Time required for parsing a simple document (wc: 99621 298859 3267087).

;; CXML with NIL builder
;; (cxml:parse-file "~/test.xml" nil)

; cpu time (non-gc) 12,940 msec user, 20 msec system
; cpu time (gc)     0 msec user, 0 msec system
; cpu time (total)  12,940 msec user, 20 msec system
; real time  12,991 msec
; space allocation:
;  4,184,599 cons cells, 47,682,392 other bytes, 0 static bytes

;; CXML with xmls-compatible builder
;; (cxml:parse-file "~/test.xml" (cxml-xmls:make-xmls-builder))

; cpu time (non-gc) 14,370 msec user, 20 msec system
; cpu time (gc)     0 msec user, 0 msec system
; cpu time (total)  14,370 msec user, 20 msec system
; real time  14,387 msec
; space allocation:
;  8,667,564 cons cells, 47,682,600 other bytes, 0 static bytes

;; For comparison: xmls.lisp
;; (with-open-file (s "~/test.xml") (xmls:parse s :compress-whitespace nil))

; cpu time (non-gc) 27,440 msec user, 50 msec system
; cpu time (gc)     860 msec user, 0 msec system
; cpu time (total)  28,300 msec user, 50 msec system
; real time  28,813 msec
; space allocation:
;  14,821,161 cons cells, 243,886,592 other bytes, 0 static bytes

;; CXML with DOM builder
;; (cxml:parse-file "~/test.xml" (dom:make-dom-builder))

; cpu time (non-gc) 34,900 msec user, 40 msec system
; cpu time (gc)     760 msec user, 0 msec system
; cpu time (total)  35,660 msec user, 40 msec system
; real time  35,822 msec
; space allocation:
;  14,645,503 cons cells, 300,235,640 other bytes, 0 static bytes