Online PHP editor | perf for RYBmm

<?php namespace fiberEnabled { /** @return iterable<int> */ function fibonacciSequence(): iterable { $a = 0; $b = 1; while (true) { yield $a; // Imagine if this had to yield a Promise: // All callers would also have to return a promise and know how to wait for it to resolve if (\Fiber::getCurrent()) { \Fiber::suspend(); } $c = $a; $a = $b; $b += $c; } } function fetch5th(): int { foreach (fibonacciSequence() as $key => $i) { if ($key === 19) { return $i; } } } function fetchFirstTen(): array { $result = []; foreach (fibonacciSequence() as $key => $i) { $result[] = $i; if ($key === 9) { return $result; } } } function file_get_contents(string $file): string { if (!\Fiber::getCurrent()) { return \file_get_contents($file); } $stream = fopen($file, 'r'); \stream_set_blocking($stream, false); \stream_set_read_buffer($stream, 0); $data = ''; while (!\feof($stream)) { \Fiber::suspend(); $partial = \stream_get_contents($stream, length: 4); // Simulate read latency var_dump($partial); $data .= $partial; } \fclose($stream); return $data; } // NOTE: A real fiber event loop would be able to pool these and 'await' them alternatingly. // If it was waiting for a network request they may return in a different order. // Fibers can repeatedly suspend and let other fibers continue while waiting for an external condition. function fiberAll(array $fibers): array { foreach ($fibers as $key => $fiber) { if (!$fiber->isStarted()) { $fiber->start(); } while ($fiber->isSuspended()) { echo 'Fiber suspended, resuming...', "\n"; $fiber->resume(); } } return $fibers; } } namespace { file_put_contents('/tmp/test123', 'Some test text data'); // Whether used directly, outside of an event loop... print_r(\fiberEnabled\fetch5th()); echo "\n"; print_r(\fiberEnabled\fetchFirstTen()); print_r(\fiberEnabled\file_get_contents('/tmp/test123')); echo "\n"; // Or used as part of an event loop... $fibers = \fiberEnabled\fiberAll([ 'fetch5th' => new Fiber(\fiberEnabled\fetch5th(...)), 'fetchFirstTen' => new Fiber(\fiberEnabled\fetchFirstTen(...)), 'fileContent' => new Fiber(fn () => \fiberEnabled\file_get_contents('/tmp/test123')), ]); print_r($fibers['fetch5th']->getReturn()); echo "\n"; print_r($fibers['fetchFirstTen']->getReturn()); print_r($fibers['fileContent']->getReturn()); echo "\n"; }

Version	System time (s)	User time (s)	Memory (MiB)
8.4.13	0.006	0.003	18.87
8.4.12	0.013	0.007	19.91
8.4.11	0.013	0.008	18.03
8.4.10	0.011	0.011	18.01
8.4.9	0.012	0.007	20.58
8.4.8	0.010	0.010	19.07
8.4.7	0.010	0.011	20.42
8.4.6	0.011	0.012	20.78
8.4.5	0.012	0.008	18.66
8.4.4	0.004	0.004	17.73
8.4.3	0.042	0.007	17.49
8.4.2	0.039	0.011	17.54
8.4.1	0.046	0.003	17.73
8.3.26	0.009	0.011	16.70
8.3.25	0.014	0.006	16.75
8.3.24	0.014	0.006	16.77
8.3.23	0.012	0.010	16.99
8.3.22	0.005	0.004	19.32
8.3.21	0.007	0.002	16.99
8.3.20	0.006	0.004	16.65
8.3.19	0.008	0.008	17.10
8.3.18	0.003	0.006	19.01
8.3.17	0.003	0.016	17.20
8.3.16	0.037	0.011	16.55
8.3.15	0.035	0.012	16.55
8.3.14	0.036	0.010	16.62
8.3.13	0.034	0.006	16.45
8.3.12	0.031	0.009	16.68
8.3.11	0.029	0.010	16.56
8.3.10	0.035	0.011	16.49
8.3.9	0.037	0.005	16.51
8.3.8	0.034	0.014	16.67
8.3.7	0.038	0.007	16.51
8.3.6	0.033	0.011	16.77
8.3.5	0.036	0.014	16.75
8.3.4	0.038	0.009	17.55
8.3.3	0.030	0.008	17.53
8.3.2	0.032	0.007	17.59
8.3.1	0.030	0.007	17.61
8.3.0	0.025	0.008	17.67
8.2.29	0.015	0.007	16.96
8.2.28	0.011	0.009	20.30
8.2.27	0.030	0.009	16.76
8.2.26	0.034	0.004	16.49
8.2.25	0.033	0.005	16.56
8.2.24	0.029	0.009	16.73
8.2.23	0.029	0.009	16.43
8.2.22	0.027	0.014	16.60
8.2.21	0.029	0.010	16.49
8.2.20	0.028	0.010	16.72
8.2.19	0.024	0.009	16.46
8.2.18	0.017	0.009	16.68
8.2.17	0.029	0.008	17.82
8.2.16	0.047	0.005	17.72
8.2.15	0.031	0.013	17.60
8.2.14	0.036	0.005	17.74
8.2.13	0.038	0.002	17.71
8.2.12	0.036	0.005	17.65
8.2.11	0.041	0.004	17.55
8.2.10	0.035	0.007	17.57
8.2.9	0.033	0.006	17.77
8.2.8	0.027	0.011	17.64
8.2.7	0.034	0.003	17.51
8.2.6	0.031	0.008	17.46
8.2.5	0.035	0.007	17.65
8.2.4	0.041	0.004	17.63
8.2.3	0.035	0.004	17.40
8.2.2	0.032	0.005	17.51
8.2.1	0.037	0.002	17.43
8.2.0	0.026	0.011	17.37
8.1.32	0.011	0.009	16.50