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@prolic
Created July 13, 2017 07:46
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functional programming benchmarks in PHP
<?php
namespace f;
use ReflectionFunction;
const curry = 'f\curry';
function curry(callable $f, ...$args)
{
return function (...$partialArgs) use ($f, $args) {
return (function ($args) use ($f) {
return count($args) < (new ReflectionFunction($f))->getNumberOfRequiredParameters()
? curry($f, ...$args)
: $f(...$args);
})(array_merge($args, $partialArgs));
};
}
function printTime(string $r, float $t, float $l) {
echo $r . PHP_EOL;
$e = $t - $l;
echo 'time: ' . ($t) . 's (without loop: ' . $e . 's, per 100 executions ' . ($e / 100) . 's)' . PHP_EOL . PHP_EOL;
}
function executeLoop(callable $f, ...$args): float {
$s = microtime(true);
for ($i = 0; $i < 1000000; $i++) {
echo $f(...$args);
}
$t = microtime(true) - $s;
return $t;
}
$simpleCall = function ($x) {
return $x + 1;
};
$wrappedCall = function ($x) {
return function () use ($x) {
return $x + 1;
};
};
$doubleWrappedCall = function ($x) {
return function () use ($x) {
return function () use ($x) {
return $x + 1;
};
};
};
$manyArgs = function ($x, $y, $z) {
return $x + $y + $z;
};
$manyArgsToOne = function ($x) {
return function ($y) use ($x) {
return function ($z) use ($x, $y) {
return $x + $y + $z;
};
};
};
$curried = curry(function ($x, $y, $z) {
return $x + $y + $z;
});
$l = executeLoop(function () {});
echo 'loop time: ' . $l . 's' . PHP_EOL . PHP_EOL;
$t = executeLoop(function ($x) use ($simpleCall) {
$simpleCall($x);
}, 1);
printTime('simpleCall', $t, $l);
$t = executeLoop(function ($x) use ($wrappedCall) {
$wrappedCall($x)();
}, 1);
printTime('wrappedCall', $t, $l);
$t = executeLoop(function ($x) use ($doubleWrappedCall) {
$doubleWrappedCall($x)()();
}, 1);
printTime('doubleWrappedCall', $t, $l);
$t = executeLoop(function ($x, $y, $z) use ($manyArgs) {
$manyArgs($x, $y, $z);
}, 1, 1, 1);
printTime('manyArgs', $t, $l);
$t = executeLoop(function ($x, $y, $z) use ($manyArgsToOne) {
$manyArgsToOne($x)($y)($z);
}, 1, 1, 1);
printTime('manyArgsToOne', $t, $l);
$t = executeLoop(function ($x, $y, $z) use ($curried) {
$curried($x)($y)($z);
}, 1, 1, 1);
printTime('curried', $t, $l);
// output:
loop time: 0.05836009979248s
simpleCall
time: 0.11742186546326s (without loop: 0.059061765670776s, per 100 executions 0.00059061765670776s)
wrappedCall
time: 0.44442796707153s (without loop: 0.38606786727905s, per 100 executions 0.0038606786727905s)
doubleWrappedCall
time: 0.72968101501465s (without loop: 0.67132091522217s, per 100 executions 0.0067132091522217s)
manyArgs
time: 0.15100598335266s (without loop: 0.092645883560181s, per 100 executions 0.00092645883560181s)
manyArgsToOne
time: 0.73799300193787s (without loop: 0.67963290214539s, per 100 executions 0.0067963290214539s)
curried
time: 3.7121551036835s (without loop: 3.653795003891s, per 100 executions 0.03653795003891s)
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