Brainstorming a Drupal Drush Command to facilitate cache warming after site deployment. Rename to warm.drush.inc for actual use.

Drush Warm.php

<?php
/**
 * @file
 * Command definition for Drush Cache Warm.
 */

/**
 * Implements hook_drush_command().
 */
function warm_drush_command() {
  $items = array();
  
  $items['warm'] = array(
    'description' => 'Warm the caches so a first-time user after deploy has an lighter load.',
    'aliases' => array('cache-warm', 'cw'),
  );
  
  return $items;
}

/**
 * Command callback for 'warm'.
 */
function drush_warm() {
  $data = array('Site Frontpage Request Time' => warm_url('<front>'));
  $data = warm_invoke_all('warm_cache') + $data;
 
  if (drush_get_context('DRUSH_VERBOSE')) {
    $data['Total'] = array_reduce($data, function($result, $item) {
      return $result + $item;
    }) . 'ms';

    if (drush_get_option('pipe', FALSE)) {
      drush_print_pipe(_core_site_credential_list($data));
    }
    else {
      drush_print_table(drush_key_value_to_array_table($data));
    }
  }
  
  drush_log('Caches have been warmed.', 'success');
}

/**
 * Implements hook_drush_help_alter().
 */
function warm_drush_help_alter(&$command) {
  if ($command['command'] == 'cache-clear') {
    $command['options']['warm'] = 'Warm the cache on completion of cache-clear.';
  }
}

/**
 * Implements drush_hook_post_COMMAND() for 'cache-clear'.
 */
function drush_warm_post_cache_command_clear() {
  if (drush_get_option('warm', FALSE)) {
    drush_warm();
  }
}

/**
 * Retrieve the time it takes to get a page.
 */
function warm_url($path = '<front>') {
  $url = call_user_func_array('url', func_get_args());

  timer_start('warm-step');  
  drupal_http_request($url);
  $time = timer_read('warm-step');
  
  return $time . 'ms';
}

/**
 * Customized version of module_invoke_all().
 *
 * This function discards all returned data from hook implementations, instead
 * providing data on the run time of each implementation run-time.
 */
function warm_invoke_all($hook) {
  $args = func_get_args();
  // Remove $hook from the arguments.
  unset($args[0]);
  $return = array();
  foreach (module_implements($hook) as $module) {
    $function = $module . '_' . $hook;
    if (function_exists($function)) {
      timer_start('warm-step');
      call_user_func_array($function, $args);
      $time = timer_read('warm-step') . 'ms';
      $return[$function . '()'] = $time;
    }
  }

  return $return;
}

/// Implementations ///

/**
 * Implements hook_warm_cache().
 */
function views_warm_cache() {
  views_get_all_views();
}

/**
 * Implements hook_warm_cache().
 */
function content_warm_cache() {
  _content_type_info();
}