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58 lines
2.1 KiB
Scheme
58 lines
2.1 KiB
Scheme
;;;; Copyright (C) 2001, 2004, 2006, 2018 Free Software Foundation, Inc.
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;;;
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;;; Commentary:
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;; This module exports a single macro: `time'.
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;; Usage: (time exp)
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;;
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;; Example:
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;; guile> (time (sleep 3))
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;; clock utime stime cutime cstime gctime
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;; 3.01 0.00 0.00 0.00 0.00 0.00
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;; 0
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;;; Code:
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(define-module (ice-9 time)
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#:use-module (ice-9 format)
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#:export (time))
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(define (time-proc proc)
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(let* ((gc-start (gc-run-time))
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(tms-start (times))
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(results (call-with-values proc list))
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(tms-end (times))
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(gc-end (gc-run-time)))
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;; FIXME: We would probably like format ~f to accept rationals, but
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;; currently it doesn't so we force to a flonum with exact->inexact.
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(define (get proc start end)
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(exact->inexact (/ (- (proc end) (proc start)) internal-time-units-per-second)))
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(display "clock utime stime cutime cstime gctime\n")
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(format #t "~5,2F ~5,2F ~5,2F ~6,2F ~6,2F ~6,2F\n"
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(get tms:clock tms-start tms-end)
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(get tms:utime tms-start tms-end)
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(get tms:stime tms-start tms-end)
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(get tms:cutime tms-start tms-end)
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(get tms:cstime tms-start tms-end)
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(get identity gc-start gc-end))
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(apply values results)))
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(define-syntax-rule (time exp)
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(time-proc (lambda () exp)))
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;;; time.scm ends here
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