BenchmarkSession.prepare_benchmarks() - Code Metrics - Inspection of "Percentile Support" - ionelmc/pytest-benchmark - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#93)

unknown

created 2017-11-08 17:49 UTC

BenchmarkSession.prepare_benchmarks() D

↳ Parent: BenchmarkSession

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	8
dl	0
loc	27
rs	4
c	0
b	0
f	0

from __future__ import division
from __future__ import print_function

import pytest

from .fixture import statistics
from .fixture import statistics_error
from .logger import Logger
from .table import TableResults
from .utils import NAME_FORMATTERS
from .utils import SecondsDecimal
from .utils import cached_property
from .utils import first_or_value
from .utils import get_machine_id
from .utils import load_storage
from .utils import load_timer
from .utils import safe_dumps
from .utils import short_filename


class PerformanceRegression(pytest.UsageError):
    pass


class BenchmarkSession(object):
    compared_mapping = None
    groups = None

    def __init__(self, config):
        self.verbose = config.getoption("benchmark_verbose")
        self.logger = Logger(self.verbose, config)
        self.config = config
        self.performance_regressions = []
        self.benchmarks = []
        self.machine_id = get_machine_id()
        self.storage = load_storage(
            config.getoption("benchmark_storage"),
            logger=self.logger,
            default_machine_id=self.machine_id,
            netrc=config.getoption("benchmark_netrc")
        )
        self.options = dict(
            min_time=SecondsDecimal(config.getoption("benchmark_min_time")),
            min_rounds=config.getoption("benchmark_min_rounds"),
            max_time=SecondsDecimal(config.getoption("benchmark_max_time")),
            timer=load_timer(config.getoption("benchmark_timer")),
            calibration_precision=config.getoption("benchmark_calibration_precision"),
            disable_gc=config.getoption("benchmark_disable_gc"),
            warmup=config.getoption("benchmark_warmup"),
            warmup_iterations=config.getoption("benchmark_warmup_iterations"),
            use_cprofile=bool(config.getoption("benchmark_cprofile")),
        )
        self.skip = config.getoption("benchmark_skip")
        self.disabled = config.getoption("benchmark_disable") and not config.getoption("benchmark_enable")
        self.cprofile_sort_by = config.getoption("benchmark_cprofile")

        if config.getoption("dist", "no") != "no" and not self.skip:
            self.logger.warn(
                "BENCHMARK-U2",
                "Benchmarks are automatically disabled because xdist plugin is active."
                "Benchmarks cannot be performed reliably in a parallelized environment.",
                fslocation="::"
            )
            self.disabled = True
        if hasattr(config, "slaveinput"):
            self.disabled = True
        if not statistics:
            self.logger.warn(
                "BENCHMARK-U3",
                "Benchmarks are automatically disabled because we could not import `statistics`\n\n%s" %
                statistics_error,
                fslocation="::"
            )
            self.disabled = True

        self.only = config.getoption("benchmark_only")
        self.sort = config.getoption("benchmark_sort")
        self.columns = config.getoption("benchmark_columns")
        if self.skip and self.only:
            raise pytest.UsageError("Can't have both --benchmark-only and --benchmark-skip options.")
        if self.disabled and self.only:
            raise pytest.UsageError(
                "Can't have both --benchmark-only and --benchmark-disable options. Note that --benchmark-disable is "
                "automatically activated if xdist is on or you're missing the statistics dependency.")
        self.group_by = config.getoption("benchmark_group_by")
        self.save = config.getoption("benchmark_save")
        self.autosave = config.getoption("benchmark_autosave")
        self.save_data = config.getoption("benchmark_save_data")
        self.json = config.getoption("benchmark_json")
        self.compare = config.getoption("benchmark_compare")
        self.compare_fail = config.getoption("benchmark_compare_fail")
        self.name_format = NAME_FORMATTERS[config.getoption("benchmark_name")]

        self.histogram = first_or_value(config.getoption("benchmark_histogram"), False)

