guile/benchmark-suite/benchmarks/ports.bm

;;; ports.bm --- Port I/O.         -*- mode: scheme; coding: utf-8; -*-
;;;
;;; Copyright (C) 2010, 2011 Free Software Foundation, Inc.
;;;
;;; This program is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Lesser General Public License
;;; as published by the Free Software Foundation; either version 3, 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 Lesser General Public License for more details.
;;;
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with this software; see the file COPYING.LESSER.  If
;;; not, write to the Free Software Foundation, Inc., 51 Franklin
;;; Street, Fifth Floor, Boston, MA 02110-1301 USA

(define-module (benchmarks ports)
  #:use-module (ice-9 rdelim)
  #:use-module (benchmark-suite lib))

(define %latin1-port
  (with-fluids ((%default-port-encoding #f))
    (open-input-string "hello, world")))

(define %utf8/ascii-port
  (with-fluids ((%default-port-encoding "UTF-8"))
    (open-input-string "hello, world")))

(define %utf8/wide-port
  (with-fluids ((%default-port-encoding "UTF-8"))
    (open-input-string "안녕하세요")))


(with-benchmark-prefix "peek-char"

  (benchmark "latin-1 port" 700000
    (peek-char %latin1-port))

  (benchmark "utf-8 port, ascii character" 700000
    (peek-char %utf8/ascii-port))

  (benchmark "utf-8 port, Korean character" 700000
    (peek-char %utf8/wide-port)))

(with-benchmark-prefix "read-char"

  (benchmark "latin-1 port" 10000000
    (read-char %latin1-port))

  (benchmark "utf-8 port, ascii character" 10000000
    (read-char %utf8/ascii-port))

  (benchmark "utf-8 port, Korean character" 10000000
    (read-char %utf8/wide-port)))

(with-benchmark-prefix "char-ready?"

  (benchmark "latin-1 port" 10000000
    (char-ready? %latin1-port))

  (benchmark "utf-8 port, ascii character" 10000000
    (char-ready? %utf8/ascii-port))

  (benchmark "utf-8 port, Korean character" 10000000
    (char-ready? %utf8/wide-port)))


(with-benchmark-prefix "rdelim"

  (let-syntax ((sequence (lambda (s)
                           ;; Create a sequence `(begin EXPR ...)' with
                           ;; COUNT occurrences of EXPR.
                           (syntax-case s ()
                             ((_ expr count)
                              (number? (syntax->datum #'count))
                              (cons #'begin
                                    (make-list
                                     (syntax->datum #'count)
                                     #'expr)))))))
    (let ((str (string-concatenate
                (make-list 1000 "one line\n"))))
      (benchmark "read-line" 1000
        (let ((port (with-fluids ((%default-port-encoding "UTF-8"))
                      (open-input-string str))))
          (sequence (read-line port) 1000))))))