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Date:	Tue, 8 May 2018 04:35:06 +0200 (CEST)
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From:	gedau AT igor2 DOT repo DOT hu
Subject:	Re: Odp: Re: [geda-user] Opengl PCB and mainline PCB - pcb-rnd
	aspects
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Hello Michael,

layer compositing test:

we have the file from yesterday (http://igor2.repo.hu/tmp/4096.lht.gz) and 
a new file, that has the same lines spread on 8 different copper layers:

http://igor2.repo.hu/tmp/4096_lay.lht.gz

Please run pcb-rnd without a board, then:

1. pick some medium window size, like ~half of screen estate on one of 
your screens

2. load the single layer version (4096.lht); do not zoom or pan, leave it 
as it is after load, and run benchmark() a few times - we need to average 
the value of multiple runs, they show some variation here (I got values 
between 50.5 and 53.9 for this file)

3. within the same pcb-rnd session, please load the multi-layer version 
(4096_lay.lht), again leave it as it is and run benchmark() a few times (I 
got values (I got values between 49.5 and 54)

This tests one specific rendering feature of pcb-rnd that is different 
compared to geda/pcb's gl rendering. If we get about the same values, we 
know it's not our "new" layer compositing code. If we see the multi-layer 
version being much slower, we know we need to implement the same 
optimization in the gl HID that we have in the software render HIDs.

TIA,

Igor2

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