<?php function benchmarkMemory(callable $function, $args=null) { $memory = memory_get_peak_usage(); $result = is_array($args)? call_user_func_array($function, $args): call_user_func_array($function); return [ 'memory' => memory_get_peak_usage() - $memory ]; } var_dump(benchmarkMemory('str_repeat', ['test',1E4])); gc_collect_cycles(); var_dump(benchmarkMemory('str_repeat', ['test',1E3]));
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