Benchmark::addFunction() - Code Metrics - Inspection of "Merge branch 'master' into develop" - alecrabbit/php-simple-profiler - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — develop ( 5a5dff...7e0445 )

by Alec

created 2019-03-05 09:12 UTC

Benchmark::addFunction() A

↳ Parent: Benchmark

Complexity

Conditions	2
Paths	2

Size

Total Lines	26
Code Lines	20

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	20
CRAP Score	2

Importance

Changes

Metric	Value
cc	2
eloc	20
nc	2
nop	2
dl	0
loc	26
ccs	20
cts	20
cp	1
crap	2
rs	9.6
c	0
b	0
f	0

<?php declare(strict_types=1);

namespace AlecRabbit\Tools;

use AlecRabbit\Accessories\MemoryUsage;
use AlecRabbit\Accessories\Rewindable;
use AlecRabbit\Tools\Contracts\BenchmarkInterface;
use AlecRabbit\Tools\Contracts\StringConstants;
use AlecRabbit\Tools\Internal\BenchmarkFunction;
use AlecRabbit\Tools\Reports\Contracts\ReportableInterface;
use AlecRabbit\Tools\Reports\Traits\Reportable;
use AlecRabbit\Tools\Traits\BenchmarkFields;
use function AlecRabbit\typeOf;

class Benchmark implements BenchmarkInterface, ReportableInterface, StringConstants
{
    use BenchmarkFields, Reportable;

    public const MIN_ITERATIONS = 100;
    public const DEFAULT_STEPS = 100;

    /** @var int */
    protected $advanceSteps = self::DEFAULT_STEPS;
    /** @var int */
    private $functionIndex = 1;
    /** @var Rewindable */
    private $rewindable;
    /** @var int */
    private $iterations;
    /** @var null|string */
    private $comment;
    /** @var string|null */
    private $humanReadableName;
    /** @var null|callable */
    private $onStart;
    /** @var int */
    private $totalIterations = 0;
    /** @var null|callable */
    private $onAdvance;
    /** @var null|callable */
    private $onFinish;
    /** @var int */
    private $advanceStep = 0;
    /** @var \Closure */
    private $generatorFunction;
    /** @var bool */
    private $showReturns = true;

    /**
     * Benchmark constructor.
     * @param int $iterations
     */
    public function __construct(?int $iterations = null)
    {
        $this->iterations = $this->refineIterations($iterations);

        $this->generatorFunction = function (int $iterations, int $i = 1): \Generator {
            while ($i <= $iterations) {
                yield $i++;
            }
        };

        $this->timer = new Timer();
        $this->initialize();
    }

    private function refineIterations(?int $iterations): int
    {
        $iterations = $iterations ?? self::MIN_ITERATIONS;
        if ($iterations < self::MIN_ITERATIONS) {
            throw new \RuntimeException(__CLASS__ . ': Iterations should greater then ' . self::MIN_ITERATIONS);
        }
        return $iterations;
    }

    /**
     * Resets Benchmark object clear
     */
    private function initialize(): void
    {
        unset($this->functions, $this->humanReadableName, $this->rewindable, $this->profiler, $this->memoryUsageReport);

        $this->humanReadableName = null;
        $this->rewindable =
            new Rewindable(
                $this->generatorFunction,
                $this->iterations
            );
        $this->functions = [];
        $this->profiler = new Profiler();
        $this->memoryUsageReport = MemoryUsage::report();
        $this->doneIterations = 0;
        $this->totalIterations = 0;
    }

    /**
     * Resets Benchmark object clear
     */
    public function reset(): void
    {
        $this->initialize();
    }

    /**
     * Launch benchmarking
     */
    public function run(): Benchmark
    {
        $this->launched = true;
        if ($this->onStart) {
            ($this->onStart)();
        }
        $this->execute();
        if ($this->onFinish) {
            ($this->onFinish)();
        }
        $this->doneIterationsCombined += $this->doneIterations;
        return $this;
    }

