diff --git a/lib/tree-updater.rkt b/lib/tree-updater.rkt
index 074c5a1..0dbf695 100644
--- a/lib/tree-updater.rkt
+++ b/lib/tree-updater.rkt
@@ -12,17 +12,12 @@
  update-tree-wiki)
 
 (define (preprocess-html-wiki html)
-  (define ((rr* find replace) contents)
-    (regexp-replace* find contents replace))
-  ((compose1
-    ; fix navbox list nesting
-    ; navbox on right of page has incorrect html "<td ...><li>" and the xexpr parser puts the <li> much further up the tree
-    ; add a <ul> to make the parser happy
-    ; usage: /fallout/wiki/Fallout:_New_Vegas_achievements_and_trophies
-    (rr* #rx"(<td[^>]*>\n?)(<li>)" "\\1<ul>\\2")
-    ; change <figcaption><p> to <figcaption><span> to make the parser happy
-    (rr* #rx"(<figcaption[^>]*>)[ \t]*<p class=\"caption\">([^<]*)</p>" "\\1<span class=\"caption\">\\2</span>"))
-   html))
+  (regexp-replace* #rx"(<(?:td|figcaption)[^>]*?>\n?)(?:<li>|[ \t]*?<p class=\"caption\">(.*?)</p>)"
+                   html (λ (whole first-tag [contents #f])
+                          (if (eq? (string-ref whole 1) #\f) ;; figcaption
+                              (string-append first-tag "<span class=\"caption\">" contents "</span>")
+                              (string-append first-tag "<ul><li>")))))
+
 (module+ test
   (check-equal? (preprocess-html-wiki "<td class=\"va-navbox-column\" style=\"width: 33%\">\n<li>Hey</li>")
                 "<td class=\"va-navbox-column\" style=\"width: 33%\">\n<ul><li>Hey</li>")
@@ -66,6 +61,11 @@
            (iframe (@ (src "https://example.com/iframe-src")))))))
 
 (define (updater wikiname #:strict-proxy? [strict-proxy? #f])
+  ;; precompute wikiurl regex for efficency
+  (define wikiurl-regex (pregexp (format "^https://(~a)\\.fandom\\.com(/wiki/.*)$" px-wikiname)))
+  ;; precompute link replacement string for efficiency
+  (define wiki-substitution (format "/~a\\1" wikiname))
+
   (define classlist-updater
     (compose1
      ; uncollapse all navbox items (bottom of page mass navigation)
@@ -110,8 +110,8 @@
      (curry attribute-maybe-update 'href
             (λ (href)
               ((compose1
-                (λ (href) (regexp-replace #rx"^(/wiki/.*)" href (format "/~a\\1" wikiname)))
-                (λ (href) (regexp-replace (pregexp (format "^https://(~a)\\.fandom\\.com(/wiki/.*)" px-wikiname)) href "/\\1\\2")))
+                (λ (href) (regexp-replace #rx"^(/wiki/.*)$" href wiki-substitution))
+                (λ (href) (regexp-replace wikiurl-regex href "/\\1\\2")))
                href)))
      ; add noreferrer to a.image
      (curry u
diff --git a/lib/xexpr-utils.rkt b/lib/xexpr-utils.rkt
index 018d8c3..cb40510 100644
--- a/lib/xexpr-utils.rkt
+++ b/lib/xexpr-utils.rkt
@@ -190,7 +190,9 @@
                 '(body "Hey" (& nbsp) (a (@ (href "/"))))))
 
 (define (has-class? name attributes)
-  (and (member name (string-split (or (get-attribute 'class attributes) "") " ")) #t))
+  ;; splitting without specifying separator or splitting on #px"\\s+" makes
+  ;; string-split use a faster whitespace-specialized implementation.
+  (and (member name (string-split (or (get-attribute 'class attributes) "") #px"\\s+")) #t))
 (module+ test
   (check-true (has-class? "red" '((class "yellow red blue"))))
   (check-false (has-class? "red" '((class "yellow blue"))))
diff --git a/src/extwiki-generic.rkt b/src/extwiki-generic.rkt
index fe30b14..113b139 100644
--- a/src/extwiki-generic.rkt
+++ b/src/extwiki-generic.rkt
@@ -110,8 +110,8 @@
                     (div (@ (class "niwa__left"))
                          (a (@ (class "niwa__go") (href ,go)) "Read " ,title " on " ,display-name " →")
                          ,@body
-                         (p "This wiki's core community has wholly migrated away from Fandom. You should "
-                            (a (@ (href ,go)) "go to " ,display-name " now!")))
+                         (p "This external wiki is a helpful alternative to Fandom. You should "
+                            (a (@ (href ,go)) "check it out now!")))
                     ,(if logo
                          `(div (@ (class "niwa__right"))
                                (img (@ (class "niwa__logo") (src ,logo))))