Noise spikes CPU usage to 100% on startup and during playback; is useful for load testing a CPU

[Naftuli Kay]

When I start Noise, I see my CPU usage quickly spike to 100% usage on 3 cores. It's hard to imagine what kind of calculations it's doing, especially since this machine is overclocked to 4.9GHz. During playback, the interface will also freeze and the CPU will spike. In any case, this makes Noise much less usable for me, personally, though I'd love to use it. It's frustrating pausing the playback and not experiencing the actual pause 15-45 seconds later, due to Noise being frozen at 100% CPU.

ProblemType: Bug
DistroRelease: elementary OS 0.2
Package: elementary-desktop (not installed)
Uname: Linux 3.7.1-030701-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu15+elementary3~precise1
Architecture: amd64
CrashDB: elementary_meta
Date: Wed Jan 16 09:17:05 2013
InstallationMedia: elementary OS 0.2 "Luna" - Beta 1 amd64 (20121114)
MarkForUpload: True
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: elementary-meta
SuspiciousXErrors:
 [WARNING:flash/platform/pepper/pep_viewclient.cpp(345)] Could not create display context.
 [WARNING:flash/platform/pepper/pep_viewclient.cpp(345)] Could not create display context.
 [WARNING:flash/platform/pepper/pep_viewclient.cpp(345)] Could not create display context.
 [WARNING:flash/platform/pepper/pep_viewclient.cpp(345)] Could not create display context.
ThirdParty: True
UpgradeStatus: No upgrade log present (probably fresh install)

[Corentin Noël (tintou)]

Are you using the last version ?
How large is your library ?
Can you remove the ~/.local/share/noise folder and retry ?

Here it only use 4% of my CPU (2.50GHz)

[Naftuli Kay (naftulikay)]

Not seeing it spike anymore. There should probably be a feature that the database should be wiped and rebuilt if Noise changes significantly so that others shouldn't experience this issue. Thanks for the tip!

[Naftuli Kay (naftulikay)]

Spoke too soon, I'm still seeing it spike from time to time, though it seems to be much less now.

[Corentin Noël (tintou)]

The recent changes should have fixed this !

[Ryan Reamsbottom (ryanrms)]

Did the package get updated yet? I'm still getting massive cpu usage and hanging both on startup and when attempting playback on Noise.

[Cody Garver (codygarver)]

Follow these instructions to get the improved performance:

https://plus.google.com/107345637861329011169/posts/fJyeVBfLhvz

[Naftuli Kay (naftulikay)]

Still not working 100%. It stopped hanging at 30 seconds, but it's now hanging elsewhere.