    /**
     * Benchmarking
     */
    private function execute(): void
    {
        /** @var  BenchmarkFunction $f */
        foreach ($this->functions as $f) {
            if (!$f->execute()) {
                $this->totalIterations -= $this->iterations;
                continue;
            }
            $this->advanceStep = (int)($this->totalIterations / $this->advanceSteps);
            $this->bench($f);
            $this->profiler->counter(self::BENCHMARKED)->bump();
        }
    }

    /**
     * @param BenchmarkFunction $f
     */
    private function bench(BenchmarkFunction $f): void
    {
        $timer = $f->getTimer();
        $function = $f->getCallable();
        $args = $f->getArgs();
        foreach ($this->rewindable as $iteration) {
            $start = microtime(true);
            /** @noinspection DisconnectedForeachInstructionInspection */
            $function(...$args);
            $stop = microtime(true);
            $timer->bounds($start, $stop, $iteration);
            /** @noinspection DisconnectedForeachInstructionInspection */
            $this->progress();
        }
    }

    private function progress(): void
    {
        $this->doneIterations++;
        if ($this->onAdvance && 0 === $this->doneIterations % $this->advanceStep) {
            ($this->onAdvance)();
        }
    }

    /**
     * @param callable|null $onStart
     * @param callable|null $onAdvance
     * @param callable|null $onFinish
     * @return Benchmark
     */
    public function showProgressBy(
        callable $onStart = null,
        callable $onAdvance = null,
        callable $onFinish = null
    ): Benchmark {
        $this->onStart = $onStart;
        $this->onAdvance = $onAdvance;
        $this->onFinish = $onFinish;
        return $this;
    }

    /**
     * @param mixed $func
     * @param mixed ...$args
     */
    public function addFunction($func, ...$args): void
    {
        if (!\is_callable($func, false, $name)) {
            throw new \InvalidArgumentException(
                sprintf(
                    '\'%s\' is NOT callable. Function must be callable. Type of "%s" provided instead.',
                    $name,
                    typeOf($func)
                )
            );
        }
        $function =
            new BenchmarkFunction(
                $func,
                $this->refineName($func, $name),
                $this->functionIndex++,
                $args,
                $this->comment,
                $this->humanReadableName
            );
        $function->setShowReturns($this->showReturns);
        $this->functions[$function->enumeratedName()] = $function;
        $this->humanReadableName = null;
        $this->comment = null;
        $this->profiler->counter(self::ADDED)->bump();
        $this->totalIterations += $this->iterations;
    }

    /**
     * @param callable $func
     * @param string $name
     * @return string
     */
    private function refineName($func, $name): string
    {
        if ($func instanceof \Closure) {
            $name = 'λ';
        }
        return $name;
    }

    /**
     * @param string $comment
     * @return Benchmark
     */
    public function withComment(string $comment): self
    {
        $this->comment = $comment;
        return $this;
    }

    /**
     * @param string $name
     * @return Benchmark
     */
    public function useName(string $name): self
    {
        $this->humanReadableName = $name;
        return $this;
    }

    /**
     * @return string
     */
    public function stat(): string
    {
        return
            sprintf(
                'Done in: %s%s%s',
                $this->getTimer()->elapsed(),
                PHP_EOL,
                (string)$this->memoryUsageReport
            );
    }

    public function noReturns()
    {
        $this->showReturns = false;
        /** @var $function BenchmarkFunction */
        if (!empty($this->functions)) {
            foreach ($this->functions as $function) {
                $function->setShowReturns(false);
            }
        }
        return $this;
    }

    /**
     * {@inheritdoc}
     */
    protected function prepareForReport(): void
    {
        $this->getProfiler()->report();
    }
}


