timeit(lk_sub_py)
print 'PY: %5.2f secs, %5.2f entries/sec' % (elapsed, iter/elapsed)
elapsed = timeit(lk_sub_sh)
print ' C: %5.2f secs, %5.2f entries/sec' % (elapsed, iter/elapsed)
remove(tmpf1)
remove(tmpf2)
l.unbind_s()
_________________________________________________________________
Stay in touch with absent friends - get MSN Messenger
http://www.msn.co.uk/messenger
|
