benchmark-suite/benchmarks/hash.bm

   1 ;;; hash.bm --- Hash functions.                       -*- Scheme -*-
   2 ;;;
   3 ;;; Copyright (C) 2015 Free Software Foundation, Inc.
   4 ;;;
   5 ;;; This program is free software; you can redistribute it and/or
   6 ;;; modify it under the terms of the GNU Lesser General Public License
   7 ;;; as published by the Free Software Foundation; either version 3, or
   8 ;;; (at your option) any later version.
   9 ;;;
  10 ;;; This program is distributed in the hope that it will be useful,
  11 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 ;;; GNU Lesser General Public License for more details.
  14 ;;;
  15 ;;; You should have received a copy of the GNU Lesser General Public
  16 ;;; License along with this software; see the file COPYING.LESSER.  If
  17 ;;; not, write to the Free Software Foundation, Inc., 51 Franklin
  18 ;;; Street, Fifth Floor, Boston, MA 02110-1301 USA
  19
  20 (define-module (benchmarks write)
  21   #:use-module (benchmark-suite lib))
  22
  23 (define %narrow-string
  24   (make-string 30 #\a))
  25
  26 (define %wide-string
  27   (make-string 30 #\λ))
  28
  29 (define %long-string
  30   (make-string 300 #\x))
  31
  32 (define-syntax repeat
  33   (lambda (s)
  34     (syntax-case s ()
  35       ((_ 1 exp)
  36        #'exp)
  37       ((_ count exp)
  38        (with-syntax ((count (- (syntax->datum #'count) 1)))
  39          #'(begin
  40              exp
  41              (repeat count exp)))))))
  42
  43 \f
  44 (with-benchmark-prefix "string-hash"
  45
  46   (benchmark "narrow string" 100000
  47     (repeat 100 (string-hash %narrow-string)))
  48
  49   (benchmark "wide string" 100000
  50     (repeat 100 (string-hash %wide-string)))
  51
  52   (benchmark "long string" 100000
  53     (repeat 100 (string-hash %long-string))))