    @cached_property
    def machine_info(self):
        obj = self.config.hook.pytest_benchmark_generate_machine_info(config=self.config)
        self.config.hook.pytest_benchmark_update_machine_info(
            config=self.config,
            machine_info=obj
        )
        return obj

    def prepare_benchmarks(self):
        for bench in self.benchmarks:
            if bench:
                compared = False
                for path, compared_mapping in self.compared_mapping.items():
                    if bench.fullname in compared_mapping:
                        compared = compared_mapping[bench.fullname]
                        source = short_filename(path, self.machine_id)
                        flat_bench = bench.as_dict(include_data=False, stats=False, cprofile=self.cprofile_sort_by)
                        flat_bench.update(compared["stats"])
                        flat_bench["path"] = str(path)
                        flat_bench["source"] = source
                        if self.compare_fail:
                            for check in self.compare_fail:
                                fail = check.fails(bench, flat_bench)
                                if fail:
                                    self.performance_regressions.append((self.name_format(flat_bench), fail))
                        yield flat_bench
                flat_bench = bench.as_dict(
                    include_data=False,
                    flat=True,
                    cprofile=self.cprofile_sort_by,
                    columns=self.columns
                )
                flat_bench["path"] = None
                flat_bench["source"] = compared and "NOW"
                yield flat_bench

    def save_json(self, output_json):
        with self.json as fh:
            fh.write(safe_dumps(output_json, ensure_ascii=True, indent=4).encode())
        self.logger.info("Wrote benchmark data in: %s" % self.json, purple=True)

    def handle_saving(self):

        save = self.save or self.autosave
        if save or self.json:
            if not self.benchmarks:
                self.logger.warn("BENCHMARK-U2", "Not saving anything, no benchmarks have been run!")
                return
            commit_info = self.config.hook.pytest_benchmark_generate_commit_info(config=self.config)
            self.config.hook.pytest_benchmark_update_commit_info(config=self.config, commit_info=commit_info)

        if self.json:
            output_json = self.config.hook.pytest_benchmark_generate_json(
                config=self.config,
                benchmarks=self.benchmarks,
                include_data=True,
                machine_info=self.machine_info,
                commit_info=commit_info,

            )
            self.config.hook.pytest_benchmark_update_json(
                config=self.config,
                benchmarks=self.benchmarks,
                output_json=output_json,
            )
            self.save_json(output_json)

        if save:
            output_json = self.config.hook.pytest_benchmark_generate_json(
                config=self.config,
                benchmarks=self.benchmarks,
                include_data=self.save_data,
                machine_info=self.machine_info,
                commit_info=commit_info,
            )
            self.config.hook.pytest_benchmark_update_json(
                config=self.config,
                benchmarks=self.benchmarks,
                output_json=output_json,
            )
            self.storage.save(output_json, save)

    def handle_loading(self):
        compared_mapping = {}
        if self.compare:
            if self.compare is True:
                compared_benchmarks = list(self.storage.load())[-1:]
            else:
                compared_benchmarks = list(self.storage.load(self.compare))

            if not compared_benchmarks:
                msg = "Can't compare. No benchmark files in %r" % str(self.storage)
                if self.compare is True:
                    msg += ". Can't load the previous benchmark."
                    code = "BENCHMARK-C2"
                else:
                    msg += " match %r." % self.compare
                    code = "BENCHMARK-C1"
                self.logger.warn(code, msg, fslocation=self.storage.location)

            for path, compared_benchmark in compared_benchmarks:
                self.config.hook.pytest_benchmark_compare_machine_info(
                    config=self.config,
                    benchmarksession=self,
                    machine_info=self.machine_info,
                    compared_benchmark=compared_benchmark,
                )
                compared_mapping[path] = dict(
                    (bench['fullname'], bench) for bench in compared_benchmark['benchmarks']
                )
                self.logger.info("Comparing against benchmarks from: %s" % path, newline=False)
        self.compared_mapping = compared_mapping

    def finish(self):
        self.handle_saving()
        prepared_benchmarks = list(self.prepare_benchmarks())
        if prepared_benchmarks:
            self.groups = self.config.hook.pytest_benchmark_group_stats(
                config=self.config,
                benchmarks=prepared_benchmarks,
                group_by=self.group_by
            )

    def display(self, tr):
        if not self.groups:
            return

        tr.ensure_newline()
        results_table = TableResults(
            columns=self.columns,
            sort=self.sort,
            histogram=self.histogram,
            name_format=self.name_format,
            logger=self.logger
        )
        results_table.display(tr, self.groups)
        self.check_regressions()
        self.display_cprofile(tr)

    def check_regressions(self):
        if self.compare_fail and not self.compared_mapping:
            raise pytest.UsageError("--benchmark-compare-fail requires valid --benchmark-compare.")

