Online PHP editor | perf for 3prn4

@ 2024-04-29T13:40:56Z

<?php

class FiberPool
{
    /** @var Fiber[] */
    private array $fibers = [];
    private int $max = 10;
    private array $results = [];

    public function __construct(
        private \Generator $generator,
    ) {
    }

    public function wait(): void
    {
        while ($this->fibers || $this->generator->valid()) {
            // Fill up the pending fibers
            while (count($this->fibers) < $this->max && $this->generator->valid()) {
                $this->startNextItem();
            }

            foreach ($this->fibers as $key => $fiber) {
                // TBD: We could try/catch this and set the exception to the results array.
                if ($fiber->isSuspended()) {
                    $fiber->resume();
                } else if (!$fiber->isStarted()) {
                    $fiber->start();
                }

                if ($fiber->isTerminated()) {
                    $this->results[$key] = $fiber->getReturn();

                    unset($this->fibers[$key]);

                    $this->startNextItem();
                }
            }

            // If we're in a fiber loop ourselves then suspend up the chain once per loop.
            if (Fiber::getCurrent()) {
                Fiber::suspend();
            }
        }
    }

    public function getResults(): array
    {
        return $this->results;
    }

    private function startNextItem(): void
    {
        if ($this->generator->valid()) {
            $callable = $this->generator->current();
            $this->fibers[$this->generator->key()] = new Fiber($callable);

            $this->generator->next();
        }
    }
}

$consistentSuspend = function () {
    static $seed = [0, 0, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 0];

    return array_pop($seed);
};

$example = new FiberPool((function () use ($consistentSuspend) {
    $output = array_combine(range('A', 'Z'), range(1,26));
    foreach ($output as $key => $item) {
        echo 'generating ', $item, "\n";
        yield $key => function () use ($consistentSuspend, $item) {
            echo 'starting ', $item, "\n";
            while ($consistentSuspend()) {
                echo 'suspending ', $item, "\n";
                Fiber::suspend();
            }

            echo 'returning ', $item, "\n";
            return $item;
        };
    }
})());

$example->wait();

print_r($example->getResults());

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
8.4.12	0.005	0.006	20.48
8.4.11	0.015	0.008	22.47
8.4.10	0.010	0.009	18.00
8.4.9	0.012	0.010	17.93
8.4.8	0.013	0.009	17.80
8.4.7	0.008	0.005	17.80
8.4.6	0.006	0.004	20.58
8.4.5	0.017	0.006	17.90
8.4.4	0.018	0.004	18.83
8.4.3	0.007	0.017	20.64
8.4.2	0.010	0.013	20.71
8.4.1	0.003	0.006	19.75
8.3.25	0.014	0.007	18.73
8.3.24	0.012	0.007	16.79
8.3.23	0.012	0.008	16.88
8.3.22	0.016	0.005	16.94
8.3.21	0.010	0.010	17.04
8.3.20	0.006	0.004	16.79
8.3.19	0.012	0.007	18.99
8.3.18	0.011	0.009	16.89
8.3.17	0.006	0.013	20.61
8.3.16	0.013	0.007	17.28
8.3.15	0.004	0.004	17.36
8.3.14	0.017	0.003	18.66
8.3.13	0.003	0.007	18.37
8.3.12	0.007	0.014	20.83
8.3.11	0.014	0.007	20.94
8.3.10	0.006	0.003	18.29
8.3.9	0.010	0.007	26.77
8.3.8	0.003	0.007	17.97
8.3.7	0.020	0.003	18.43
8.3.6	0.014	0.011	25.92
8.3.5	0.012	0.012	25.92
8.3.4	0.050	0.000	25.92
8.3.3	0.036	0.014	25.92
8.3.2	0.038	0.008	25.92
8.3.1	0.034	0.008	25.92
8.3.0	0.052	0.000	25.92
8.2.29	0.013	0.007	20.32
8.2.28	0.006	0.003	22.25
8.2.27	0.012	0.009	17.13
8.2.26	0.003	0.016	16.65
8.2.25	0.008	0.000	18.72
8.2.24	0.004	0.007	17.41
8.2.23	0.002	0.005	22.58
8.2.22	0.023	0.000	24.06
8.2.21	0.014	0.007	26.77
8.2.20	0.010	0.000	16.63
8.2.19	0.010	0.007	16.75
8.2.18	0.031	0.009	25.92
8.2.17	0.032	0.006	25.92
8.2.16	0.036	0.010	25.92
8.2.15	0.045	0.007	25.92
8.2.14	0.059	0.004	25.92
8.2.13	0.033	0.015	25.92
8.2.12	0.033	0.013	25.92
8.2.11	0.043	0.003	25.92
8.2.10	0.037	0.011	25.92
8.2.9	0.040	0.011	25.92
8.2.8	0.040	0.012	25.92
8.2.7	0.041	0.003	25.92
8.2.6	0.029	0.021	25.92
8.2.5	0.036	0.013	25.92
8.2.4	0.029	0.018	25.92
8.2.3	0.028	0.012	25.92
8.2.2	0.039	0.007	25.92
8.2.1	0.036	0.006	25.92
8.2.0	0.043	0.004	25.92
8.1.33	0.008	0.002	18.54
8.1.32	0.013	0.008	16.27
8.1.31	0.000	0.009	16.64
8.1.30	0.010	0.010	20.07
8.1.29	0.010	0.000	30.84
8.1.28	0.045	0.007	25.92
8.1.27	0.048	0.003	25.92
8.1.26	0.037	0.009	25.92
8.1.25	0.041	0.009	25.92
8.1.24	0.035	0.010	25.92
8.1.23	0.029	0.015	25.92
8.1.22	0.033	0.012	25.92
8.1.21	0.037	0.017	25.92
8.1.20	0.031	0.011	25.92
8.1.19	0.045	0.006	25.92
8.1.18	0.055	0.008	25.92
8.1.17	0.044	0.004	25.92
8.1.16	0.035	0.012	25.92
8.1.15	0.042	0.003	25.92
8.1.14	0.031	0.015	25.92
8.1.13	0.030	0.015	25.92
8.1.12	0.036	0.011	25.92
8.1.11	0.035	0.010	25.92
8.1.10	0.035	0.010	25.92
8.1.9	0.032	0.013	25.92
8.1.8	0.028	0.012	25.92
8.1.7	0.032	0.009	25.92
8.1.6	0.029	0.016	25.92
8.1.5	0.039	0.010	25.92
8.1.4	0.040	0.009	25.92
8.1.3	0.033	0.011	25.92
8.1.2	0.038	0.010	25.92
8.1.1	0.047	0.013	25.92
8.1.0	0.031	0.009	25.92

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