1		<?php declare(strict_types=1);
2
3		namespace AlecRabbit\Tools;
4
5		use AlecRabbit\Accessories\MemoryUsage;
6		use AlecRabbit\Accessories\Rewindable;
7		use AlecRabbit\Tools\Contracts\BenchmarkInterface;
8		use AlecRabbit\Tools\Contracts\StringConstants;
9		use AlecRabbit\Tools\Internal\BenchmarkFunction;
10		use AlecRabbit\Tools\Reports\Contracts\ReportableInterface;
11		use AlecRabbit\Tools\Reports\Traits\Reportable;
12		use AlecRabbit\Tools\Traits\BenchmarkFields;
13		use function AlecRabbit\typeOf;
14
15		class Benchmark implements BenchmarkInterface, ReportableInterface, StringConstants
16		{
17		use BenchmarkFields, Reportable;
18
19		public const MIN_ITERATIONS = 100;
20		public const DEFAULT_STEPS = 100;
21
22		/** @var int */
23		protected $advanceSteps = self::DEFAULT_STEPS;
24		/** @var int */
25		private $functionIndex = 1;
26		/** @var Rewindable */
27		private $rewindable;
28		/** @var int */
29		private $iterations;
30		/** @var null\|string */
31		private $comment;
32		/** @var string\|null */
33		private $humanReadableName;
34		/** @var null\|callable */
35		private $onStart;
36		/** @var int */
37		private $totalIterations = 0;
38		/** @var null\|callable */
39		private $onAdvance;
40		/** @var null\|callable */
41		private $onFinish;
42		/** @var int */
43		private $advanceStep = 0;
44		/** @var \Closure */
45		private $generatorFunction;
46		/** @var bool */
47		private $showReturns = true;
48
49		/**
50		* Benchmark constructor.
51		* @param int $iterations
52		*/
53	9	public function __construct(?int $iterations = null)
54		{
55	9	$this->iterations = $this->refineIterations($iterations);
56
57		$this->generatorFunction = function (int $iterations, int $i = 1): \Generator {
58	6	while ($i <= $iterations) {
59	6	yield $i++;
60		}
61	6	};
62
63	9	$this->timer = new Timer();
64	9	$this->initialize();
65	9	}
66
67	9	private function refineIterations(?int $iterations): int
68		{
69	9	$iterations = $iterations ?? self::MIN_ITERATIONS;
70	9	if ($iterations < self::MIN_ITERATIONS) {
71	1	throw new \RuntimeException(__CLASS__ . ': Iterations should greater then ' . self::MIN_ITERATIONS);
72		}
73	9	return $iterations;
74		}
75
76		/**
77		* Resets Benchmark object clear
78		*/
79	9	private function initialize(): void
80		{
81	9	unset($this->functions, $this->humanReadableName, $this->rewindable, $this->profiler, $this->memoryUsageReport);
82
83	9	$this->humanReadableName = null;
84	9	$this->rewindable =
85	9	new Rewindable(
86	9	$this->generatorFunction,
87	9	$this->iterations
88		);
89	9	$this->functions = [];
90	9	$this->profiler = new Profiler();
91	9	$this->memoryUsageReport = MemoryUsage::report();
92	9	$this->doneIterations = 0;
93	9	$this->totalIterations = 0;
94	9	}
95
96		/**
97		* Resets Benchmark object clear
98		*/
99	1	public function reset(): void
100		{
101	1	$this->initialize();
102	1	}
103
104		/**
105		* Launch benchmarking
106		*/
107	7	public function run(): Benchmark
108		{
109	7	$this->launched = true;
110	7	if ($this->onStart) {
111	3	($this->onStart)();
112		}
113	7	$this->execute();
114	7	if ($this->onFinish) {
115	4	($this->onFinish)();
116		}
117	7	$this->doneIterationsCombined += $this->doneIterations;
118	7	return $this;
119		}
120
121		/**
122		* Benchmarking
123		*/
124	7	private function execute(): void
125		{
126		/** @var BenchmarkFunction $f */
127	7	foreach ($this->functions as $f) {
128	6	if (!$f->execute()) {
129	3	$this->totalIterations -= $this->iterations;
130	3	continue;
131		}
132	6	$this->advanceStep = (int)($this->totalIterations / $this->advanceSteps);
133	6	$this->bench($f);
134	6	$this->profiler->counter(self::BENCHMARKED)->bump();
135		}
136	7	}