        if self.performance_regressions:
            self.logger.error("Performance has regressed:\n%s" % "\n".join(
                "\t%s - %s" % line for line in self.performance_regressions
            ))
            raise PerformanceRegression("Performance has regressed.")

    def display_cprofile(self, tr):
        if self.options["use_cprofile"]:
            tr.section("cProfile information")
            tr.write_line("Time in s")
            for group in self.groups:
                group_name, benchmarks = group
                for benchmark in benchmarks:
                    tr.write(benchmark["fullname"], yellow=True)
                    if benchmark["source"]:
                        tr.write_line(" ({})".format((benchmark["source"])))
                    else:
                        tr.write("\n")
                    tr.write_line("ncalls\ttottime\tpercall\tcumtime\tpercall\tfilename:lineno(function)")
                    for function_info in benchmark["cprofile"]:
                        line = ("{ncalls_recursion}\t{tottime:.{prec}f}\t{tottime_per:.{prec}f}\t{cumtime:.{prec}f}"
                                "\t{cumtime_per:.{prec}f}\t{function_name}").format(
                            prec=4, **function_info)
                        tr.write_line(line)
                    tr.write("\n")


1		from __future__ import division
2		from __future__ import print_function
3
4		import pytest
5
6		from .fixture import statistics
7		from .fixture import statistics_error
8		from .logger import Logger
9		from .table import TableResults
10		from .utils import NAME_FORMATTERS
11		from .utils import SecondsDecimal
12		from .utils import cached_property
13		from .utils import first_or_value
14		from .utils import get_machine_id
15		from .utils import load_storage
16		from .utils import load_timer
17		from .utils import safe_dumps
18		from .utils import short_filename
19
20
21		class PerformanceRegression(pytest.UsageError):
22		pass
23
24
25		class BenchmarkSession(object):
26		compared_mapping = None
27		groups = None
28
29		def __init__(self, config):
30		self.verbose = config.getoption("benchmark_verbose")
31		self.logger = Logger(self.verbose, config)
32		self.config = config
33		self.performance_regressions = []
34		self.benchmarks = []
35		self.machine_id = get_machine_id()
36		self.storage = load_storage(
37		config.getoption("benchmark_storage"),
38		logger=self.logger,
39		default_machine_id=self.machine_id,
40		netrc=config.getoption("benchmark_netrc")
41		)
42		self.options = dict(
43		min_time=SecondsDecimal(config.getoption("benchmark_min_time")),
44		min_rounds=config.getoption("benchmark_min_rounds"),
45		max_time=SecondsDecimal(config.getoption("benchmark_max_time")),
46		timer=load_timer(config.getoption("benchmark_timer")),
47		calibration_precision=config.getoption("benchmark_calibration_precision"),
48		disable_gc=config.getoption("benchmark_disable_gc"),
49		warmup=config.getoption("benchmark_warmup"),
50		warmup_iterations=config.getoption("benchmark_warmup_iterations"),
51		use_cprofile=bool(config.getoption("benchmark_cprofile")),
52		)
53		self.skip = config.getoption("benchmark_skip")
54		self.disabled = config.getoption("benchmark_disable") and not config.getoption("benchmark_enable")
55		self.cprofile_sort_by = config.getoption("benchmark_cprofile")
56
57		if config.getoption("dist", "no") != "no" and not self.skip:
58		self.logger.warn(
59		"BENCHMARK-U2",
60		"Benchmarks are automatically disabled because xdist plugin is active."
61		"Benchmarks cannot be performed reliably in a parallelized environment.",
62		fslocation="::"
63		)
64		self.disabled = True
65		if hasattr(config, "slaveinput"):
66		self.disabled = True
67		if not statistics:
68		self.logger.warn(
69		"BENCHMARK-U3",
