guile/benchmark-suite/benchmarks/read.bm

;;; read.bm --- Exercise the reader.               -*- Scheme -*-
;;;
;;; Copyright (C) 2008 Free Software Foundation, Inc.
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2, or (at your option)
;;; any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with this software; see the file COPYING.  If not, write to
;;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;;; Boston, MA 02110-1301 USA

(define-module (benchmarks read)
  :use-module (benchmark-suite lib))


(define %files-to-load
  ;; Various large Scheme files.
  (map %search-load-path
       '("ice-9/boot-9.scm"  "ice-9/common-list.scm"
	 "ice-9/format.scm"  "ice-9/optargs.scm"
	 "ice-9/session.scm" "ice-9/getopt-long.scm"
         "ice-9/psyntax.pp")))

(define (load-file-with-reader file-name reader buffering)
  (with-input-from-file file-name
    (lambda ()
      (apply setvbuf (current-input-port) buffering)
      (let loop ((sexp (reader)))
        (if (eof-object? sexp)
            #t
	    (loop (reader)))))))

(define (exercise-read buffering)
  (for-each (lambda (file)
		      (load-file-with-reader file read buffering))
            %files-to-load))


(with-benchmark-prefix "read"

  (benchmark "_IONBF" 5  ;; this one is very slow
    (exercise-read (list _IONBF)))

  (benchmark "_IOLBF" 100
    (exercise-read (list _IOLBF)))

  (benchmark "_IOFBF 4096" 100
    (exercise-read (list _IOFBF 4096)))

  (benchmark "_IOFBF 8192" 100
    (exercise-read (list _IOFBF 8192)))

  (benchmark "_IOFBF 16384" 100
    (exercise-read (list _IOFBF 16384))))