Gecko [ edgpens.lpkmn.gov.my ]

Name	Size	Permission
__pycache__	[ DIR ]	drwxrwxrwx
2to3.py	101 B	-rw-rw-rw-
abitype.py	5.64 KB	-rw-rw-rw-
analyze_dxp.py	4.21 KB	-rw-rw-rw-
byext.py	3.94 KB	-rw-rw-rw-
byteyears.py	1.67 KB	-rw-rw-rw-
checkpip.py	825 B	-rw-rw-rw-
cleanfuture.py	8.69 KB	-rw-rw-rw-
combinerefs.py	4.48 KB	-rw-rw-rw-
copytime.py	689 B	-rw-rw-rw-
crlf.py	655 B	-rw-rw-rw-
db2pickle.py	3.68 KB	-rw-rw-rw-
diff.py	2.26 KB	-rw-rw-rw-
dutree.py	1.66 KB	-rw-rw-rw-
eptags.py	1.6 KB	-rw-rw-rw-
find-uname.py	1.22 KB	-rw-rw-rw-
find_recursionlimit.py	4.03 KB	-rw-rw-rw-
finddiv.py	2.56 KB	-rw-rw-rw-
findlinksto.py	1.09 KB	-rw-rw-rw-
findnocoding.py	2.99 KB	-rw-rw-rw-
fixcid.py	10.24 KB	-rw-rw-rw-
fixdiv.py	14.28 KB	-rw-rw-rw-
fixheader.py	1.38 KB	-rw-rw-rw-
fixnotice.py	3.06 KB	-rw-rw-rw-
fixps.py	923 B	-rw-rw-rw-
generate_opcode_h.py	2.25 KB	-rw-rw-rw-
generate_stdlib_module_names.p...	4.7 KB	-rw-rw-rw-
generate_token.py	7.08 KB	-rw-rw-rw-
get-remote-certificate.py	2.7 KB	-rw-rw-rw-
google.py	526 B	-rw-rw-rw-
gprof2html.py	2.33 KB	-rw-rw-rw-
highlight.py	9.21 KB	-rw-rw-rw-
ifdef.py	3.73 KB	-rw-rw-rw-
import_diagnostics.py	1.01 KB	-rw-rw-rw-
lfcr.py	664 B	-rw-rw-rw-
linktree.py	2.46 KB	-rw-rw-rw-
lll.py	775 B	-rw-rw-rw-
mailerdaemon.py	8.09 KB	-rw-rw-rw-
make_ctype.py	2.32 KB	-rw-rw-rw-
md5sum.py	2.55 KB	-rw-rw-rw-
mkreal.py	1.66 KB	-rw-rw-rw-
ndiff.py	3.86 KB	-rw-rw-rw-
nm2def.py	2.53 KB	-rw-rw-rw-
objgraph.py	6.01 KB	-rw-rw-rw-
parse_html5_entities.py	4.01 KB	-rw-rw-rw-
parseentities.py	1.76 KB	-rw-rw-rw-
patchcheck.py	10.81 KB	-rw-rw-rw-
pathfix.py	6.85 KB	-rw-rw-rw-
pdeps.py	4.07 KB	-rw-rw-rw-
pep384_macrocheck.py	4.75 KB	-rw-rw-rw-
pickle2db.py	4.07 KB	-rw-rw-rw-
pindent.py	17.22 KB	-rw-rw-rw-
ptags.py	1.34 KB	-rw-rw-rw-
pydoc3.py	85 B	-rw-rw-rw-
pysource.py	3.9 KB	-rw-rw-rw-
reindent-rst.py	293 B	-rw-rw-rw-
reindent.py	11.7 KB	-rw-rw-rw-
rgrep.py	1.61 KB	-rw-rw-rw-
run_tests.py	1.83 KB	-rw-rw-rw-
serve.py	1.23 KB	-rw-rw-rw-
smelly.py	5.07 KB	-rw-rw-rw-
stable_abi.py	20.91 KB	-rw-rw-rw-
suff.py	536 B	-rw-rw-rw-
texi2html.py	70.75 KB	-rw-rw-rw-
untabify.py	1.32 KB	-rw-rw-rw-
update_file.py	790 B	-rw-rw-rw-
var_access_benchmark.py	11.92 KB	-rw-rw-rw-
verify_ensurepip_wheels.py	3.21 KB	-rw-rw-rw-
which.py	1.71 KB	-rw-rw-rw-
win_add2path.py	1.68 KB	-rw-rw-rw-

Code Editor : var_access_benchmark.py

'Show relative speeds of local, nonlocal, global, and built-in access.'

