[Mesa-dev] A few NIR compile time optimisations

[Marek Olšák]

st_link_shader takes 55% of CPU time with NIR, and 9% with TGSI.

nir_validate_shader 49%

nir_validate_shader is overused. It doesn't make sense even in debug builds.

Marek

On Wed, Feb 13, 2019 at 4:26 AM Connor Abbott <cwabbott0 at gmail.com> wrote:

> Reviewed-by: Connor Abbott <cwabbott0 at gmail.com>
>
> I'm a bit surprised it's that slow... do you have any idea what's going
> on? I've made flamegraphs in the past on i965 to see where most of the time
> is spent.
>
> On Wed, Feb 13, 2019 at 9:00 AM Timothy Arceri <tarceri at itsqueeze.com>
> wrote:
>
>> Currently the radeonsi NIR backend takes around twice the time
>> of the tgsi backend to compile shader-db. These are some first
>> steps at reducing the overhead of NIR.
>>
>> This series reduces the compile time of a Deus Ex program I was
>> profiling by around 5%.
>>
>>
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