Using Magento 2.1.7 EE and New Relic.

I've been monitoring the performance of a site which which is almost to the point of being unusable. If I break down the transactions by most time consuming, I'm left with these three:

 - /cms/noroute/index
 - /customer/section/load
 - /search/ajax/suggest

Sometimes the /customer/section/load takes precedent but I'm currently focused on the first entry in that list. I did a string search for cms/noroute/index and it returned a single file: vendor/magento/module-cms/etc/config.xml

The contents of which are this:

    <?xml version="1.0"?>
    <!--
    /**
     * Copyright © 2013-2017 Magento, Inc. All rights reserved.
     * See COPYING.txt for license details.
     */
    -->
    <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Store:etc/config.xsd">
        <default>
            <web>
                <default>
                    <cms_home_page>home</cms_home_page>
                    <cms_no_route>no-route</cms_no_route>
                    <cms_no_cookies>enable-cookies</cms_no_cookies>
                    <front>cms</front>
                    <no_route>cms/noroute/index</no_route>
                    <show_cms_breadcrumbs>1</show_cms_breadcrumbs>
                </default>
            </web>
            <cms>
                <wysiwyg>
                    <enabled>enabled</enabled>
                </wysiwyg>
            </cms>
            <system>
                <media_storage_configuration>
                    <allowed_resources>
                        <wysiwyg_image_folder>wysiwyg</wysiwyg_image_folder>
                    </allowed_resources>
                </media_storage_configuration>
            </system>
        </default>
    </config>

I'm not seeing much from this file that would indicate bad practice or performance hogging. Is there a better way to determine if I've got an event-driven issue with Magento or some other piece of functionality which would could be globally affecting performance even on CMS pages?