<div dir="ltr"><div>Good call. Got the time down with SBCL to 3.5 seconds. So still more than twice Java. ABCL with the same code with the big file (5.8G) is around 110+ seconds.</div><div><br></div><div>I'm still surprised by ABCL being SO much slower than SBCL especially with Java being faster than SBCL.</div><div><br></div><div>Thoughts?</div><div><br></div><div>Thanks,</div><div>Garrett.<br></div><div><br></div><div>P.S. I also took the "time" out, I am doing SBCL/ABCL the same way as I did in Java with the getting the start time before reading and getting the time after reading. and calculating the duration that way. It didn't make any difference that I could see in the times.</div><div><br></div><div>Lisp code:</div><div> (with-open-file (stream "/media/danger/OS/temp/great_expectations.iso"<br> :element-type '(unsigned-byte 8)<br> :external-format 'iso-8859-1) ; jars.txt iso-8859-1 also tried :default and the time was the same<br> (let ((size (file-length stream))<br> (buffer-size (* 16 1024 1024)) ; 16M<br> (start (get-internal-real-time))<br> )<br> (loop with buffer = (make-array buffer-size :element-type '(unsigned-byte 8))<br> for n-characters = (read-sequence buffer stream)<br> while (< 0 n-characters))<br> (format t "took ~,2f secs" (/ (- (get-internal-real-time) start)<br> internal-time-units-per-second))<br> ))<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Oct 21, 2022 at 2:52 PM Pascal Bourguignon <<a href="mailto:pjb@informatimago.com" target="_blank">pjb@informatimago.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Le 21/10/2022 à 23:18, Garrett Dangerfield a écrit :<br>
> I tried changing (make-array buffer-size :element-type 'character)<br>
> to<br>
> (make-array buffer-size :element-type 'byte)<br>
> and I got additional warnings and it took 70 seconds instead of 20.<br>
> <br>
<br>
You need to specify a binary file too!<br>
<br>
(deftype octet () '(unsigned-byte 8))<br>
(with-open-file (stream #P"~/Downloads/Discord.dmg"<br>
:element-type 'octet<br>
:external-format :default)<br>
(print `(size = ,(file-length stream)))<br>
(let ((buffer-size (* 16 1024 1024)))<br>
(time<br>
(loop with buffer = (make-array buffer-size :element-type 'octet)<br>
for n-bytes = (read-sequence buffer stream)<br>
while (plusp n-bytes)))))<br>
<br>
<br>
<br>
-- <br>
__Pascal Bourguignon__<br>
<br>
<br>
</blockquote></div>