Re: Image scaling performance

["Vladimir 'φ-coder/phcoder' Serbinenko" <phcoder@gmail.com>]

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
> <phcoder@gmail.com> 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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