Online PHP editor | refs for EVKLI

<?php /* TESTING: http://programmers.stackexchange.com/questions/120378/is-error-suppression-acceptable-in-role-of-logic-mechanism/120386#120386 Elapsed Time[µseconds] Check, Exists : 50000 - Check, Exists : 94718 (user), 342 (system) EACH - Check, Exists : 1.89436E-6 (user), 6.84E-9 (system) Suppress, Exists : 50000 - Suppress, Exists : 146815 (user), 170 (system) EACH - Suppress, Exists : 2.9363E-6 (user), 3.4E-9 (system) Check, Missing : 50000 - Check, Missing : 84252 (user), 82 (system) EACH - Check, Missing : 1.68504E-6 (user), 1.64E-9 (system) Suppress, Missing: 50000 - Suppress, Missing: 200548 (user), 297 (system) EACH - Suppress, Missing: 4.01096E-6 (user), 5.94E-9 (system) Exists : 1.6 times slower (user), 0.5 (system) times slower. Missing: 2.4 times slower (user), 3.6 (system) times slower. */ define( 'TIMES', 50000 ); $results = array(); $messages = array( 'Check, Exists ', 'Suppress, Exists ', 'Check, Missing ', 'Suppress, Missing', ); $results[] = run_test( 'test_error_check', array('key'=>'foo','foo'=>'bar' ) ); $results[] = run_test( 'test_error_suppress', array('key'=>'foo','foo'=>'bar' ) ); $results[] = run_test( 'test_error_check', array('key'=>'foo' ) ); $results[] = run_test( 'test_error_suppress', array('key'=>'foo' ) ); $times = TIMES; $denominator = pow(10,6)*TIMES; echo "Elapsed Time[µseconds]"; foreach( $results as $index => $result ) { echo "\n{$messages[$index]}:"; echo "\n\t{$times} - {$messages[$index]}: {$result[0]} (user), {$result[1]} (system)"; $result[0] /= $denominator; $result[1] /= $denominator; echo "\n\tEACH - {$messages[$index]}: {$result[0]} (user), {$result[1]} (system)"; } echo "\n"; $messages = array( 'Exists ', 'Missing', ); for($i=0; $i<2; $i++) { $j = $i*2; $uratio = round($results[$j+1][0]/$results[$j][0],1); $sratio = round($results[$j+1][1]/$results[$j][1],1); echo "\n{$messages[$i]}: {$uratio} times slower (user), {$sratio} (system) times slower."; } echo "\n\n"; function test_error_suppress( $args, $key ) { return @$args[$key]; } function test_error_check( $args, $key ) { return ! empty( $args[$key] ) ? $args[$key] : false; } function run_test( $func_to_test, $args = array() ) { $dat = getrusage(); $utime_before = $dat["ru_utime.tv_sec"].$dat["ru_utime.tv_usec"]; $stime_before = $dat["ru_stime.tv_sec"].$dat["ru_stime.tv_usec"]; for( $i = 0; $i < TIMES; $i++ ) call_user_func( $func_to_test, $args, $args['key'] ); $dat = getrusage(); $utime_after = $dat["ru_utime.tv_sec"].$dat["ru_utime.tv_usec"]; $stime_after = $dat["ru_stime.tv_sec"].$dat["ru_stime.tv_usec"]; $utime_elapsed = ($utime_after - $utime_before); $stime_elapsed = ($stime_after - $stime_before); return array( $utime_elapsed, $stime_elapsed ); }