70		"Benchmarks are automatically disabled because we could not import `statistics`\n\n%s" %
71		statistics_error,
72		fslocation="::"
73		)
74		self.disabled = True
75
76		self.only = config.getoption("benchmark_only")
77		self.sort = config.getoption("benchmark_sort")
78		self.columns = config.getoption("benchmark_columns")
79		if self.skip and self.only:
80		raise pytest.UsageError("Can't have both --benchmark-only and --benchmark-skip options.")
81		if self.disabled and self.only:
82		raise pytest.UsageError(
83		"Can't have both --benchmark-only and --benchmark-disable options. Note that --benchmark-disable is "
84		"automatically activated if xdist is on or you're missing the statistics dependency.")
85		self.group_by = config.getoption("benchmark_group_by")
86		self.save = config.getoption("benchmark_save")
87		self.autosave = config.getoption("benchmark_autosave")
88		self.save_data = config.getoption("benchmark_save_data")
89		self.json = config.getoption("benchmark_json")
90		self.compare = config.getoption("benchmark_compare")
91		self.compare_fail = config.getoption("benchmark_compare_fail")
92		self.name_format = NAME_FORMATTERS[config.getoption("benchmark_name")]
93
94		self.histogram = first_or_value(config.getoption("benchmark_histogram"), False)
95
96		@cached_property
97		def machine_info(self):
98		obj = self.config.hook.pytest_benchmark_generate_machine_info(config=self.config)
99		self.config.hook.pytest_benchmark_update_machine_info(
100		config=self.config,
101		machine_info=obj
102		)
103		return obj
104
105		def prepare_benchmarks(self):
106		for bench in self.benchmarks:
107		if bench:
108		compared = False
109		for path, compared_mapping in self.compared_mapping.items():
110		if bench.fullname in compared_mapping:
111		compared = compared_mapping[bench.fullname]
112		source = short_filename(path, self.machine_id)
113		flat_bench = bench.as_dict(include_data=False, stats=False, cprofile=self.cprofile_sort_by)
114		flat_bench.update(compared["stats"])
115		flat_bench["path"] = str(path)
116		flat_bench["source"] = source
117		if self.compare_fail:
118		for check in self.compare_fail:
119		fail = check.fails(bench, flat_bench)
120		if fail:
121		self.performance_regressions.append((self.name_format(flat_bench), fail))
122		yield flat_bench
123		flat_bench = bench.as_dict(
124		include_data=False,
125		flat=True,
126		cprofile=self.cprofile_sort_by,
127		columns=self.columns
128		)
129		flat_bench["path"] = None
130		flat_bench["source"] = compared and "NOW"
131		yield flat_bench
132
133		def save_json(self, output_json):
134		with self.json as fh:
135		fh.write(safe_dumps(output_json, ensure_ascii=True, indent=4).encode())
136		self.logger.info("Wrote benchmark data in: %s" % self.json, purple=True)
137
138	View Code Duplication	def handle_saving(self):
		0 ignored issues – show Duplication introduced 2017-11-08 17:49 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
139		save = self.save or self.autosave
140		if save or self.json:
141		if not self.benchmarks:
142		self.logger.warn("BENCHMARK-U2", "Not saving anything, no benchmarks have been run!")
143		return
144		commit_info = self.config.hook.pytest_benchmark_generate_commit_info(config=self.config)
145		self.config.hook.pytest_benchmark_update_commit_info(config=self.config, commit_info=commit_info)
146
147		if self.json:
148		output_json = self.config.hook.pytest_benchmark_generate_json(
149		config=self.config,
150		benchmarks=self.benchmarks,
151		include_data=True,
152		machine_info=self.machine_info,
153	View Code Duplication	commit_info=commit_info,
		0 ignored issues – show Duplication introduced 2017-11-08 17:49 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
154		)
155		self.config.hook.pytest_benchmark_update_json(
156		config=self.config,
157		benchmarks=self.benchmarks,
