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author | Brett Cannon <brett@python.org> | 2012-07-20 18:54:53 (GMT) |
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committer | Brett Cannon <brett@python.org> | 2012-07-20 18:54:53 (GMT) |
commit | d382bfc921b4f3c445240b99d6853fe97349b225 (patch) | |
tree | 4fe81ff69ec32c84a94a39ab400d08c6f4de3274 /Lib/test/test_importlib | |
parent | 45a5e3afe52ed89f298242143c5f7e2bb992ac63 (diff) | |
download | cpython-d382bfc921b4f3c445240b99d6853fe97349b225.zip cpython-d382bfc921b4f3c445240b99d6853fe97349b225.tar.gz cpython-d382bfc921b4f3c445240b99d6853fe97349b225.tar.bz2 |
Move importlib.test.benchmark to Tools/importbench to make it more
visible and to place it with other micro-benchmarks (e.g.
stringbench).
Diffstat (limited to 'Lib/test/test_importlib')
-rw-r--r-- | Lib/test/test_importlib/benchmark.py | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/Lib/test/test_importlib/benchmark.py b/Lib/test/test_importlib/benchmark.py deleted file mode 100644 index 183e818..0000000 --- a/Lib/test/test_importlib/benchmark.py +++ /dev/null @@ -1,252 +0,0 @@ -"""Benchmark some basic import use-cases. - -The assumption is made that this benchmark is run in a fresh interpreter and -thus has no external changes made to import-related attributes in sys. - -""" -from . import util -from .source import util as source_util -import decimal -import imp -import importlib -import importlib.machinery -import json -import os -import py_compile -import sys -import tabnanny -import timeit - - -def bench(name, cleanup=lambda: None, *, seconds=1, repeat=3): - """Bench the given statement as many times as necessary until total - executions take one second.""" - stmt = "__import__({!r})".format(name) - timer = timeit.Timer(stmt) - for x in range(repeat): - total_time = 0 - count = 0 - while total_time < seconds: - try: - total_time += timer.timeit(1) - finally: - cleanup() - count += 1 - else: - # One execution too far - if total_time > seconds: - count -= 1 - yield count // seconds - -def from_cache(seconds, repeat): - """sys.modules""" - name = '<benchmark import>' - module = imp.new_module(name) - module.__file__ = '<test>' - module.__package__ = '' - with util.uncache(name): - sys.modules[name] = module - for result in bench(name, repeat=repeat, seconds=seconds): - yield result - - -def builtin_mod(seconds, repeat): - """Built-in module""" - name = 'errno' - if name in sys.modules: - del sys.modules[name] - # Relying on built-in importer being implicit. - for result in bench(name, lambda: sys.modules.pop(name), repeat=repeat, - seconds=seconds): - yield result - - -def source_wo_bytecode(seconds, repeat): - """Source w/o bytecode: small""" - sys.dont_write_bytecode = True - try: - name = '__importlib_test_benchmark__' - # Clears out sys.modules and puts an entry at the front of sys.path. - with source_util.create_modules(name) as mapping: - assert not os.path.exists(imp.cache_from_source(mapping[name])) - sys.meta_path.append(importlib.machinery.PathFinder) - loader = (importlib.machinery.SourceFileLoader, - importlib.machinery.SOURCE_SUFFIXES, True) - sys.path_hooks.append(importlib.machinery.FileFinder.path_hook(loader)) - for result in bench(name, lambda: sys.modules.pop(name), repeat=repeat, - seconds=seconds): - yield result - finally: - sys.dont_write_bytecode = False - - -def _wo_bytecode(module): - name = module.__name__ - def benchmark_wo_bytecode(seconds, repeat): - """Source w/o bytecode: {}""" - bytecode_path = imp.cache_from_source(module.__file__) - if os.path.exists(bytecode_path): - os.unlink(bytecode_path) - sys.dont_write_bytecode = True - try: - for result in bench(name, lambda: sys.modules.pop(name), - repeat=repeat, seconds=seconds): - yield result - finally: - sys.dont_write_bytecode = False - - benchmark_wo_bytecode.__doc__ = benchmark_wo_bytecode.__doc__.format(name) - return benchmark_wo_bytecode - -tabnanny_wo_bytecode = _wo_bytecode(tabnanny) -decimal_wo_bytecode = _wo_bytecode(decimal) - - -def source_writing_bytecode(seconds, repeat): - """Source writing bytecode: small""" - assert not sys.dont_write_bytecode - name = '__importlib_test_benchmark__' - with source_util.create_modules(name) as mapping: - sys.meta_path.append(importlib.machinery.PathFinder) - loader = (importlib.machinery.SourceFileLoader, - importlib.machinery.SOURCE_SUFFIXES, True) - sys.path_hooks.append(importlib.machinery.FileFinder.path_hook(loader)) - def cleanup(): - sys.modules.pop(name) - os.unlink(imp.cache_from_source(mapping[name])) - for result in bench(name, cleanup, repeat=repeat, seconds=seconds): - assert not os.path.exists(imp.cache_from_source(mapping[name])) - yield result - - -def _writing_bytecode(module): - name = module.