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Date: Tue, 15 Sep 2015 22:49:40 +0200 (CEST)
From: Roland Lutz <rlutz AT hedmen DOT org>
To: geda-user AT delorie DOT com
Subject: Re: [geda-user] shortest way towards parsing .pcb files outside
 pcb
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On Sun, 13 Sep 2015, DJ Delorie wrote:
> at one point we designed a binary representation designed for fast 
> loading and smaller disk storage.  The speedup was much greater than we 
> expected (it was a large commonly-used file).

gEDA files are read

- when opening a file
- when loading a symbol/footprint from the library
- when importing a schematic into PCB
- when processing a file with a command-line tool

and written

- when saving a file
- when auto-saving

None of these operations are time-critical.  The only one of these 
operations for which I ever experienced significant lag was importing a 
schematic into PCB, and even then, the time spent loading the schematic 
files was neglegible (yes, I did perform benchmarks).