[Sugar-devel] [Dextrose] [PATCH v5 sugar] Pulsing icon delayed by 5 seconds or so SL#2080

James Cameron quozl at laptop.org
Tue Oct 26 19:50:14 EDT 2010

On Tue, Oct 26, 2010 at 05:41:58PM +0530, Anurag Chowdhury wrote:
> The conclusion of XO-1.5 being nearly 2.5 times faster than the XO-1
> could be verified by comparing their hardware specifications. at
> http://en.wikipedia.org/wiki/OLPC_XO-1  (For XO-1) and
> http://wiki.laptop.org/go/Hardware_specification_1.5 (For XO-1.5)

These specifications do not describe CPU or graphics performance, and so
your conclusion "2.5 times faster" is not supported by these

> Also we can see the test results of James'(quozl) at
> http://bugs.sugarlabs.org/ticket/245 which suggests that XO-1.5 is
> atleast twice as fast as XO-1.

That test compared two entirely different methods of rendering the
languages control panel section; one method used by Sugar 0.82.1 and the
other method used Sugar 0.84.11.  So your conclusion "2.5 times faster"
is not supported by this test either.

http://dev.laptop.org/ticket/9325 is the best test result that I can
remember that compares CPU and graphics performance, and the latest
results there show XO-1 and XO-1.5 at about equal, because the bit plane
depth has changed from 16 on XO-1 to 24 on XO-1.5 at the same time as
the graphics subsystem became faster.  The test is less relevant to
Sugar though, since it is (a) full screen fill, and (b) using SDL and
pygame rather than GTK+.

I'd like to test your change on Sugar 0.84 (not HEAD) on XO-1 and
XO-1.5 once I can understand how to measure the performance.  It is more
important for me that power is conserved.

James Cameron

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