Online PHP editor | perf for dDrUO

<?php declare(strict_types=1); function myBcRound(string $numstr, int $precision = 2): string { if ($precision >= 0) { $addition = '0.' . str_repeat('0', $precision) . '5'; } else { throw new Exception('bcround with negative precision is not implemented.'); } return bcdiv(bcadd($numstr, $addition, $precision + 1), '1', $precision); } $testCases = [ ['source' => '123.0454000', 'scale' => 3, 'result' => '123.045'], ['source' => '123.0454499', 'scale' => 3, 'result' => '123.045'], ['source' => '123.0454500', 'scale' => 3, 'result' => '123.045'], ['source' => '123.0454900', 'scale' => 3, 'result' => '123.045'], ['source' => '123.0454999999999', 'scale' => 3, 'result' => '123.045'], ['source' => '123.045499999999999', 'scale' => 3, 'result' => '123.045'], ['source' => '123.045499999999999999999', 'scale' => 3, 'result' => '123.045'], ['source' => '123.0455000', 'scale' => 3, 'result' => '123.046'], ['source' => '123.0456000', 'scale' => 3, 'result' => '123.046'], ['source' => '123.0456789', 'scale' => 3, 'result' => '123.046'], [], ['source' => '123.454000', 'scale' => 2, 'result' => '123.45'], ['source' => '123.454499', 'scale' => 2, 'result' => '123.45'], ['source' => '123.454500', 'scale' => 2, 'result' => '123.45'], ['source' => '123.454900', 'scale' => 2, 'result' => '123.45'], ['source' => '123.454999999999', 'scale' => 2, 'result' => '123.45'],// round() ok ['source' => '123.45499999999999', 'scale' => 2, 'result' => '123.45'],// round() ok (in php84+, not ok < 84) ['source' => '123.45499999999999999999', 'scale' => 2, 'result' => '123.45'],// round() not ok ['source' => '123.455000', 'scale' => 2, 'result' => '123.46'], ['source' => '123.456000', 'scale' => 2, 'result' => '123.46'], ['source' => '123.456789', 'scale' => 2, 'result' => '123.46'], [], ['source' => '123.54000', 'scale' => 1, 'result' => '123.5'], ['source' => '123.54499', 'scale' => 1, 'result' => '123.5'], ['source' => '123.54500', 'scale' => 1, 'result' => '123.5'], ['source' => '123.54900', 'scale' => 1, 'result' => '123.5'], ['source' => '123.54999999999', 'scale' => 1, 'result' => '123.5'], ['source' => '123.5499999999999', 'scale' => 1, 'result' => '123.5'], ['source' => '123.5499999999999999999', 'scale' => 1, 'result' => '123.5'], ['source' => '123.55000', 'scale' => 1, 'result' => '123.6'], ['source' => '123.56000', 'scale' => 1, 'result' => '123.6'], ['source' => '123.56789', 'scale' => 1, 'result' => '123.6'], [], ['source' => '123.4000', 'scale' => 0, 'result' => '123'], ['source' => '123.4499', 'scale' => 0, 'result' => '123'], ['source' => '123.4500', 'scale' => 0, 'result' => '123'], ['source' => '123.4900', 'scale' => 0, 'result' => '123'], ['source' => '123.4999999999', 'scale' => 0, 'result' => '123'], ['source' => '123.499999999999', 'scale' => 0, 'result' => '123'], ['source' => '123.499999999999999999', 'scale' => 0, 'result' => '123'], ['source' => '123.5000', 'scale' => 0, 'result' => '124'], ['source' => '123.6000', 'scale' => 0, 'result' => '124'], ['source' => '123.6789', 'scale' => 0, 'result' => '124'], ]; foreach ($testCases as $testCase) { if (count($testCase) === 0) { echo "\n"; continue; } $source = $testCase['source']; $scale = $testCase['scale']; $result = $testCase['result']; echo str_pad($source, 25) . ' => '; $output = []; // new function myBcRound $roundedNumber1 = myBcRound($source, $scale); $output['myBcRound'] = $roundedNumber1 . ' ' . ($roundedNumber1 === $result ? ' OK' : 'FAIL'); // PHP8.4 bcround (only if you run on git.master branch on 3v4l.org or local PHP8.4 version) $roundedNumber2 = ''; if (version_compare(PHP_VERSION, '8.4', '>=')) { $roundedNumber2 = bcround($source, $scale); } $output['bcround'] = $roundedNumber2 . ' ' . ($roundedNumber2 === $result ? ' OK' : 'FAIL'); // round(float) $roundedNumber3 = (string) round((float) $source, $scale); $output['round'] = $roundedNumber3 . ' ' . ($roundedNumber3 === $result ? ' OK' : 'FAIL'); foreach ($output as $key => $value) { echo $key . ' = ' . str_pad($value, 7) . ' '; } echo "\n"; }

Version	System time (s)	User time (s)	Memory (MiB)
8.5.0	0.010	0.012	20.16
8.4.15	0.001	0.000	14.05
8.4.14	0.015	0.015	17.66
8.4.13	0.015	0.006	17.86
8.4.12	0.013	0.008	20.54
8.4.11	0.011	0.010	17.91
8.4.10	0.012	0.009	17.71
8.4.9	0.013	0.008	20.56
8.4.8	0.011	0.007	18.97
8.4.7	0.005	0.004	18.66
8.4.6	0.013	0.008	22.25
8.4.5	0.006	0.003	20.39
8.4.4	0.020	0.000	17.54
8.4.3	0.003	0.006	18.93
8.4.2	0.010	0.010	21.27
8.4.1	0.009	0.000	19.39
8.3.28	0.011	0.011	18.51
8.3.27	0.010	0.010	16.36
8.3.26	0.005	0.003	16.69
8.3.25	0.011	0.009	16.62
8.3.24	0.013	0.006	16.39
8.3.23	0.013	0.008	18.38
8.3.22	0.005	0.014	18.88
8.3.21	0.010	0.010	16.73
8.3.20	0.005	0.005	16.65
8.3.19	0.005	0.008	17.05
8.3.18	0.012	0.007	18.75
8.3.17	0.007	0.013	17.10
8.3.16	0.009	0.006	18.67
8.3.15	0.000	0.018	17.20
8.3.14	0.008	0.003	16.89
8.3.13	0.003	0.006	18.32
8.3.12	0.006	0.003	16.77
8.3.5	0.003	0.006	16.86
8.2.29	0.005	0.004	18.34
8.2.28	0.014	0.006	18.39
8.2.27	0.013	0.006	16.56
8.2.26	0.000	0.015	16.96
8.2.25	0.009	0.000	18.48
8.1.33	0.013	0.006	16.46
8.1.32	0.005	0.005	16.39
8.1.31	0.010	0.010	16.18