From owner-freebsd-hackers  Thu Apr 11 14:43:22 1996
Return-Path: owner-hackers
Received: (from root@localhost)
          by freefall.freebsd.org (8.7.3/8.7.3) id OAA15310
          for hackers-outgoing; Thu, 11 Apr 1996 14:43:22 -0700 (PDT)
Received: from mail.think.com (Mail1.Think.COM [131.239.33.245])
          by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id OAA14893
          for <hackers@freefall.freebsd.org>; Thu, 11 Apr 1996 14:38:24 -0700 (PDT)
Received: from Early-Bird-1.Think.COM by mail.think.com; Thu, 11 Apr 96 17:35:49 -0400
Received: from compound.think.com ([206.10.99.158]) by Early-Bird.Think.COM; Thu, 11 Apr 96 17:35:46 EDT
Received: (from alk@localhost) by compound.think.com (8.7.5/8.6.112) id QAA01990; Thu, 11 Apr 1996 16:35:46 -0500 (CDT)
Date: Thu, 11 Apr 1996 16:35:46 -0500 (CDT)
Message-Id: <199604112135.QAA01990@compound.think.com>
From: Tony Kimball <alk@Think.COM>
To: hackers@freefall.freebsd.org
Subject: async mounts (appropos 'make world')
Sender: owner-hackers@FreeBSD.ORG
X-Loop: FreeBSD.org
Precedence: bulk


/work is mounted async, /usr is mounted sync:

; time cp -r rts10 ~alk
time cp -r rts10 ~alk
    24r     0.0u     1.3s	cp -r rts10 /usr/home/alk
; time cp -r ~alk/rts10 /work/tmp
time cp -r ~alk/rts10 /work/tmp
    10r     0.0u     1.2s	cp -r /usr/home/alk/rts10 /work/tmp

; time rm -rf ~alk/rts10
time rm -rf ~alk/rts10
    11r     0.0u     0.3s	rm -rf /usr/home/alk/rts10
; time rm -rf /work/tmp/rts10
time rm -rf /work/tmp/rts10
     0r     0.0u     0.0s	rm -rf /work/tmp/rts10


I suggest that those timing 'make world' might find it
interesting to compare times doing the build on an async mount.