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[Misaki <952108@xxxxxxxxxxxxxxxxxx>]

I don't know if there are multiple memory leaks, but I am reporting on
this one. The Bugzilla report is not relevant to my particular version
as one comment on Bugzilla says this:

>Obviously also related to wcslen so correctly closed as NOTABUG in
Nautilus because it is not a bug in Nautilus.

wcslen is described as "Get wide string length. Returns the length of
the C wide string wcs. This is the number of wide characters between
..."


So while the Bugzilla report as marked as RESOLVED DUPLICATE, I am reporting a new issue.

Steps to replicate:

1) Open a folder with many image files.
2) Change to list view.
3) zoom to maximum size, it's faster this way but still happens at normal size.
4) Scroll up and down.

Result, nautilus will use more memory.

The fact that it leaks memory faster at a higher zoom level indicates
that it isn't related to the length of strings, but rather has to do
with images somehow.

This doesn't happen in icon view. What does happen in icon view, if you
zoom to maximum size, is that nautilus temporary uses more memory while
it caches higher-resolution thumbnails it generates, possibly only if
the existing thumbnails aren't large enough. But most or all of this
memory is freed when you reload the folder or navigate away. This
doesn't happen with the memory from this leak. Memory usage does go down
slightly, like for me it just went from ~830 MiB or something to 780
when I went from list view to icon view, but when I did this after
zooming in icon view, it went from ~230 to ~60 MiB.

When I was testing this before, it seemed like the memory didn't leak
until you had scrolled far enough; just scrolling a bit, like half a
page on normal zoom, didn't seem to cause a leak even when repeated. But
using a high zoom makes it easy enough to replicate that details like
that shouldn't matter.

In fact, simply increasing the zoom level could cause a memory leak. I
just did that, without scrolling, and watched memory usage go from ~780,
where I was before, up to 975 MiB. After returning to normal zoom and
refreshing, memory went down to ~914. After repeating the process, over
1 GiB.

At normal size, in list view, scrolling down to the bottom of 342 images
and then back up to the top causes Nautilus to use about 20 MiB more
memory, each time you do it. In icon view, doing this has no noticeable
effect. However, changing to list view, and then changing back to icon
view, with no other actions taken, does cause memory to increase by
about 6 MiB each time I do it.

New thumbnail creation is probably happening because there is high CPU
use; it's possible it's not caching thumbnails in list view., or caching
a limited amount or number and not freeing memory after it decides a
thumbnail is no longer cached. At largest zoom, each image was adding
1.3 MiB of memory to Nautilus when I pressed down once; same thing if I
pressed 'home' and 'end' repeatedly.

I'm using Nautilus 3.10.1, with Ubuntu 14.10.

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Packages, which is subscribed to nautilus in Ubuntu.
https://bugs.launchpad.net/bugs/952108

Title:
  [Precise] Nautilus: memory leak

Status in Nautilus:
  New
Status in nautilus package in Ubuntu:
  Triaged

Bug description:
  Hello,

  It's just to note that Nautilus has memory leaks with the latest
  version: with an uptime of 10 hours, Nautilus uses 420Mo.

  It's maybe interesting to know that:
   * I'm using a slideshow and not one single image as background.
   * I opened Nautilus in directories where big files were being downloaded (and Nautilus regularly refreshed their preview)
   * I made a few actions (like opening directories with a lot of files, moving files, creating directories, extracting tarball, etc.)
   * I'm using a few plugins like nautilus-dropbox, nautilus-image-converter, etc.
   * I've bookmarks with special characters like 'Vidéos' and 'Téléchargements'.

  I hope it will help you to fix this bug ;)

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: nautilus 1:3.3.91-0ubuntu4
  ProcVersionSignature: Ubuntu 3.2.0-18.29-generic 3.2.9
  Uname: Linux 3.2.0-18-generic x86_64
  ApportVersion: 1.94.1-0ubuntu2
  Architecture: amd64
  Date: Sun Mar 11 10:35:32 2012
  GsettingsChanges:
   org.gnome.nautilus.window-state geometry '800x552+483+87'
   org.gnome.nautilus.window-state start-with-status-bar true
  InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
  SourcePackage: nautilus
  UpgradeStatus: No upgrade log present (probably fresh install)

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