Test various key/value "array" type systems in PHP

gistfile1.aw

<?php
# Normal array
$startMemory = memory_get_usage();
$array = range( 1, 100000 );
echo ( ( memory_get_usage() - $startMemory ) / 100000 ), " bytes per element\n";
unset( $array, $startMemory );

# stdClass as a simple map/dictionary
$startMemory = memory_get_usage();
$array = new stdClass();
for ($i = 0; $i < 100000; ++$i) {
    $array->{$i} = $i;
}
echo ( ( memory_get_usage() - $startMemory ) / 100000 ), " bytes per element\n";
unset( $array, $startMemory );

#SplFixedArray
$startMemory = memory_get_usage();
$array = new SplFixedArray(100000);
for ($i = 0; $i < 100000; ++$i) {
    $array[$i] = $i;
}
echo ( ( memory_get_usage() - $startMemory ) / 100000 ), " bytes per element\n";
unset( $array, $startMemory );