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#!/usr/bin/env python
#
# Copyright (c), 2021, SISSA (International School for Advanced Studies).
# All rights reserved.
# This file is distributed under the terms of the MIT License.
# See the file 'LICENSE' in the root directory of the present
# distribution, or http://opensource.org/licenses/MIT.
#
# @author Davide Brunato <brunato@sissa.it>
#
from timeit import timeit
from memory_profiler import profile
from elementpath import XPath1Parser
from xpath_tokens import ValueToken
def run_timeit(stmt='pass', setup='pass', number=1000):
seconds = timeit(stmt, setup=setup, number=number)
print("{}: {}s".format(stmt, seconds))
@profile
def xpath_token_objects():
true_token = XPath1Parser.symbol_table['true']
return [true_token(parser) for _ in range(10000)]
if __name__ == '__main__':
print('*' * 62)
print("*** Memory and timing profile of XPathToken class ***")
print("***" + ' ' * 56 + "***")
print("*** Note: save ~34% of memory with __slots__ (from v2.2.3) ***")
print('*' * 62)
print()
parser = XPath1Parser()
xpath_token_objects()
t1 = parser.parse('18 - 9 + 10')
t2 = parser.parse('true()')
t3 = parser.parse('contains("foobar", "bar")')
NUMBER = 30000
print("*** Profile evaluation ***\n")
run_timeit('t1.evaluate() # 19 ', 'from __main__ import t1', NUMBER)
run_timeit('t2.evaluate() # True ', 'from __main__ import t2', NUMBER)
run_timeit('t3.evaluate() # True ', 'from __main__ import t3', NUMBER)
print()
print("*** Profile MutableSequence operations ***\n")
tk = ValueToken(parser, 1)
SETUP = 'from __main__ import tk'
run_timeit('tk.extend((1, 2, 3))', SETUP, NUMBER)
run_timeit('tk._items.extend((1, 2, 3))', SETUP, NUMBER)
print()
run_timeit('tk[:] = (1, 2, 3)', SETUP, NUMBER)
run_timeit('tk._items[:] = (1, 2, 3)', SETUP, NUMBER)
print()
run_timeit('tk.append(1); tk.append(2); tk.append(3)', SETUP, NUMBER)
run_timeit('tk._items.append(1); tk._items.append(2); tk._items.append(3)', SETUP, NUMBER)
print()
run_timeit('tk.append(1)', SETUP, NUMBER)
run_timeit('tk._items.append(1)', SETUP, NUMBER)
print()
run_timeit('tk.append(1); tk[0]', SETUP, NUMBER)
run_timeit('tk._items.append(1); tk._items[0]', SETUP, NUMBER)
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