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1 | ;;; subr.bm --- Measure the subr invocation cost. -*- Scheme -*- |
2 | ;;; | |
3 | ;;; Copyright (C) 2009 Free Software Foundation, Inc. | |
4 | ;;; | |
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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. | |
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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 | |
53befeb7 | 13 | ;;; GNU Lesser General Public License for more details. |
b786a5bb | 14 | ;;; |
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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 | |
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19 | |
20 | (define-module (benchmarks subrs) | |
21 | :use-module (benchmark-suite lib)) | |
22 | ||
23 | \f | |
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24 | (define hook1 (make-hook 1)) |
25 | (define hook3 (make-hook 3)) | |
26 | ||
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27 | (with-benchmark-prefix "subr invocation" |
28 | ||
29 | (benchmark "simple subr" 700000 | |
30 | ;; 1 required argument, 0 optional arguments, no rest. | |
31 | (1+ 0)) | |
32 | ||
33 | (benchmark "generic subr" 700000 | |
34 | ;; 2 required arguments, 4 optional arguments, no rest. | |
35 | ||
36 | ;; In Guile 1.8 and earlier, such subrs are implemented as "compiled | |
37 | ;; closures" (cclos). There, when a cclo/gsubr is called, the evaluator | |
38 | ;; goes through `SCM_APPLY ()' and conses the arguments, which is more | |
39 | ;; costly than the invocation of a "simple subr". | |
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40 | (string= "foo" "bar")) |
41 | ||
42 | (benchmark "generic subr with rest arg" 700000 | |
43 | ;; 1 required argument, 0 optional arguments, 1 rest. | |
44 | (run-hook hook1 1)) | |
45 | ||
46 | (benchmark "generic subr with rest arg and 3+ parameters" 700000 | |
47 | ;; 1 required argument, 0 optional arguments, 1 rest. | |
48 | ||
49 | ;; The evaluator considers calls with 3 and more parameters as a general | |
50 | ;; form and always stores the arguments into a list. | |
51 | (run-hook hook3 1 2 3))) | |
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52 | |
53 | \f | |
54 | (with-benchmark-prefix "subr application" | |
55 | ||
56 | (benchmark "simple subr" 700000 | |
57 | (apply 1+ '(0))) | |
58 | ||
59 | (benchmark "generic subr" 700000 | |
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60 | (apply string= "foo" '("bar"))) |
61 | ||
62 | (benchmark "generic subr with rest arg" 700000 | |
63 | (apply run-hook hook1 '(1))) | |
64 | ||
65 | (benchmark "generic subr with rest arg and 3+ parameters" 700000 | |
66 | (run-hook hook3 1 2 '(3)))) |