Python benchmark script

[Ed . <ep...@ho...>]

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()

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