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[Discuss-gnuradio] Serious performance regression in Gnu Radio recent

From: Marcus D. Leech
Subject: [Discuss-gnuradio] Serious performance regression in Gnu Radio recent
Date: Sun, 05 Feb 2012 15:49:24 -0500
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20111108 Fedora/3.1.16-1.fc14 Thunderbird/3.1.16

I have an application, SIDSuite, that I've been running on my hardware here for about 18 months continuously, with reasonable performance (the UI isn't totally-snappy, but acceptable). Some time recently, with an upgrade of Gnu Radio, the performance became utterly unacceptable--the UI became unusable, and updates to the FFT and Waterfall sinks became very "chunky". I haven't changed the
  app in months and months.

So, I started taking my Gnu Radio back further and further in time, until I was back to "normal". I had to regress my GIT tree back to:

commit 2ed887b69a3b15840830998c4e6157176d427f60
Author: Josh Blum <address@hidden>
Date:   Sat Dec 31 13:06:01 2011 -0800

In order to get decent performance again.

I have no idea what's causing the performance melt-down, but regressing back to that commit fixes it, again with no changes to the
  application in question.

I will try creeping forward from this commit to see if I can narrow it down. Blah.

Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium

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