137
138		/**
139		* @param BenchmarkFunction $f
140		*/
141	6	private function bench(BenchmarkFunction $f): void
142		{
143	6	$timer = $f->getTimer();
144	6	$function = $f->getCallable();
145	6	$args = $f->getArgs();
146	6	foreach ($this->rewindable as $iteration) {
147	6	$start = microtime(true);
148		/** @noinspection DisconnectedForeachInstructionInspection */
149	6	$function(...$args);
150	6	$stop = microtime(true);
151	6	$timer->bounds($start, $stop, $iteration);
152		/** @noinspection DisconnectedForeachInstructionInspection */
153	6	$this->progress();
154		}
155	6	}
156
157	6	private function progress(): void
158		{
159	6	$this->doneIterations++;
160	6	if ($this->onAdvance && 0 === $this->doneIterations % $this->advanceStep) {
161	4	($this->onAdvance)();
162		}
163	6	}
164
165		/**
166		* @param callable\|null $onStart
167		* @param callable\|null $onAdvance
168		* @param callable\|null $onFinish
169		* @return Benchmark
170		*/
171	4	public function showProgressBy(
172		callable $onStart = null,
173		callable $onAdvance = null,
174		callable $onFinish = null
175		): Benchmark {
176	4	$this->onStart = $onStart;
177	4	$this->onAdvance = $onAdvance;
178	4	$this->onFinish = $onFinish;
179	4	return $this;
180		}
181
182		/**
183		* @param mixed $func
184		* @param mixed ...$args
185		*/
186	7	public function addFunction($func, ...$args): void
187		{
188	7	if (!\is_callable($func, false, $name)) {
189	1	throw new \InvalidArgumentException(
190	1	sprintf(
191	1	'\'%s\' is NOT callable. Function must be callable. Type of "%s" provided instead.',
192	1	$name,
193	1	typeOf($func)
194		)
195		);
196		}
197		$function =
198	6	new BenchmarkFunction(
199	6	$func,
200	6	$this->refineName($func, $name),
201	6	$this->functionIndex++,
202	6	$args,
203	6	$this->comment,
204	6	$this->humanReadableName
205		);
206	6	$function->setShowReturns($this->showReturns);
207	6	$this->functions[$function->enumeratedName()] = $function;
208	6	$this->humanReadableName = null;
209	6	$this->comment = null;
210	6	$this->profiler->counter(self::ADDED)->bump();
211	6	$this->totalIterations += $this->iterations;
212	6	}
213
214		/**
215		* @param callable $func
216		* @param string $name
217		* @return string
218		*/
219	6	private function refineName($func, $name): string
220		{
221	6	if ($func instanceof \Closure) {
222	6	$name = 'λ';
223		}
224	6	return $name;
225		}
226
227		/**
228		* @param string $comment
229		* @return Benchmark
230		*/
231	4	public function withComment(string $comment): self
232		{
233	4	$this->comment = $comment;
234	4	return $this;
235		}
236
237		/**
238		* @param string $name
239		* @return Benchmark
240		*/
241	3	public function useName(string $name): self
242		{
243	3	$this->humanReadableName = $name;
244	3	return $this;
245		}
246
247		/**
248		* @return string
249		*/
250	3	public function stat(): string
251		{
252		return
253	3	sprintf(
254	3	'Done in: %s%s%s',
255	3	$this->getTimer()->elapsed(),
256	3	PHP_EOL,
257	3	(string)$this->memoryUsageReport
258		);
259		}
260
261		public function noReturns()
262		{
263		$this->showReturns = false;
264		/** @var $function BenchmarkFunction */
265		if (!empty($this->functions)) {
266		foreach ($this->functions as $function) {
267		$function->setShowReturns(false);
268		}
269		}
270		return $this;
271		}
272
273		/**
274		* {@inheritdoc}
275		*/
276	5	protected function prepareForReport(): void
277		{
278	5	$this->getProfiler()->report();
279	5	}
280		}
281

alecrabbit / php-simple-profiler

Push — develop ( 5a5dff...7e0445 )

Benchmark::addFunction() A

Complexity

Size

Duplication

Code Coverage

Importance

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