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; Fastnumio - Efficient hex string I/O ops for Common Lisp streams
; Copyright (C) 2015 Centaur Technology
;
; Contact:
; Centaur Technology Formal Verification Group
; 7600-C N. Capital of Texas Highway, Suite 300, Austin, TX 78731, USA.
; http://www.centtech.com/
;
; License: (An MIT/X11-style license)
;
; Permission is hereby granted, free of charge, to any person obtaining a
; copy of this software and associated documentation files (the "Software"),
; to deal in the Software without restriction, including without limitation
; the rights to use, copy, modify, merge, publish, distribute, sublicense,
; and/or sell copies of the Software, and to permit persons to whom the
; Software is furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be included in
; all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
; DEALINGS IN THE SOFTWARE.
;
; Original author: Jared Davis <jared@centtech.com>
(ql:quickload :fastnumio)
(ql:quickload :trivial-garbage)
(in-package "FASTNUMIO")
(defun get-bytes ()
#+ccl
(ccl::total-bytes-allocated)
#+sbcl
(sb-ext::get-bytes-consed)
#+(and (not sbcl) (not ccl))
0)
;; write-hex performance testing
(defun test-builtin (ntimes nums stream)
(declare (type fixnum ntimes))
(format t "Testing FORMAT.~%")
(loop for i fixnum from 1 to ntimes do
(loop for num in nums do
(format stream "~x" num))))
(defun test-safe (ntimes nums stream)
(declare (type fixnum ntimes))
(format t "Testing WRITE-HEX.~%")
(loop for i fixnum from 1 to ntimes do
(loop for num in nums do
(write-hex num stream))))
(defun test-unsafe (ntimes nums stream)
(declare (type fixnum ntimes))
(format t "Testing SCARY-UNSAFE-WRITE-HEX.~%")
(loop for i fixnum from 1 to ntimes do
(loop for num in nums do
(scary-unsafe-write-hex num stream))))
(defun gc ()
(tg::gc :full t :verbose nil))
(defmacro my-time (form)
;; Returns (cons seconds bytes)
`(let ((start-bytes (get-bytes))
(start-time (get-internal-real-time))
(blah (time ,form))
(end-time (get-internal-real-time))
(end-bytes (get-bytes)))
(declare (ignore blah))
(cons (/ (coerce (- end-time start-time) 'float)
internal-time-units-per-second)
(- end-bytes start-bytes))))
(defun nice-bytes (x)
(cond ((< x (expt 2 10))
(format nil "~5DB" x))
((< x (expt 2 20))
(format nil "~5,1FK" (/ (coerce x 'float) (expt 2 10))))
((< x (expt 2 30))
(format nil "~5,1FM" (/ (coerce x 'float) (expt 2 20))))
(t
(format nil "~5,1FG" (/ (coerce x 'float) (expt 2 30))))))
(defparameter *times*
(loop for x in '((32 . 1000000) ;; 2^N . NTIMES
(60 . 1000000)
(64 . 800000)
(80 . 600000)
(128 . 500000)
(256 . 300000)
(512 . 150000))
collect
(let* ((n (car x))
(ntimes (cdr x))
(limit (expt 2 n))
(nums (loop for i from 1 to 10 collect (random limit))))
(format t "~% --- Testing hex writing of numbers up to 2^~d --- ~%" n)
(with-open-file (stream "/dev/null"
:direction :output
:if-exists :append)
(let* ((unsafe-time (progn (gc) (my-time (test-unsafe ntimes nums stream))))
(safe-time (progn (gc) (my-time (test-safe ntimes nums stream))))
(fmt-time (progn (gc) (my-time (test-builtin ntimes nums stream)))))
(list n fmt-time safe-time unsafe-time))))))
(progn
(format t "~%")
(format t " N FMT SAFE/Speedup UNSAFE/Speedup~%")
(format t "---------------------------------------------------------------~%~%")
(loop for elem in *times* do
;; Times
(let* ((n (first elem))
(fmt (car (second elem)))
(safe (car (third elem)))
(unsafe (car (fourth elem)))
(sspeedup (if (< fmt safe) (- (/ safe fmt)) (/ fmt safe)))
(uspeedup (if (< fmt unsafe) (- (/ unsafe fmt)) (/ fmt unsafe))))
(format t "~10D ~10,2Fs ~10,2Fs/~3,2Fx ~10,2Fs/~3,2Fx~%"
n fmt safe sspeedup unsafe uspeedup))
;; Bytes
(let* ((builtin (cdr (second elem)))
(safe (cdr (third elem)))
(unsafe (cdr (fourth elem)))
(sspeedup (if (eql builtin 0)
"???"
(* 100 (/ (coerce safe 'float) builtin))))
(uspeedup (if (eql builtin 0)
"???"
(* 100 (/ (coerce unsafe 'float) builtin)))))
(format t "~10a ~7a ~7a ~3,1F% ~7a ~3,1F%~%"
""
(nice-bytes builtin)
(nice-bytes safe) sspeedup
(nice-bytes unsafe) uspeedup))
(format t "~%"))
(format t "----------------------------------------------------------------~%")
(format t "~%"))
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