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Re: supportsDrawGState
From: |
David Chisnall |
Subject: |
Re: supportsDrawGState |
Date: |
Wed, 15 Jun 2011 09:42:25 +0100 |
On 14 Jun 2011, at 23:23, Riccardo Mottola wrote:
> 2011-06-14 22:20:37.650 Jigsaw[2297] Warning: shmget() failed: Cannot
> allocate memory.
> 2011-06-14 22:20:37.652 Jigsaw[2297] Falling back to normal XImage (will be
> slower).
It might be worth removing the XSHM code paths. On recent versions of X and
with a graphics card from after about 1995, using this code is likely to be
slower, because it stops the X server from storing images in VRAM, so generates
a lot more redundant copying across the bus.
> I get those both on FreeBSD and OPenBSD where I tried. Indeed, it seems a bit
> slow.
Slowness is more likely to be due to redundant copying or using synchronous X11
calls than the lack of XSHM.
David
-- Sent from my Difference Engine