Re: problem with large arrays in php 4.3.2

Rodolfo Andrade wrote:

22k * 22 k = 484 millions... that's really a lot of data and should take a lot of time and processing power. I don't think it's really a bug.

Yeah, I guess not. I guess ~500,000 records/sec isn't so terrible. Is there a more efficient way to difference large sets of data?

Regards, Rodolfo Andrade ----- Original Message ----- From: Jesse Guardiani To: php-general@lists.php.net Sent: Tuesday, January 10, 2006 5:07 PM Subject: [PHP] problem with large arrays in php 4.3.2 Hello, I have an old version of php (4.3.2) that is acting rather strangely. I'm searching two large arrays (approx 22,000 records in each) using array_diff_key() from the PEAR PHP_Compat library:

        $result = $args[0];
        foreach ($args[0] as $key1 => $value1) {
            for ($i = 1; $i !== $array_count; $i++) {
                foreach ($args[$i] as $key2 => $value2) {
                    if ((string) $key1 === (string) $key2) {
                        unset($result[$key2]);
                        break 2;
                    }
                }
            }
        }

And I'm getting aweful performance. I know it's a ton of records (22,000 * 22,000), but it shouldn't take 16 minutes on a P4 Xeon 2.4ghz! Has anyone seen this before? Is this a bug? Or are my math skills lacking and this is perfectly normal performance for the size of the data set? Thanks!

-- Jesse Guardiani Programmer/Sys Admin jesse@wingnet.net