It would be useful to get profiles for varying configs (especially Windows/Mac
with various GPUs, and Linux with NVidia binary drivers)

I expect about 20-40% slowdown in GL2, ~10% up/down in GL1 compared to
previous code. GL1 is enabled by --safe-mode or if GL2 fails to
initialize
(e.g. on drivers without GL2 support).

My profiles on AMD catalyst and open source, Nouveau and Intel (all
Linux) are consistent

If you make any measurements, please specify CPU/GPU, resolution of
Stellarium window, drivers, FPS of previous and current code. Also
what is on the screen
(e.g. plugins enabled? just opened Stellarium?, etc.)

Especially important are any cases where FPS drops unpredictably low -
this happened with Pulsars before, but was fixed since.


Ferdinand Majerech

On 8/31/12, Timothy Reaves <trea...@silverfieldstech.com> wrote:
>       This is complete.  For those who may have not received the other 
> comments,
> I'll repeat them here.  I'm worried about the performance of this code. On
> my machine:
> - SSD (No HDD)
> - 16 GB memory
> - NVidia GeForece GT 650M with 1G memory
> - Quad core 2.6 GHz Intel Core i7
>
> the code is about 20% of the performance of the old code.  So from just over
> 75FPS to around 20FPS.  Even in safe-mode, which is still OpenGL 1.0, it is
> only 30% (about 24FPS).   This is hugely degraded FPS performance, and yes,
> it is very noticeable at an interaction level.
>
> Ferdinand has not experienced this dramatic of a performance hit on his
> development machine.  Fabien has seen this code, and approved it.
>
> Please have a look, and report your findings.
>
> Thanks.
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