158		output_json=output_json,
159		)
160		self.save_json(output_json)
161
162		if save:
163		output_json = self.config.hook.pytest_benchmark_generate_json(
164		config=self.config,
165		benchmarks=self.benchmarks,
166		include_data=self.save_data,
167		machine_info=self.machine_info,
168		commit_info=commit_info,
169		)
170		self.config.hook.pytest_benchmark_update_json(
171		config=self.config,
172		benchmarks=self.benchmarks,
173		output_json=output_json,
174		)
175		self.storage.save(output_json, save)
176
177		def handle_loading(self):
178		compared_mapping = {}
179		if self.compare:
180		if self.compare is True:
181		compared_benchmarks = list(self.storage.load())[-1:]
182		else:
183		compared_benchmarks = list(self.storage.load(self.compare))
184
185		if not compared_benchmarks:
186		msg = "Can't compare. No benchmark files in %r" % str(self.storage)
187		if self.compare is True:
188		msg += ". Can't load the previous benchmark."
189		code = "BENCHMARK-C2"
190		else:
191		msg += " match %r." % self.compare
192		code = "BENCHMARK-C1"
193		self.logger.warn(code, msg, fslocation=self.storage.location)
194
195		for path, compared_benchmark in compared_benchmarks:
196		self.config.hook.pytest_benchmark_compare_machine_info(
197		config=self.config,
198		benchmarksession=self,
199		machine_info=self.machine_info,
200		compared_benchmark=compared_benchmark,
201		)
202		compared_mapping[path] = dict(
203		(bench['fullname'], bench) for bench in compared_benchmark['benchmarks']
204		)
205		self.logger.info("Comparing against benchmarks from: %s" % path, newline=False)
206		self.compared_mapping = compared_mapping
207
208		def finish(self):
209		self.handle_saving()
210		prepared_benchmarks = list(self.prepare_benchmarks())
211		if prepared_benchmarks:
212		self.groups = self.config.hook.pytest_benchmark_group_stats(
213		config=self.config,
214		benchmarks=prepared_benchmarks,
215		group_by=self.group_by
216		)
217
218		def display(self, tr):
219		if not self.groups:
220		return
221
222		tr.ensure_newline()
223		results_table = TableResults(
224		columns=self.columns,
225		sort=self.sort,
226		histogram=self.histogram,
227		name_format=self.name_format,
228		logger=self.logger
229		)
230		results_table.display(tr, self.groups)
231		self.check_regressions()
232		self.display_cprofile(tr)
233
234		def check_regressions(self):
235		if self.compare_fail and not self.compared_mapping:
236		raise pytest.UsageError("--benchmark-compare-fail requires valid --benchmark-compare.")
237
238		if self.performance_regressions:
239		self.logger.error("Performance has regressed:\n%s" % "\n".join(
240		"\t%s - %s" % line for line in self.performance_regressions
241		))
242		raise PerformanceRegression("Performance has regressed.")
243
244		def display_cprofile(self, tr):
245		if self.options["use_cprofile"]:
246		tr.section("cProfile information")
247		tr.write_line("Time in s")
248		for group in self.groups:
249		group_name, benchmarks = group
250		for benchmark in benchmarks:
251		tr.write(benchmark["fullname"], yellow=True)
252		if benchmark["source"]:
253		tr.write_line(" ({})".format((benchmark["source"])))
254		else:
255		tr.write("\n")
256		tr.write_line("ncalls\ttottime\tpercall\tcumtime\tpercall\tfilename:lineno(function)")
257		for function_info in benchmark["cprofile"]:
258		line = ("{ncalls_recursion}\t{tottime:.{prec}f}\t{tottime_per:.{prec}f}\t{cumtime:.{prec}f}"
259		"\t{cumtime_per:.{prec}f}\t{function_name}").format(
260		prec=4, **function_info)
261		tr.write_line(line)
262		tr.write("\n")
263

ionelmc / pytest-benchmark

Pull Request — master (#93)

BenchmarkSession.prepare_benchmarks() D

Complexity

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Duplication

Importance

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