__name__ - def writing_bytecode_benchmark(seconds, repeat): - """Source writing bytecode: {}""" - assert not sys.dont_write_bytecode - def cleanup(): - sys.modules.pop(name) - os.unlink(imp.cache_from_source(module.__file__)) - for result in bench(name, cleanup, repeat=repeat, seconds=seconds): - yield result - - writing_bytecode_benchmark.__doc__ = ( - writing_bytecode_benchmark.__doc__.format(name)) - return writing_bytecode_benchmark - -tabnanny_writing_bytecode = _writing_bytecode(tabnanny) -decimal_writing_bytecode = _writing_bytecode(decimal) - - -def source_using_bytecode(seconds, repeat): - """Source w/ bytecode: small""" - name = '__importlib_test_benchmark__' - with source_util.create_modules(name) as mapping: - sys.meta_path.append(importlib.machinery.PathFinder) - loader = (importlib.machinery.SourceFileLoader, - importlib.machinery.SOURCE_SUFFIXES, True) - sys.path_hooks.append(importlib.machinery.FileFinder.path_hook(loader)) - py_compile.compile(mapping[name]) - assert os.path.exists(imp.cache_from_source(mapping[name])) - for result in bench(name, lambda: sys.modules.pop(name), repeat=repeat, - seconds=seconds): - yield result - - -def _using_bytecode(module): - name = module.__name__ - def using_bytecode_benchmark(seconds, repeat): - """Source w/ bytecode: {}""" - py_compile.compile(module.__file__) - for result in bench(name, lambda: sys.modules.pop(name), repeat=repeat, - seconds=seconds): - yield result - - using_bytecode_benchmark.__doc__ = ( - using_bytecode_benchmark.__doc__.format(name)) - return using_bytecode_benchmark - -tabnanny_using_bytecode = _using_bytecode(tabnanny) -decimal_using_bytecode = _using_bytecode(decimal) - - -def main(import_, options): - if options.source_file: - with options.source_file: - prev_results = json.load(options.source_file) - else: - prev_results = {} - __builtins__.__import__ = import_ - benchmarks = (from_cache, builtin_mod, - source_writing_bytecode, - source_wo_bytecode, source_using_bytecode, - tabnanny_writing_bytecode, - tabnanny_wo_bytecode, tabnanny_using_bytecode, - decimal_writing_bytecode, - decimal_wo_bytecode, decimal_using_bytecode, - ) - if options.benchmark: - for b in benchmarks: - if b.__doc__ == options.benchmark: - benchmarks = [b] - break - else: - print('Unknown benchmark: {!r}'.format(options.benchmark, - file=sys.stderr)) - sys.exit(1) - seconds = 1 - seconds_plural = 's' if seconds > 1 else '' - repeat = 3 - header = ('Measuring imports/second over {} second{}, best out of {}\n' - 'Entire benchmark run should take about {} seconds\n' - 'Using {!r} as __import__\n') - print(header.format(seconds, seconds_plural, repeat, - len(benchmarks) * seconds * repeat, __import__)) - new_results = {} - for benchmark in benchmarks: - print(benchmark.__doc__, "[", end=' ') - sys.stdout.flush() - results = [] - for result in benchmark(seconds=seconds, repeat=repeat): - results.append(result) - print(result, end=' ') - sys.stdout.flush() - assert not sys.dont_write_bytecode - print("]", "best is", format(max(results), ',d')) - new_results[benchmark.__doc__] = results - if prev_results: - print('\n\nComparing new vs. old\n') - for benchmark in benchmarks: - benchmark_name = benchmark.__doc__ - old_result = max(prev_results[benchmark_name]) - new_result = max(new_results[benchmark_name]) - result = '{:,d} vs. {:,d} ({:%})'.format(new_result, - old_result, - new_result/old_result) - print(benchmark_name, ':', result) - if options.dest_file: - with options.dest_file: - json.dump(new_results, options.dest_file, indent=2) - - -if __name__ == '__main__': - import argparse - - parser = argparse.ArgumentParser() - parser.add_argument('-b', '--builtin', dest='builtin', action='store_true', - default=False, help="use the built-in __import__") - parser.add_argument('-r', '--read', dest='source_file', - type=argparse.FileType('r'), - help='file to read benchmark data from to compare ' - 'against') - parser.add_argument('-w', '--write', dest='dest_file', - type=argparse.FileType('w'), - help='file to write benchmark data to') - parser.add_argument('--benchmark', dest='benchmark', - help='specific benchmark to run') - options = parser.parse_args() - import_ = __import__ - if not options.builtin: - import_ = importlib.__import__ - - main(import_, options) |