I just noticed this today.

For the longest time I couldn't figure out why my command line scripts are running so slow. Doing a full Drupal bootstrap can take 20-30 seconds. Today, somewhat randomly, I disabled cacherouter and now bootstrap takes <1.

I have no clue why this is happening.

I'm running Ubuntu 9.04 w/ apc installed through pecl. APC is enabled in both /etc/php5/apache2/php.ini and /etc/php5/cli/php.ini and both have 150mb alloted.