ExportSiteTree.php

<?php
namespace SilverStripe\Com\Tasks;
use Psr\Log\LoggerInterface;
use SilverStripe\Core\Injector\Injector;
use SilverStripe\Dev\BuildTask;
use SilverStripe\Versioned\Versioned;
use SilverStripe\CMS\Model\SiteTree;

/**
 * export site tree for performance testing
 */
class ExportSiteTree extends BuildTask
{
    /**
     * Set a custom url segment (to follow dev/tasks/)
     *
     * @config
     * @var string
     */
    private static $segment = 'ExportSiteTree';

    public function run($request)
    {
        $livePages = Versioned::get_by_stage(SiteTree::class, Versioned::LIVE);
        foreach ($livePages as $page) {
            echo $page->Link().PHP_EOL;
        }
    }
}

speedtest.sh

#!/bin/bash
while IFS= read -r line; do
    ab -n 10 "$line";
done < "$1"