Re: Image scaling performance

[Michael Zimmermann]

well as u can see, boottime isn't detailed enough:
http://puu.sh/gdRXp/fc8fc176ce.png

Maybe I can hack printf to act a boottime.

On Thu, Feb 26, 2015 at 6:16 PM, Vladimir 'φ-coder/phcoder' Serbinenko
<address@hidden> wrote:
> On 26.02.2015 18:10, Michael Zimmermann wrote:
>>
>> Is there a way to create a performance profile so I can see what
>> exactly needs so much time? I don't have JTAG but maybe UART+GDB could
>> help with that.
>>
> Have a look at boot_time.
>
>> adding prints is kind of annoying :D
>>
>> On Thu, Feb 26, 2015 at 5:44 PM, Vladimir 'φ-coder/phcoder' Serbinenko
>> <address@hidden> wrote:
>>>
>>> On 25.02.2015 19:46, Michael Zimmermann wrote:
>>>>
>>>>
>>>> I'm still questioning the efficiency
>>>> math operations because on slow devices there are other bottlenecks of
>>>> the same kind(like de/compression).
>>>
>>>
>>> That's pure speculation at that point. GRUB has 3 compression algorithms:
>>> - minilzo. Has some divisions in parts which GRUB doesn't use. Those
>>> parts
>>> are easily disablable and I'll just do so.
>>> - gzip. Uses division only in zlib header check. I'll optimise it a
>>> little
>>> but it's only one division in header check, not in compressed data body.
>>> - xz. No divisions
>>>
>>>
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