[arch-projects] [mkinitcpio] boot times with different COMPRESSIONs

[Seblu]

On Mon, Aug 1, 2011 at 11:07 PM, Tom Gundersen <teg at jklm.no> wrote:
> In case it is not clear: the only imortant number is the "kernel"
> time. In which gzip/lzop are the clear winners.
>
> On Mon, Aug 1, 2011 at 11:05 PM, Tom Gundersen <teg at jklm.no> wrote:
>> Hi guys,
>>
>> We have a lot of compression options now for mkinitcpio, so I figured
>> I'd try to measure which one gives us the fastest boot. I guess boot
>> speed is the most important metric when deciding which one to choose.
>>
>> The measurements were done on an Lenovo ThinkPad x60, with an Intel
>> Core 2 processor and an 5400 rpm HDD, so your milage might obviously
>> vary.
>>
>> Here are my numbers:
>>
>> xz
>> Startup finished in 710ms (kernel) + 2526ms (initrd) + 14335ms
>> (userspace) = 17572ms
>> Startup finished in 610ms (kernel) + 2448ms (initrd) + 48159ms
>> (userspace) = 51218ms
>> Startup finished in 710ms (kernel) + 2458ms (initrd) + 11294ms
>> (userspace) = 14462ms
>> Startup finished in 720ms (kernel) + 2488ms (initrd) + 12271ms
>> (userspace) = 15480ms
>> Startup finished in 710ms (kernel) + 2446ms (initrd) + 9602ms
>> (userspace) = 12758ms
>>
>> gzip
>> Startup finished in 560ms (kernel) + 2422ms (initrd) + 9917ms
>> (userspace) = 12899ms
>> Startup finished in 560ms (kernel) + 2445ms (initrd) + 9734ms
>> (userspace) = 12740ms
>> Startup finished in 560ms (kernel) + 2451ms (initrd) + 10544ms
>> (userspace) = 13556ms
>> Startup finished in 560ms (kernel) + 2427ms (initrd) + 9756ms
>> (userspace) = 12744ms
>> Startup finished in 570ms (kernel) + 2439ms (initrd) + 9823ms
>> (userspace) = 12832ms
>>
>> bzip2
>> Startup finished in 810ms (kernel) + 2428ms (initrd) + 9690ms
>> (userspace) = 12928ms
>> Startup finished in 810ms (kernel) + 2448ms (initrd) + 9635ms
>> (userspace) = 12893ms
>> Startup finished in 810ms (kernel) + 2504ms (initrd) + 10212ms
>> (userspace) = 13526ms
>> Startup finished in 810ms (kernel) + 2445ms (initrd) + 8838ms
>> (userspace) = 12094ms
>> Startup finished in 820ms (kernel) + 2438ms (initrd) + 9613ms
>> (userspace) = 12871ms
>>
>> lzma
>> Startup finished in 790ms (kernel) + 2441ms (initrd) + 9335ms
>> (userspace) = 12567ms
>> Startup finished in 790ms (kernel) + 2442ms (initrd) + 9662ms
>> (userspace) = 12895ms
>> Startup finished in 770ms (kernel) + 2432ms (initrd) + 10199ms
>> (userspace) = 13401ms
>> Startup finished in 770ms (kernel) + 2425ms (initrd) + 9922ms
>> (userspace) = 13117ms
>> Startup finished in 770ms (kernel) + 2435ms (initrd) + 9502ms
>> (userspace) = 12708ms
>>
>> lzop
>> Startup finished in 550ms (kernel) + 2461ms (initrd) + 10730ms
>> (userspace) = 13742ms
>> Startup finished in 570ms (kernel) + 2421ms (initrd) + 20680ms
>> (userspace) = 23671ms
>> Startup finished in 550ms (kernel) + 2435ms (initrd) + 8752ms
>> (userspace) = 11738ms
>> Startup finished in 570ms (kernel) + 2454ms (initrd) + 9575ms
>> (userspace) = 12600ms
>> Startup finished in 550ms (kernel) + 2453ms (initrd) + 8540ms
>> (userspace) = 11543ms

Interresting! Thanks

-- 
Sébastien Luttringer
www.seblu.net