Use asyncTimer for loadPages and loadPageMap (#17306)

Author: JasonEtco

lib/warm-server.js

@@ -7,8 +7,8 @@ const loadSiteTree = require('./site-tree')
 // Instrument these functions so that
 // it's wrapped in a timer that reports to Datadog
 const dog = {
-  loadPages: statsd.timer(loadPages, 'load_pages'),
-  loadPageMap: statsd.timer(loadPageMap, 'load_page_map'),
+  loadPages: statsd.asyncTimer(loadPages, 'load_pages'),
+  loadPageMap: statsd.asyncTimer(loadPageMap, 'load_page_map'),
   loadRedirects: statsd.timer(loadRedirects, 'load_redirects'),
   loadSiteData: statsd.timer(loadSiteData, 'load_site_data'),
   loadSiteTree: statsd.asyncTimer(loadSiteTree, 'load_site_tree')