# Please leave this code so that it runs under older versions of
# Python 3 (no f-strings).  That will allow benchmarking for
# cross-version comparisons.  To run the benchmark on Python 2,
# comment-out the nonlocal reads and writes.

from collections import deque, namedtuple

trials = [None] * 500
steps_per_trial = 25

class A(object):
    def m(self):
        pass

class B(object):
    __slots__ = 'x'
    def __init__(self, x):
        self.x = x

class C(object):
    def __init__(self, x):
        self.x = x

def read_local(trials=trials):
    v_local = 1
    for t in trials:
        v_local;    v_local;    v_local;    v_local;    v_local
        v_local;    v_local;    v_local;    v_local;    v_local
        v_local;    v_local;    v_local;    v_local;    v_local
        v_local;    v_local;    v_local;    v_local;    v_local
        v_local;    v_local;    v_local;    v_local;    v_local

def make_nonlocal_reader():
    v_nonlocal = 1
    def inner(trials=trials):
        for t in trials:
            v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
            v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
            v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
            v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
            v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal; v_nonlocal
    inner.__name__ = 'read_nonlocal'
    return inner

read_nonlocal = make_nonlocal_reader()

v_global = 1
def read_global(trials=trials):
    for t in trials:
        v_global; v_global; v_global; v_global; v_global
        v_global; v_global; v_global; v_global; v_global
        v_global; v_global; v_global; v_global; v_global
        v_global; v_global; v_global; v_global; v_global
        v_global; v_global; v_global; v_global; v_global

def read_builtin(trials=trials):
    for t in trials:
        oct; oct; oct; oct; oct
        oct; oct; oct; oct; oct
        oct; oct; oct; oct; oct
        oct; oct; oct; oct; oct
        oct; oct; oct; oct; oct

def read_classvar_from_class(trials=trials, A=A):
    A.x = 1
    for t in trials:
        A.x;    A.x;    A.x;    A.x;    A.x
        A.x;    A.x;    A.x;    A.x;    A.x
        A.x;    A.x;    A.x;    A.x;    A.x
        A.x;    A.x;    A.x;    A.x;    A.x
        A.x;    A.x;    A.x;    A.x;    A.x

def read_classvar_from_instance(trials=trials, A=A):
    A.x = 1
    a = A()
    for t in trials:
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x

def read_instancevar(trials=trials, a=C(1)):
    for t in trials:
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x

def read_instancevar_slots(trials=trials, a=B(1)):
    for t in trials:
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x

def read_namedtuple(trials=trials, D=namedtuple('D', ['x'])):
    a = D(1)
    for t in trials:
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x
        a.x;    a.x;    a.x;    a.x;    a.x

def read_boundmethod(trials=trials, a=A()):
    for t in trials:
        a.m;    a.m;    a.m;    a.m;    a.m
        a.m;    a.m;    a.m;    a.m;    a.m
        a.m;    a.m;    a.m;    a.m;    a.m
        a.m;    a.m;    a.m;    a.m;    a.m
        a.m;    a.m;    a.m;    a.m;    a.m

def write_local(trials=trials):
    v_local = 1
    for t in trials:
        v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
        v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
        v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
        v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1
        v_local = 1; v_local = 1; v_local = 1; v_local = 1; v_local = 1

