diff options
Diffstat (limited to 'Tools/scripts/var_access_benchmark.py')
| -rw-r--r-- | Tools/scripts/var_access_benchmark.py | 297 |
1 files changed, 0 insertions, 297 deletions
diff --git a/Tools/scripts/var_access_benchmark.py b/Tools/scripts/var_access_benchmark.py deleted file mode 100644 index 03b712d..0000000 --- a/Tools/scripts/var_access_benchmark.py +++ /dev/null @@ -1,297 +0,0 @@ -'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__)) |