OK, two things: 1. I was using UsbMount for the USB mounted hard drive, and it is slow by default - writes are double-checked as they're written. Ref 'sync' in https://github.com/hfuchs/usbmount/blob/master/usbmount.conf - so much time lost :-(
MoreUtils' sponge (via pipe) made it faster to the same USB hard drive - different low-level libc calls to openssl? 2. I made a mistake about the built in SSD - it was fast regardless, despite previous advice. - Paul On Mon, Oct 31, 2016 at 8:27 AM, Paul Hammant <p...@hammant.org> wrote: > I'm curious as to what could make a checkin of a single 10MB file take 3 > mins on a Linux machine, when it is 2 seconds on a Mac. > > > > I'm able to reproduce it easily: > > > > svnadmin create --fs-type fsx fsxRoot > > svn checkout file://$(pwd)/fsxRoot testLocalCheckout > > cd testLocalCheckout > > openssl rand 10000000 | base64 > banana > > svn add banana > > time svn ci -m "test banana" > > > > The same (physical not virtual) Linux machine isn't generally slow - the > creation of the file and the copying of it around, takes a couple seconds > on that machine, and there's no load on the box at any time. The drive is > SSD, but the same poor perf happens if you run the same test on USB3 drive > attached. > > > > The results are the same for FSFS and FSX, by the way. > > > Svn is at v1.9.3 on that Ubuntu 16.04 box - but I couldn't see anything > in the changelog that noted it as slow that was fixed in v1.9.4. > > > > - Paul > >
