ice-9/time.scm

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  42 \f
  43 ;;; Commentary:
  44
  45 ;; This module exports a single macro: `time'.
  46 ;; Usage: (time exp)
  47 ;;
  48 ;; Example:
  49 ;; guile> (time (sleep 3))
  50 ;; clock utime stime cutime cstime gctime
  51 ;; 3.01  0.00  0.00   0.00   0.00   0.00
  52 ;; 0
  53
  54 ;;; Code:
  55
  56 (define-module (ice-9 time)
  57   :use-module (ice-9 format)
  58   :export (time))
  59
  60 (define (time-proc proc)
  61   (let* ((gc-start (gc-run-time))
  62          (tms-start (times))
  63          (result (proc))
  64          (tms-end (times))
  65          (gc-end (gc-run-time)))
  66     (define (get proc start end)
  67       (/ (- (proc end) (proc start)) internal-time-units-per-second))
  68     (display "clock utime stime cutime cstime gctime\n")
  69     (format #t "~5,2F ~5,2F ~5,2F ~6,2F ~6,2F ~6,2F\n"
  70             (get tms:clock tms-start tms-end)
  71             (get tms:utime tms-start tms-end)
  72             (get tms:stime tms-start tms-end)
  73             (get tms:cutime tms-start tms-end)
  74             (get tms:cstime tms-start tms-end)
  75             (get identity gc-start gc-end))
  76     result))
  77
  78 (define-macro (time exp)
  79   `(,time-proc (lambda () ,exp)))
  80
  81 ;;; time.scm ends here