Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Interest in a lower compression iso optimized for USB booting?
#46
You're welcome. Right, it doesn't look possible to replace XZ with Zstandard for the main ISO and stay within the 700 MiB size limit. However, I think it is possible to replace lz4 with Zstandard for the low-compression ISO and preserve the USB/VM boot speed.

I have performed a rough benchmark to see if this is the case. For the benchmark, I used a VM (VirtualBox 7 on a Linux host) instead of a USB flash drive so USB transfer speed didn't cap the decompression speed. I put the ISOs on an NVMe drive and created a variant of the RC1 ISO with Zstandard SquashFS. To measure the approximate boot time, I started my phone's stopwatch when I reset the VM and stopped it when Conky appeared on the screen. When the boot menu came up, I quickly pressed Enter to skip it. Like I said, rough! :-)

Here are the results I got (in seconds):
  • dsl-2024.rc1.iso (648M): 36, 37, 36
  • dsl-2024.rc1.lz4.iso (1116M): 24, 23, 25
  • dsl-2024.rc1.zst.iso (767M): 25, 25, 24

It looks like lz4 and Zstandard are both so fast that other factors determine the boot time. The higher maximum possible decompression speed of lz4 doesn't seem to make a difference in this situation.
Reply


Messages In This Thread
RE: Interest in a lower compression iso optimized for USB booting? - by dbohdan - 03-13-2024, 08:41 PM

Forum Jump:


Users browsing this thread: 4 Guest(s)