def make_nonlocal_writer():
    v_nonlocal = 1
    def inner(trials=trials):
        nonlocal v_nonlocal
        for t in trials:
            v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
            v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
            v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
            v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
            v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1; v_nonlocal = 1
    inner.__name__ = 'write_nonlocal'
    return inner

write_nonlocal = make_nonlocal_writer()

def write_global(trials=trials):
    global v_global
    for t in trials:
        v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
        v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
        v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
        v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1
        v_global = 1; v_global = 1; v_global = 1; v_global = 1; v_global = 1

def write_classvar(trials=trials, A=A):
    for t in trials:
        A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1
        A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1
        A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1
        A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1
        A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1;    A.x = 1

def write_instancevar(trials=trials, a=C(1)):
    for t in trials:
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1

def write_instancevar_slots(trials=trials, a=B(1)):
    for t in trials:
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1
        a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1;    a.x = 1

def read_list(trials=trials, a=[1]):
    for t in trials:
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]

def read_deque(trials=trials, a=deque([1])):
    for t in trials:
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]

def read_dict(trials=trials, a={0: 1}):
    for t in trials:
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]
        a[0];   a[0];   a[0];   a[0];   a[0]

def read_strdict(trials=trials, a={'key': 1}):
    for t in trials:
        a['key'];   a['key'];   a['key'];   a['key'];   a['key']
        a['key'];   a['key'];   a['key'];   a['key'];   a['key']
        a['key'];   a['key'];   a['key'];   a['key'];   a['key']
        a['key'];   a['key'];   a['key'];   a['key'];   a['key']
        a['key'];   a['key'];   a['key'];   a['key'];   a['key']

def list_append_pop(trials=trials, a=[1]):
    ap, pop = a.append, a.pop
    for t in trials:
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()

def deque_append_pop(trials=trials, a=deque([1])):
    ap, pop = a.append, a.pop
    for t in trials:
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop()

def deque_append_popleft(trials=trials, a=deque([1])):
    ap, pop = a.append, a.popleft
    for t in trials:
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop();
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop();
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop();
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop();
        ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop(); ap(1); pop();

def write_list(trials=trials, a=[1]):
    for t in trials:
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1

def write_deque(trials=trials, a=deque([1])):
    for t in trials:
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1

def write_dict(trials=trials, a={0: 1}):
    for t in trials:
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1
        a[0]=1; a[0]=1; a[0]=1; a[0]=1; a[0]=1

def write_strdict(trials=trials, a={'key': 1}):
    for t in trials:
        a['key']=1; a['key']=1; a['key']=1; a['key']=1; a['key']=1
        a['key']=1; a['key']=1; a['key']=1; a['key']=1; a['key']=1
        a['key']=1; a['key']=1; a['key']=1; a['key']=1; a['key']=1
        a['key']=1; a['key']=1; a['key']=1; a['key']=1; a['key']=1
        a['key']=1; a['key']=1; a['key']=1; a['key']=1; a['key']=1

def loop_overhead(trials=trials):
    for t in trials:
        pass

if __name__=='__main__':

from timeit import Timer

for f in [
            'Variable and attribute read access:',
            read_local, read_nonlocal, read_global, read_builtin,
            read_classvar_from_class, read_classvar_from_instance,
            read_instancevar, read_instancevar_slots,
            read_namedtuple, read_boundmethod,
            '\nVariable and attribute write access:',
            write_local, write_nonlocal, write_global,
            write_classvar, write_instancevar, write_instancevar_slots,
            '\nData structure read access:',
            read_list, read_deque, read_dict, read_strdict,
            '\nData structure write access:',
            write_list, write_deque, write_dict, write_strdict,
            '\nStack (or queue) operations:',
            list_append_pop, deque_append_pop, deque_append_popleft,
            '\nTiming loop overhead:',
            loop_overhead]:
        if isinstance(f, str):
            print(f)
            continue
        timing = min(Timer(f).repeat(7, 1000))
        timing *= 1000000 / (len(trials) * steps_per_trial)
        print('{:6.1f} ns\t{}'.format(timing, f.__name__))

${this.title}

Code Editor : var_access_benchmark.py